OPERATOR'S MANUAL MODEL #100641 CHAINSAW - CHAMPION POWER EQUIPMENT
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OPERATOR'S MANUAL
MODEL #100641
Chainsaw
REGISTER YOUR PRODUCT ONLINE
at championpowerequipment.com
or visit championpowerequipment.com
READ AND SAVE THIS MANUAL. This manual contains important safety precautions which should be read and understood before operating the product. Failure to
do so could result in serious injury. This manual should remain with the product.
Specifications, descriptions and illustrations in this manual are as accurate as known at the time of publication, but are subject to change without notice.
REV 20210426 Champion Power Equipment, Inc., Santa Fe Springs, CA USA100641 - Chainsaw Table of Contents
TABLE OF CONTENTS Maintenance................................................. 22
Maintenance Schedule............................................ 22
Introduction.................................................... 3 Adding Bar and Chain Oil............................... .......... 22
Safety Definitions........................................... 3 Adjusting the Bar And Chain Oil Flow............................ 23
Adjusting the Chain Tension...................................... 23
Important Safety Instructions........................ 4
Removing and Installing the Guide Bar and Saw Chain......... 24
Fuel Safety.......................................................... 4
Maintaining the Saw Chain....................................... 26
While Operating..................................................... 4
Sharpening the Saw Chain.............................. .......... 26
Kickback Safety..................................................... 6
Maintaining the Guide Bar.............................. .......... 27
Other Safety Warnings.............................................. 7
Lubricating the Guide Bar Sprocket Tip................ .......... 27
Safety Labels........................................................ 8
Replacing the Guide Bar and Saw Chain......................... 28
Safety Symbols...................................................... 9
Maintaining the Air Filter................................ .......... 28
Quickstart Label Symbols........................................ 10
Adjusting the Idle Speed................................ .......... 29
Controls and Features.................................. 11 Maintaining the Spark Plug............................. .......... 29
Chainsaw.......................................................... 11 Cleaning................................................. .......... 30
Safety Features................................................... 12
Storage................................................ ......... 30
Assembly...................................................... 13 Long-term Storage (30 days or more). . ................ .......... 31
Adding Bar and Chain Oil: Initial Use............................. 13 Preparing the Chainsaw for Use after Long-term Storage...... 31
Adjusting the Chain Tension: Initial Use.......................... 13
Specifications...................................... ......... 32
Oil and Fuel Mixing Instructions.................................. 13
Chainsaw Specifications.......................................... 32
Operation...................................................... 14 Replacement Parts...................................... .......... 32
Starting and Stopping............................................. 14
Troubleshooting............................................ 33
Tips for Best Results.............................................. 16
Preparing the Work Area.......................................... 16
Holding the Chainsaw............................................. 17
Wedges and Recommended Tools................................ 17
Cutting Procedure Basics......................................... 18
Felling: Safety..................................................... 18
Felling: Procedure................................................. 18
Limbing............................................................ 20
Bucking: Safety. .................................................. 20
Bucking: Procedure............................................... 20
Pruning............................................................ 21
2100641 - Chainsaw Introduction
INTRODUCTION SAFETY DEFINITIONS
Congratulations on your purchase of a Champion Power Equipment The purpose of safety symbols is to attract your attention to
(CPE) product. CPE designs, builds, and supports all of our possible dangers. The safety symbols, and their explanations,
products to strict specifications and guidelines. With proper deserve your careful attention and understanding. The safety
product knowledge, safe use, and regular maintenance, this warnings do not by themselves eliminate any danger.
product should bring years of satisfying service. The instructions or warnings they give are not substitutes for
Every effort has been made to ensure the accuracy and proper accident prevention measures.
completeness of the information in this manual at the time of
publication, and we reserve the right to change, alter and/or DANGER
improve the product and this document at any time without prior DANGER indicates a hazardous situation which, if not avoided,
notice. will result in death or serious injury.
Since CPE highly values how our products are designed,
manufactured, operated and are serviced, and also highly value
WARNING
your safety and the safety of others, we would like you to take the
time to review this product manual and other product materials WARNING indicates a hazardous situation which, if not
thoroughly and be fully aware and knowledgeable of the assembly, avoided, could result in death or serious injury.
operation, dangers and maintenance of the product before use.
Fully familiarize yourself, and make sure others who plan on
operating the product fully familiarize themselves too, with the CAUTION
proper safety and operation procedures before each use. Please CAUTION indicates a hazardous situation which, if not avoided,
always exercise common sense and always err on the side could result in minor or moderate injury.
of caution when operating the product to ensure no accident,
property damage, or injury occurs. We want you to continue to use
and be satisfied with your CPE product for years to come. NOTICE
When contacting CPE about parts and/or service, you will need to NOTICE indicates information considered important, but not
supply the complete model and serial numbers of your product. hazard-related (e.g., messages relating to property damaged).
Transcribe the information found on your product’s nameplate
label to the table below
CPE Technical Support Team
1-877-338-0999
MODEL NUMBER
100641
SERIAL NUMBER
DATE OF PURCHASE
PURCHASE LOCATION
3100641 - Chainsaw Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS Fuel Safety
Read all instructions before operating.
DANGER
WARNING GASOLINE AND GASOLINE VAPORS ARE HIGHLY
FLAMMABLE AND EXPLOSIVE.
When using the chainsaw, all safety rules must be followed.
Always read these instructions before operating the chainsaw Fire or explosion can cause severe burns or death.
in order to ensure the safety of the operator and any
bystanders. Always keep these instructions for later use. Gasoline and gasoline vapors:
– Gasoline is highly flammable and explosive.
– Read the instructions carefully. Be familiar with the controls
and proper use of the chainsaw. Know how to stop the – Gasoline can cause a fire or explosion if ignited.
chainsaw and disengage the controls quickly. – Gasoline is a liquid fuel but it’s vapors can ignite.
– Never operate this chainsaw when tired, ill or under the – Gasoline is a skin irritant and needs to be cleaned up
influence of alcohol, drugs or medication. immediately if spilled on skin or clothes.
– Never allow children to operate the chainsaw. Never operate – Gasoline has a distinctive odor, this will help detect potential
the chainsaw without proper instruction. leaks quickly.
– All guards and safety attachments must be installed properly – Gasoline expands or contracts with ambient temperatures.
before operating the chainsaw. Never fill the gasoline tank to full capacity, as gasoline needs
– Always inspect the chainsaw before use. Replace damaged room to expand when temperatures rise.
parts. Check for fuel leaks. Make sure all fasteners are in – Store gasoline only in fuel containers specifically designed and
place and secure. Replace parts that are cracked, chipped, or approved for the storage of gasoline.
damaged.
– Always stop the engine and allow it to cool before filling the
– Do not operate the chainsaw with loose or damaged parts. fuel tank. Never remove the fuel tank cap or add fuel when the
– Always be aware of risk of injury to the head, hands and feet. engine is hot. Always loosen the fuel tank cap slowly to relieve
any pressure in the fuel tank before fueling.
– Carefully inspect the area before starting the chainsaw.
Remove rocks, broken glass, nails, wire, string and other – Always mix and add fuel in a clean, well-ventilated outdoor
objects that may be thrown or become entangled with the area where there are no sparks or flames. DO NOT smoke.
chainsaw. – Never operate the chainsaw without the fuel cap securely in
– Clear the area of children, bystanders and pets; keep them place.
outside a 50 ft. (15m) radius, at a minimum. Even then, they – Avoid creating a source of ignition for spilled fuel. Wipe up any
are still at risk from thrown objects and falling branches. spilled fuel from the chainsaw immediately, before starting the
Encourage bystanders to wear eye protection. If you are chainsaw. Move the chainsaw at least 50 ft. (15 m) from the
approached, stop the chainsaw immediately. fueling source location before starting the chainsaw. DO NOT
– Squeeze the throttle control and check that it returns smoke.
automatically to the idle position. – Never start or run the chainsaw inside a closed room or
– Make adjustments or repairs before using the chainsaw. building. Breathing exhaust fumes can kill. Operate this
chainsaw only in a well ventilated outdoor area.
While Operating
– When a chainsaw is being used, a fire extinguisher should be
readily available.
– Wear safety glasses or goggles that meet current ANSI Z87.1
standards and are marked as such.
Wear ear/hearing protection when operating this chainsaw.
Wear a face mask or dust mask if the operation is dusty. Use a
hard hat or other type of safety helmet.
4100641 - Chainsaw Important Safety Instructions
– Wear safety boots and protective gloves. – Keep the chainsaw clean. Carefully remove vegetation and
Wear heavy, snug fitting clothes, including long pants and a other debris that could block moving parts.
long-sleeve shirt. – To reduce fire hazard, replace a faulty muffler and spark
Do not wear loose clothing, jewelry, short pants, sandals or go arrestor. Keep the engine and muffler free from grass, leaves,
barefoot. excessive grease or carbon build up.
Always secure hair above shoulder level.
– If the chainsaw starts to vibrate abnormally, stop the chainsaw
– Make sure the saw chain is not in contact with anything before immediately. Inspect the chainsaw for the cause of the
starting the chainsaw. vibration. Vibration is generally an indicator of trouble.
– Use the chainsaw only in daylight or good artificial light. – Keep the work area clean. Cluttered areas invite injuries.
– Avoid accidental starting. Be in the starting position whenever Do not start cutting until the work area is clear and free from
pulling the starter rope. The operator and chainsaw must be in obstructions. Make sure there is secure footing and a planned
a stable position while starting. Refer to Starting and Stopping retreat path from falling trees or branches.
instructions. – Do not cut near electrical cables or power lines. Keep at least
– Only use this chainsaw for its intended purpose: to cut wood. 50 ft. (15 m) away from all power lines.
Do not use the chainsaw for cutting plastic, masonry or – For safer, more effective performance, make sure the guide
other non-wood building materials. Only use the chainsaw as bar and chain are properly cleaned, lubricated, tightened and
described in this manual. sharpened. Check the guide bar and chain at frequent intervals
– Keep all body parts away from the saw chain when the for proper adjustment.
chainsaw is running. Do not touch or try to stop moving parts – When cutting a limb that is under tension, use extreme
with your hands. caution. When the tension is released, the limb could spring
– When carrying a chainsaw with the engine running, always back and strike the operator, causing severe injury or death.
engage the chain brake. – Use extreme caution when cutting small-sized brush and
– Do not touch the engine or muffler. These parts get extremely saplings, as slender material may catch the saw chain and be
hot from operation, even after the chainsaw is turned off. whipped toward the operator or pull the operator off balance.
– Do not operate the chainsaw faster than the speed needed to – This saw is classified by UL as a Class 1C saw in accordance
do the job. Do not run the chainsaw at high speed when not in with CSA Z62.1-03. It is intended for infrequent use by
use. homeowners, cottagers and campers, and for general
– Do not force the chainsaw, especially near the end of a cut. applications such as clearing, pruning, cutting firewood, etc.
It will do a better, safer job when used at the intended rate of It is not intended for prolonged use. If the intended use
speed. involves prolonged periods of operation, this may cause
circulatory problems in the user’s hands due to vibration.
– Always turn the engine off when operation is delayed, or when
setting the chainsaw down or when carrying the chainsaw – Do not operate the chainsaw in a tree or on a ladder unless
from one location to another. Make sure all moving parts come specifically trained to do so.
to a complete stop. – Never remove, modify or make inoperative any safety device
– Carry the chainsaw by the front handle with the muffler furnished with the chainsaw.
positioned away from the body and the guide bar positioned to – Do not use the chainsaw in the presence of flammable liquids
the rear. Cover the guide bar and saw chain with the scabbard or gases.
when carrying the chainsaw. – Do not attempt operations beyond the operator’s capacity or
– If you strike or become entangled with a foreign object, stop experience.
the chainsaw immediately and check for damage. Do not – Do not operate a chainsaw that is damaged, improperly
operate the chainsaw before repairing damage. Do not operate adjusted or not completely and securely assembled. Make sure
the chainsaw with loose or damaged parts. moving parts stop when the throttle control trigger is released
– Use only original equipment manufacturer (OEM) replacement or the chainsaw is turned off. Do not use the chainsaw if
parts and accessories for this chainsaw. These are available it does not turn on and off properly. Have defective parts
from Champion or other qualified service dealer. Use of any replaced by Champion or other qualified service dealer.
other parts or accessories could lead to serious injury to the
user, or damage to the chainsaw, and void the warranty.
5Saw Chain
Direction
Fig. A
100641 - Chainsaw Important Safety Instructions
Kickback Safety Pinch
WARNING
Kickback may occur when the nose or tip of the guide bar
touches an object, or when the wood closes in and pinches
the saw chain in the cut. In some cases, tip contact may cause
a lightening-fast reverse action, kicking the guide bar rapidly Linear
Kickback
back towards the operator. Pinching the saw chain along
Fig. B
the top of the guide bar may push the guide bar rapidly back Figure B
towards the operator. Either of these reactions may cause
Kickback Safety Precautions
a loss of control over the saw, which could result in serious
injury to the user. Contact with foreign objects within the wood Take the following steps to reduce the chance of accident or
can also induce a loss of chain saw control. injury:
– Do not rely exclusively upon the safety devices built into the
Understanding Kickback chainsaw.
A basic understanding of kickback can help reduce or eliminate – Do not cut above shoulder height.
the element of surprise and the chance of kickback-related injury.
– Do not over reach. Always keep proper footing and balance.
Sudden surprise contributes to accidents.
Take extra care when working on steep slopes or inclines.
– Rotational Kickback can happen when the upper tip of
– Do not make cuts with the tip of the guide bar.
the guide bar contacts an object while the chain is moving
(Fig. A). This can cause the chain to dig into the object and – Make sure the area of operation is free from obstructions.
momentarily stop moving. The guide bar is then kicked up and Do not let the tip of the guide bar contact any object, such as a
back toward the operator in a lightning-fast reverse reaction. log, branch, the ground or other obstruction.
– Linear Kickback can happen when the wood on either side – Always inspect the wood before cutting. Foreign objects could
of a cut closes in and pinches the moving saw chain along damage the chainsaw or cause serious personal injury. Never
the top of the guide bar (Fig. B). This can cause the chain cut through nails, metal rods, railroad ties or pallets.
to instantly stop. The chain force is then reversed, causing – Do not operate the chainsaw with one hand! Serious injury to
the saw to move in the opposite direction, sending the saw the operator, helpers or bystanders may result from one-
straight back toward the operator. handed operation. This chainsaw is intended for two-handed
– Pull-In can happen when the moving chain on the bottom use. Always grip the chainsaw firmly with both hands when
of the guide bar hits a foreign object inside the wood. This the chainsaw is running. Hold the front handle with the left
can cause the chain to suddenly stop. The saw is then pulled hand and the rear handle with the right hand. Firmly encircle
forward and away from the operator, which could potentially the handles with the thumbs and fingers. Do not let go. A firm
result in the loss of control of the saw. grip will help maintain control of the chainsaw and reduce the
chance of kickback.
Rotational
Kickback
– Stand slightly to the left of the chainsaw to avoid being in the
direct line of the saw chain.
– Never start the saw when the guide bar is inside an existing
cut. Be extremely careful when re-entering a cut.
Kickback
Danger Zone – Always begin a cut with the chainsaw running at full speed.
Saw Chain Fully squeeze the throttle control and maintain a steady cutting
Direction speed. Slower speeds increase the chance of kickback.
Fig. A
Figure A – Keep the saw housing pressed firmly against the wood.
– Do not cut more than one log or branch at a time.
Pinch
– Do not twist the chainsaw when removing the guide bar from
a cut.
– Watch out for shifting objects (logs, branches, etc.) that might
pinch or fall onto the saw chain during operation.
Linear 6
Kickback100641 - Chainsaw Important Safety Instructions
– Only use wedges made of wood or plastic. Do not use metal to – Secure the chainsaw while transporting.
hold a cut open. – Always use the scabbard on the guide bar and saw chain
– Follow the manufacturer’s sharpening and maintenance during transportation and storage.
instructions for the saw chain. – Always store the chainsaw and fuel in a cool, dry and well-
– Only use replacement bars and chains specified by the ventilated space. Do not store fuel, or a chainsaw with fuel in
manufacturer or the equivalent. These are available from the tank, indoors where fumes may reach open flames (pilot
Champion or other qualified service dealer. Use of any lights, etc.) or sparks (switches, electrical motors, etc.).
unauthorized parts or accessories could lead to serious injury – Store the chainsaw in a dry place, secured or at a height to
to the operator or damage to the chainsaw and will void the prevent unauthorized use or damage. Keep the chainsaw out of
warranty. the reach of children.
– Use devices that reduce the risks associated with – Never douse or squirt the chainsaw with water or any other
kickback,such as low-kickback chains, guide bar nose guards, liquid. Keep handles dry, clean and free from debris, oil,
chain brakes and low-kickback guide bars. There are no other fuel and grease. Clean the chainsaw after each use. Refer
replacement components for achieving kickback protection in to Cleaning and Storage. Do not use solvents or strong
accordance with CSA Z62.3. detergents.
– A low-kickback saw chain is a chain that has met the kickback – Keep these instructions. Refer to them often and use them
performance requirements of ANSI/OPEI B175.1-2012 to instruct other users. If you loan this chainsaw to others, also
when tested according to the provisions specified in ANSI/ loan them these instructions.
OPEIB175.1-2012. A low-kickback saw chain is a chain that is
also in accordance with CSA Z62.3. Do not use a replacement
WARNING
saw chain unless it has met these requirements for this
specific model or has been designated as a low-kickback This spark ignition system complies with the Canadian
replacement saw chain in accordance with ANSI/OPEI B175.1- standard ICES-002
2012. As saw chains are sharpened, some of the low-kickback
qualities are lost and extra caution should be used.
NOTICE
– Do not install a bow guide on this chainsaw. Bow guides have
larger kickback zones, which increase the chance of kickback For users on U.S. Forest Land and in the states of
and serious injury. This increase is not significantly reduced California, Maine, Oregon and Washington. All U.S.
by using a low-kickback saw chain. Using a bow guide on this Forest Land and the state of California (Public Resources
chainsaw is extremely dangerous. Codes 4442 and 4443), Oregon and Washington require, by
law that certain internal combustion engines operated on
forest brush and/or grass-covered areas be equipped with
Other Safety Warnings
a spark arrestor, maintained in effective working order, or
the engine be constructed, equipped and maintained for the
WARNING prevention of fire. Check with your state or local authorities
– Follow all maintenance instructions in this manual. for regulations pertaining to these requirements. Failure to
follow these requirements could subject you to liability or a
– All service, other than the maintenance procedures
fine. This chainsaw is factory equipped with a spark arrestor.
described in this manual, should be performed by a
Replacement requires a Muffler Assembly, installed at a
Champion qualified service dealer.
Champion Parts & Repair Service Center.
– Do not use the chainsaw if it is not working correctly, has
been dropped, damaged, left outdoors or dropped into
water. Have the chainsaw serviced by a Champion qualified
service dealer.
Before inspecting, servicing, cleaning, storing, transporting or
replacing any parts on the chainsaw:
1. Stop the chainsaw.
2. Make sure all moving parts have stopped.
3. Allow the chainsaw to cool.
4. Disconnect the spark plug wire.
7100641 - Chainsaw Important Safety Instructions
Safety Labels
These labels warn you of potential hazards that can cause serious injury. Read them carefully.
If a label comes off or becomes hard to read, contact Technical Support Team for possible replacement.
A
B
C
Top view
LABEL DESCRIPTION
WARNING AVERTISSEMENT
− Only use approved bar and chain combination.
− Bar/Chain Oregon, type 188PXBK095 / 21BPX072X.
− Sprocket (teeth × pitch): 7T × 0.325 in.
− Class 1C
− Use of non-approved bar, chain or sprocket will void
warranty, damage the saw and could cause physical
A 45
harm.
− Utilisez uniquement la combinaison de barre et de
Safety Symbols
chaîne approuvée.
− Bar / Chaîne Oregon, type 188PXBK095 / 21BPX072X.
− Pignon (dents × pas) : 7T × 0,325 po.
1687-L-SF-D
− Clase 1C
− L’utilisation d’une barre, d’une chaine ou d’un
pignon non approuve annulera la garantie,
endommargera la scie et pourrait causer des
blessures.
12039 SMITH AVENUE, SANTA FE SPRINGS,
CHAMPION POWER EQUIPMENT, INC.
MADE IN CHINA / FABRIQUÉ EN CHINE
CA 90670, USA / É.-U. 1-877-338-0999
MODEL
MODÉLE LPN 100XXX
1687-L-SF Colors
B SERIAL NO.
Rev D
Dataplate
N° DE SÉRIE XXXXXXXXXXXX
MANUFACTURE DATE Size 45 XXXX
x 33 mm K 152 485 2945 ---
DATE DE FABRICATION
Conforms to / Obéir à OPEI B175.1
5005032
Artwork Notes Revision Changes
Certified to / Certifier à CSA z62.1. z62.3
1696-L-PR-A
3mm corner radius; 2mm safe margin; to be printed B -revised lineart.
on white substrate C-change 21BPX072X to 91P062X
D-change back to 21BPX072X
10-20X
1-4X
This artwork belongs to Champion Power Equipment. The contents are confidential and privileged and shall not be disclosed to or used by or for
C 1
outside parties without 2
the explicit 3
consent 4
of Champion
WARNING
LPNEquipment.
Power 1696-L-PR
AVERTISSEMENT
Always wear protective gear.
Colors
Read operator’s manual
Quick Start
1-4X Rev ADo not wear loose fitting clothing. / before operating saw. / Lisez
Portez toujoursde l’équipement de le manuel d’utilisation avant
5 6 7 8 9 Size
protection. Ne portez pas de
70 x 35 mm K --- --- la---
d’utiliser scie. ---
Made in China / Fabriqué en Chine vêtements amples. 1693-L-OP-B
Artwork Notes Revision Changes
2mm safe margin; to be printed on security ---
substrate; magenta text should be filled in during
time of production.
This artwork belongs to Champion Power Equipment. The contents are confidential and privileged and shall not be disclosed to or used by or for
8
outside parties without the explicit consent of Champion Power Equipment.100641 - Chainsaw Important Safety Instructions
Safety Symbols
Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper interpretation of these
symbols will allow you to more safely operate the product.
SYMBOL MEANING
Read Operator’s Manual. To reduce the risk of injury, user must read and understand operator’s
manual before using this product.
Eye and Ear Protection. Always wear safety goggles or safety glasses with side shields, and as
necessary a full face-shield as well as full ear protection when operating this product.
Kickback. Contact of the guide bar tip with any object should be avoided. Tip contact may cause
the guide bar to move suddenly upward and backward, which may cause serious injury.
CKA. Computed kickback angle (CKA) listed represents angle of kickback your bar and chain will
have when tested in accordance with CSA (Canadian Standards Association) and ANSI standards.
The bar and chain combination meet kickback requirements of CSA Standards Z62.1, Z62.3, &
ANSI/OPEI B175.1 when used as shown in Specifications. Use of bar and chain combinations
other than those listed is not recommended and may not meet the CKA requirements per
standard.
Use Both Hands. Always use both hands while operating the chainsaw. Never use only one hand
to operate the chainsaw.
Chain Direction. Make sure the saw chain faces the direction shown when installed on the guide
bar. Refer to Installing the Guide Bar and Saw Chain in the Maintenance section.
9100641 - Chainsaw Important Safety Instructions
Quickstart Label Symbols
Some of the following symbols may be used on this product. Please study them and learn their meaning. Proper interpretation of these
symbols will allow you to more safely operate the product.
10-20X
1-4X
WARNING AVERTISSEMEN
1 2 3 4
Always wear protective gear.
1-4X Do not wear loose fitting clothin
Portez toujoursde l’équipement
5 6 7 8 9 protection. Ne portez pas de
Made in China / Fabriqué en Chine vêtements amples.
Starting the Engine
1. Make sure chain break is engaged.
2. Push the purge bulb at least 10-20 times, or until bulb is full
of fuel.
3. Pull the choke knob out until a “click” is heard.
4. Pull the starter rope rapidly 1-4 times or until the engine
pops.
5. Push the choke knob in. LPN 1693-L-OP
6. Pull the starter rope rapidly 1-4 times to start the engine. If Rev B
the engine does not start, repeat steps 3-6.
Size 26 x 126 mm K
7. When engine starts, ensure the choke knob is pushed in and
press and hold the throttle lockout and lightly squeeze the
throttle to idle the engine. Artwork Notes Revision
8. Allow the engine to warm up for 30-60 seconds.
2mm safe margin; to be printed on white substrate. ---
9. Carefully disengage the chain brake.
This artwork belongs to Champion Power Equipment. The contents are confidential and privileged and shall
outside parties without the explicit consent of Champion Power Equipment.
10100641 - Chainsaw Controls and Features
CONTROLS AND FEATURES
Read this operator’s manual before operating your chainsaw. Familiarize yourself with the location and function of the controls and
features. Save this manual for future reference.
Chainsaw
3 4
5
1 2
6
7
8
9
14 13 12 11 10
15
16 17
1. Guide Bar 10. Throttle Trigger
2. Saw Chain 11. Engine Switch
3. Front Hand Guard and Chain Brake Lever 12. Fuel Tank
4. Front Handle 13. Starter Handle
5. Air Filter Cover 14. Bar and Chain Oil Tank
6. Air Cleaner Cover Knob 15. Purge Bulb
7. Choke Knob 16. Clutch Cover
8. Throttle Trigger Lockout 17. Chain Tensioning Screw
9. Rear Handle
11100641 - Chainsaw Controls and Features
Safety Features
1. Low-Kickback Saw Chain – significantly reduces the 5. On/Off Switch – immediately stops the engine when moved
chance of kickback and the intensity of kickback, due to to the off position. The ON/OFF ignition switch automatically
specially designed depth gauges and guard links. springs back to the ON position to be ready to start the
2. Spark Arrester Screen – retains carbon and other engine for next use.
flammable particles over 0.023 inches (0.6 mm) in size from 6. Throttle Lockout – prevents accidental acceleration of the
the engine exhaust flow. Compliance with local, state and engine. The throttle control cannot be squeezed unless the
federal laws and/or regulations governing the use of a spark throttle lockout is depressed.
arrester screen is the user’s responsibility. Refer to spark 7. Chain Catcher – reduces the chance of injury if the saw
arrestor note in the safety section for additional information. chain breaks or derails during operation. The chain catcher is
3. Chain Brake Lever / Front Hand Guard – helps protects the designed to intercept a whipping chain.
operator’s left hand if it slips off the front handle while the
chainsaw is running. The chain brake lever is also used to
manually engage the chain brake.
4. Chain Brake – reduces the chance of injury if kickback
occurs, by stopping the saw chain in milliseconds. The chain
brake is designed to engage automatically in response to
kickback. The chain brake can also be activated by pushing
the chain brake lever forward, either intentionally or if the
operator’s hand strikes the lever during kickback.
12100641 - Chainsaw Assembly
ASSEMBLY Oil and Fuel Mixing Instructions
The use of old and/or improperly mixed fuel is the most common
Adding Bar and Chain Oil: Initial Use cause of performance problems. Use only fresh, clean unleaded
gasoline. Follow the instructions carefully for the proper gasoline/
This chainsaw comes from the factory with the chain oil reservoir
oil mixture.
empty. Refer to Adding Bar and Chain Oil instructions in the
Maintenance section. The chainsaw engine works with 10% or less ethanol blended
gasoline. When using ethanol-gasoline blends there are some
Adjusting the Chain Tension: Initial Use issues worth noting:
– Ethanol-gasoline blends can absorb more water than gasoline
The saw chain must be properly tensioned before attempting
alone.
to start or operate the chainsaw. The saw chain may also
require additional tensioning as the saw chain heats up during – These ethanol blends can eventually separate, leaving water
operation. Refer to Adjusting the Chain Tension instructions in the or a watery goo in the fuel tank, fuel lines, fuel filter and the
Maintenance section. carburetor. This compromised gasoline can be drawn into the
carburetor and cause damage to the engine and or create
Testing the Chain Brake
potential hazards.
WARNING – Any damages or hazards caused by using ethanol blended
gasoline higher than 10% by volume, improperly stored
Always activate the chain brake slowly and deliberately. Keep gasoline, and/or improperly formulated stabilizers, are not
the saw chain from touching anything. Do not let the chain saw covered by the manufacturer’s warranty.
tip forward.
– When a fuel stabilizer is used, confirm that it is formulated to
work with ethanol-blended gasoline.
Always test the chain brake before using the chainsaw.
– It is recommended to drain the fuel after each use and run the
1. Set the chainsaw on a flat, level surface.
engine to starvation. See Storage instructions for extended
2. Make sure the chain brake lever is pulled back in the non-use.
disengaged position (Fig. 1).
3. Start the chainsaw. Refer to Starting Instructions in the WARNING
Starting and Stopping section. Maintain a proper grip. Refer DO NOT use E15 fuel in this chainsaw.
to Holding the Chainsaw in the Operation section.
Using fuel containing greater than 10% ethanol will damage
4. While the chainsaw is running, squeeze the throttle control
this engine and void the warranty. Always use E10 or less to
to 1/3 throttle and then engage the chain brake by pushing
protect the engine’s power.
the chain brake lever forward with the left hand (Fig. 1). The
chain should stop moving abruptly.
IF... If the chain stops moving, the chain brake is working Using Fuel Additives
correctly. Always use a 2-cycle oil designed for air-cooled engines and
IF... If the chain does not stop moving, have the chainsaw mix it with a fuel additive, such as STA-BIL Fuel Stabilizer or an
serviced by Champion or other qualified service dealer. equivalent. Add 0.8 oz. (23mL) of fuel additive per gallon of fuel,
5. Stop the engine and return the chain brake to the disengaged according to the instructions on the container. NEVER add fuel
position. Refer to Stopping Instructions in the Starting and additives directly to the chainsaw’s fuel tank.
Stopping section. Mixing the Fuel
NOTICE
Disengaged Engaged
For proper engine operation and maximum reliability, pay strict
attention to the gasoline and oil mixing instructions on the
Chain Brake Lever 2-cycle oil bottle. Using improperly mixed fuel can severely
damage the engine.
Figure 1
13100641 - Chainsaw Operation
Thoroughly mix the proper ratio of unleaded gasoline with 2-cycle 4. Wipe up any fuel that may have spilled.
engine oil. Do not mix them directly in the chainsaw’s fuel tank. 5. Reinstall the fuel cap.
Use a separate fuel can. Use a 35:1-40:1 gasoline/oil ratio. See
the table below for specific gasoline and oil mixing ratios. 6. Move the chainsaw at least 50 ft. (15 m) from the fuel
container and the fueling site before starting the engine.
MIXING RATIO - 35:1-40:1
OPERATION
Starting and Stopping
Unleaded gasoline 2-cycle oil
1 gallon U.S. 3.7 fl. oz. WARNING
(3.8 L) (108.7 mL)
1L 28.6 mL When fueling or using your chainsaw, a fire extinguisher should
be available.
WARNING WARNING
Gasoline is extremely flammable. Ignited vapors may explode. Operate this chainsaw only in a well-ventilated outdoor area.
Always stop the engine and allow it to cool before filling the Carbon monoxide exhaust fumes can be lethal in a confined
fuel tank. Do not smoke while filling the tank. Keep sparks and area.
open flames at a distance from the area.
WARNING
WARNING
Avoid accidentally starting the chainsaw. To avoid serious
Remove the fuel cap slowly to avoid injury from fuel spray. injury, the operator and the chainsaw must be in a stable
Never operate the chainsaw without the fuel cap securely in position when pulling the starter rope (Fig. 5).
place.
WARNING
WARNING
Never operate the chainsaw without the guide bar and saw
Add fuel in a clean, well ventilated outdoor area. Wipe up any chain properly installed. Make sure the bar-retaining nuts are
spilled fuel immediately. Avoid creating a source of ignition for tight and the guide bar cover is securely assembled. Make
spilled fuel. Do not start the engine until fuel vapors dissipate. sure the saw chain is properly tensioned.
1. Position the chainsaw with the fuel cap facing up.
WARNING
2. Remove the fuel cap (Fig. 2).
The saw chain will spin after the engine starts. Keep hands
and feet clear of the saw chain and do not allow the saw chain
to contact any object(s).
Fuel
Before Starting the Chainsaw
A. Mix gasoline with oil. Refer to Oil and Fuel Mixing Instructions.
B. Fill the fuel tank. Refer to Fueling the Chainsaw.
C. Fill the chain oil reservoir with bar and chain oil. Refer to
Adding Bar and Chain Oil in the Maintenance section.
Figure 2 Starting Instructions
3. Place the fuel container spout into the fill hole on the fuel 1. Make sure the chain brake is engaged. Refer to Testing the
tank and slowly fill the tank to avoid overfill and spill. Fuel can Chain Brake in the Assembly section.
expand after filling. A minimum of ¼ in. (6.4 mm) of space left
in the tank is required for fuel expansion, although more than
¼ in. (6.4 mm) is recommended. Fuel can be forced out of the
tank as a result of expansion if overfilled, and can affect the
stable running condition of the chainsaw.
14100641 - Chainsaw Operation
2. First time use, or after sitting unused for 3 or more months, 4. DO NOT touch the throttle control (Fig. 3). Set the chainsaw
slowly push the PURGE bulb all the way in and release 20 on a flat, level surface. Crouch in the starting position (Fig.
times (Fig. 4). For starting after recent use, push the PURGE 5) or bend over. Hold the front handle with the left hand. Hold
bulb 10 times. If fuel cannot be seen in the purge bulb, push the starter rope grip with the right hand. Insert the right foot
and release the purge bulb until fuel is visible, and then into the boot loop to help hold the chainsaw firmly in place.
push 5 more times to purge air and vapor bubbles out of the Pull the starter rope rapidly until the engine pops or putters,
carburetor. or up to 4 times if you do not hear or feel the engine putter.
The engine may start on this step, if not proceed to next step.
NOTICE
The PURGE bulb is not used to squirt or prime gasoline into the
Starting Position
engine’s air intake. It simply pushes fuel into the carburetor
pump to “purge” air bubbles and fuel vapor out of the pump.
The longer the chainsaw has been left unused, the more
pumps it will take to fill the bulb and purge the system. You
cannot flood the engine by pushing the PURGE bulb. Starter
Rope Grip
On (I) / Start Boot loop
Off (0) / Stop
Figure 5
Throttle Control
Throttle Lockout
WARNING
Clear the area of any objects that could contact the saw chain.
Always wear heavy padded gloves.
5. DO NOT touch the throttle control. After the engine pops or
putters, then push the choke knob in to position 2
“RUN” . In position 2, the choke is open, and the throttle is
Figure 3 cracked open to the starting position. (Fig. 4).
6. Pull the starter rope rapidly 1-4 times to start the engine. If
the engine does not start, repeat steps 3-6.
7. When engine starts, make sure choke knob is pushed in to
position 2 “RUN”. Press and hold the throttle lockout. Lightly
squeeze and release the throttle control to release the choke
Position 1 (out) Position 2 (in) automatically and idle the engine.
Choke Knob 8. Allow the engine to warm up for 30 to 60 seconds.
9. Carefully disengage the chain brake.
Purge Bulb
WARNING
The saw chain should not move when the engine runs at
idle. If it does move, refer to Adjusting the Idle Speed in the
Figure 4 Maintenance section.
3. Pull the choke knob out to position 1 “CHOKE” until it
locks in place and you feel and hear the click. (Fig. 4). 10. To reduce the chance of injury, engage the chain brake until
you are ready to begin operation. When ready, disengage the
chain brake. Then press the throttle lockout and squeeze the
throttle control to accelerate the engine, as needed.
15100641 - Chainsaw Operation
NOTICE WARNING
The engine is properly warmed up when it accelerates without Make sure the chain oil reservoir is full before operation.
hesitation. Check the oil level periodically so that it does not drop below
half full. Make sure the chain oil adjustment screw is set
IF... the engine hesitates, continue the warm-up. appropriately. Refer to Setting the Chain Oil Adjustment
Screw in the Maintenance section. The saw chain must be
IF... the engine does not start, repeat Step 2 to purge 10 times and
continuously coated with oil to function properly.
try starting procedure again.
IF... the engine fails to start after a few attempts, pull the choke
knob out to position 1 and then push the choke knob back in WARNING
to position 2, so that the throttle will be set in a partially open Always wear appropriate eye, hearing, hand, foot and body
position. Pull the starter rope with a quick and rapid motion 3 protection to reduce the risk of injury when operating this
to 8 times. The engine should start. If it does not, repeat this chainsaw. Wear head protection. Use a full face shield.
instruction. Refer to the Safety section for appropriate safety equipment
IF... the engine is already warm, press the purge bulb 10 times, information.
pull the choke knob out to position 1 and then push the choke
knob back in to position 2. Pull starter rope with a quick and rapid
motion 3-8 times. The engine should start. If it does not, press the Tips for Best Results
purge bulb 20 times until bulb is 60%-75% full of fuel, and then – Follow all safety instructions. Refer to the Safety section.
repeat this instruction.
– Only cut wood and materials made of wood. Do not attempt
WARNING to cut sheet metal, plastics, masonry or any other non-wood
materials.
The engine may begin to creep up idle speed and intermittently
– Practice cutting a few small logs before beginning a major
turn the chain for 1-2 minutes as the engine runs out of fuel.
cutting operation.
Stop the saw and refuel to return idle speed to normal to stop
chain from creeping. – Do not attempt to cut trees or logs with diameters larger than
32 in. (81.3cm).
WARNING
Preparing the Work Area
When carrying a chainsaw with engine running, always engage
the chain brake. WARNING
When fueling or using your chainsaw, a fire extinguisher should
Stopping Instructions
be available.
1. Release the throttle control and allow the engine to idle.
2. To stop the engine, depress and hold the STOP switch (Fig. 3) – Clear the area of children, bystanders and pets; keep them
to the stop position. outside a 50 ft. (15 m) radius, at a minimum. Even then, they
are still at risk from thrown objects. Encourage bystanders to
Emergency Stopping
wear eye protection. If you are approached, stop the chainsaw
1. Push the chain brake lever forward to engage the chain immediately. When felling, the safe distance is at least twice
brake. Refer to Testing the Chain Brake in the Assembly the height of the tallest tree in the work area. When bucking,
section. keep workers at least 15 feet (4.6 m) apart.
2. Depress and hold the STOP switch to the stop position. – Keep the work area clean. Cluttered areas invite injuries.
Do not start cutting until the work area is clear and free from
WARNING obstructions. Make sure there is secure footing and a planned
retreat path from falling trees or branches.
Always check the chain tension and adjust as necessary
before beginning operation. Refer to Adjusting the Chain – Do not cut near electrical cables or power lines. Keep at least
Tension in the Maintenance section. 50 feet (15 m) away from all power lines.
– Use the chainsaw only in daylight or good artificial light.
16100641 - Chainsaw Operation
Holding the Chainsaw
Chain line
WARNING
When carrying a chainsaw with engine running, always engage
the chain brake.
WARNING Incorrect Stance
Always hold the front handle with the left hand and the rear
handle with the right hand. Always keep all body parts to the Figure 8
left of the chain line.
Wedges and Recommended Tools
– Firmly encircle the handles with the thumbs and fingers – WEDGES: Make sure to always have plastic felling wedges
(Fig. 6). This will help reduce the chance of losing control of on your person to use when felling trees and bucking fallen
the chainsaw if kickback occurs. Any grip with thumbs and logs. OSHA requires operators of chainsaws to always have
fingers on the same side of the handles is dangerous. felling wedges on their person to be able to quickly react if
– Always grip the chainsaw firmly with both hands when the cut begins to close on chain and to help guide tree in desired
chainsaw is running. fall direction. Use the felling wedges to keep the cut open to
prevent the chain from being pinched in the cut. Pinching the
– Hold the front handle with the left hand. Keep the left arm
chain in the cut can lead to the chain derailing. Save yourself
straight to help withstand potential kickback.
the grief and hassle of pinched & derailed chains by using use
– Hold the rear handle with the right hand. Keep the right arm plastic felling wedges.
slightly bent.
– AXE OR HATCHET: Use back side of axe or hatchet to pound
– Use these hand placements whether the operator is left- felling wedges into cut to prevent pinch and to direct the
handed or right-handed. This will help keep the operator desired fall direction. Use cutting edge to clear cutting work
slightly to the left of the chainsaw and out of the direct line of area by trimming off springy branches along trunk that may be
the chain saw if kickback occurs (Fig. 7 and Fig. 8). prone to spring into your face or snag into chain.
– Stand in a stable position with feet apart and firmly planted. – HELMET WITH FACE SHIELD: Protect your head and face from
– Do not cut above shoulder height. Do not over reach. contact with chain from kickback and falling branches. Face
shield keeps saw dust out of your eyes.
Correct Grip – EARMUFFS: Protect your hearing.
– PADDED GLOVES: Protect your hands from sharp chain, wood
splinters, and circulation damage from vibration exposure.
– CHAPS: Protect your legs and major arteries from contact with
chain with multi layered chainsaw chaps. Chaps also have
pockets to keep your plastic felling wedges on hand in case of
emergency.
Thumbs below the handles – TIMBER JACK: Use 1 or 2 timber jacks to easily grab and lift
Figure 6 fallen trees and logs off the ground to put in safe position to
prevent pinching chain, to prevent chain from hitting ground,
and at a more comfortable cutting height.
Chain line
– FRAMING SQUARE: Use a large 24” x 16” framing square to
sight the notch fall direction to make sure the tree is aimed in
desired direction.
– FILES: Files are required to sharpen the chain cutters: Ø 3/16”
round file and file guide. Flat file. Depth gauge.
Correct Stance
– GREASE GUN: Use a grease gun to lubricate the front sprocket
in the bar.
Figure 7
17100641 - Chainsaw Operation
Cutting Procedure Basics – Stay uphill from the tree; it will most likely roll or slide after it
falls.
1. Start the chainsaw. Refer to Starting Instructions in the
Starting and Stopping section.
135° from planned
2. Keep your fingers off the throttle control until you are ready to line of fall
make a cut.
3. Accelerate the chainsaw to full speed before cutting. Path of Planned line
safe retreat 90°
of fall
4. Press the chainsaw against the wood and maintain a firm,
steady pressure through most of the cut. Do not put pressure
135° from planned
on the chainsaw at the end of the cut.
line of fall
5. Maintain a steady speed throughout the cut. Keep the
chainsaw running through the entire cut. Figure 9
6. Do not try to force the saw through the wood. Allow the saw
chain to do the cutting. Exert only light pressure. Forcing the Felling: Procedure
cut could result in damage to the chainsaw or personal injury.
Small trees, up to 6 - 7 inches (15 - 18 cm) in diameter, are
7. Release the throttle control as soon as the cut is completed. usually felled in a single cut. Larger trees require a sequence of
Allow the saw chain to come to a complete stop. The saw two cutting operations: a notched undercut followed by a felling
chain, guide bar and engine may experience unnecessary back cut. It may also be necessary to remove buttress roots.
wear if the chainsaw is run without a cutting load.
Step 1: Removing Buttress Roots
Felling: Safety Buttress roots are large roots that extend above the ground and
help support the tree. If the tree has large buttress roots that
Felling is the process of cutting down a tree. Follow these safety might impede the felling process, follow these steps to remove
precautions to reduce the risk of serious injury, property damage them:
and damage to electrical lines:
1. Make a horizontal cut into the buttress root (Fig. 10). To
– Do not fell trees with an extreme lean. Do not fell trees with prevent the guide bar from being pinched by the weight of the
rotten limbs, loose bark or hollow trunks. Have these trees wood, always make this cut first.
pushed or dragged down with heavy equipment.
2. Make a vertical cut into the buttress root (Fig. 10).
– Do not cut trees near buildings or electrical lines. Leave these
operations for professionals. If a felled tree does contact an
Second cut
electrical line, notify the utility company immediately.
Buttress root
– Check the tree for damaged or dead branches that could fall
and cause serious injury.
First cut
– Remove dirt, stones, loose bark, nails, wire and other
obstructions from the portion of the tree that will be cut.
– When bucking and felling operations are performed by two
or more persons in the same general area, they should be
separated from each other by a distance of at least twice the
Figure 10
height of the tree to be felled.
3. Remove the loose section from the work area.
– Consider the force and direction of the wind. Consider the
lean and balance of the tree. Consider the location of large Step 2: Making the Notched Undercut
branches. All of these factors influence the direction that the
tree will fall. Do not try to fell a tree in a direction other than its WARNING
natural fall line.
Never walk in front of a tree with a notched undercut.
– Do not fell trees during periods of precipitation or high winds.
– Determine a safe and expedient escape route. Clear the area This cut determines which direction the tree will fall. Always make
around the tree and make sure there are no obstructions this cut on the side of the tree facing the direction where the tree
blocking the escape route. Establish a 90º corridor of escape, should fall. Make the cut at 90º to the line of fall.
approximately 135º from the line of fall (Fig. 9).
18100641 - Chainsaw Operation
1. Make a horizontal cut into the trunk of the tree (Fig. 11). 3. Periodically glance up during the felling back cut to see if
The cut should be about 1/3 the diameter of the tree and the tree is going to fall in the correct direction. If there is a
close to the ground. To prevent the guide bar from being chance that the tree might not fall in the desired direction, or
pinched by the weight of the wood, always make this cut first. if the tree might rock back and bind the chain saw, remove
2. Make a 45º cut into the trunk of the tree, above the first cut the guide bar from the cut, stop the chainsaw and use
(Fig. 11). Continue cutting until the two cuts meet. wedges to open the cut and direct the fall (Fig. 13). Only use
soft plastic or wooden wedges. Drive the wedges into the
3. Remove the loose section from the work area. cut slowly. Once the wedges are in place and the cut is held
open, either carefully reinsert the guide bar and continue
Direction of fall the cut or slowly drive the wedges in further to push the tree
over.
Second cut
1/3 diameter Notched undercut
First cut Wedge
Figure 11
Step 3: Making the Felling Back Cut
WARNING Figure 13
4. As the hinge gets smaller, the tree should begin to fall. When
Always recheck the area for bystanders, animals and obstacles
the tree begins to fall, remove the chain saw from the cut,
before making the felling back cut.
stop the engine and set the chainsaw down immediately.
Promptly exit the area along the retreat path, but keep
This cut fells the tree. watching the tree as it falls.
1. Make a horizontal cut into the opposite side of the tree from
the notched undercut (Fig. 12). Make the cut approximately 2 DANGER
inches (5 cm) above the bottom of the notched undercut
(Fig. 12). If the tree starts to fall in the wrong direction and binds
the chain saw, leave the chainsaw and evacuate the area
2. As the cut gets close to the notched undercut, only a thin immediately! Do not try to save the chain saw!
band of wood will support the tree. This band of wood is
referred to as the hinge (Fig. 12). The hinge helps control the
fall of the tree. Leave approximately 2 inches (5 cm) of hinge WARNING
in place. Do not cut through the hinge. Cutting through the
Stay clear of spring poles when operating the chainsaw. Spring
hinge could cause the tree to fall in any direction.
poles are branches, logs, roots or saplings that are bent under
tension by other wood (Fig. 14). When the tension is released,
Felling back cut
spring poles can strike the operator, causing serious injury
2 inches (5 cm)
and potentially knocking the chain saw into the operator’s
Hinge body. Use extreme caution when cutting spring poles or when
2 inches releasing the cause of tension.
(5 cm)
Spring pole
Figure 12
Figure 14
19100641 - Chainsaw Operation
Limbing DANGER
Limbing is the process of removing branches from a fallen tree.
Use extreme caution when cutting a fallen tree that is still
1. Leave the larger support limbs under the tree for last (Fig. 15). attached to the root structure. When the trunk is separated
These will keep the tree off the ground during the limbing from the roots, the stump has a high potential for rocking back
process. into the hole created by the roots. This can result in serious
2. Cut one limb at a time. Stand on the opposite side of the tree injury or death. Never stand in the hole left by the roots. Never
from the limb (Fig. 15). Keep the trunk between the operator allow others to stand near the root structure.
and the chain saw. To avoid binding the chain saw, branches
under tension should be cut from the bottom up.
Bucking: Procedure
3. Remove the cut limbs from the work area.
Cutting Logs Under Stress
When logs are supported on one or both ends, the wood tends to
bend during the cutting process. This can cause the chain saw to
become pinched between the two sides. Pay extra attention.
1. Make the first cut approximately 1/3 the diameter of the log.
Do not cut deeper than 1/3.
1a. If the log is supported on one end (Fig. 16), make the first
cut from below (underbucking). Refer to Underbucking.
Support limb
1b. If the log is supported on two ends (Fig. 17), make the
Figure 15 first cut from above (overbucking). Refer to Overbucking.
2. Make the second cut from the opposite side until the two cuts
Bucking: Safety meet. If the diameter of the wood is large enough, insert soft
Bucking is the process of cutting a fallen tree into logs of desired plastic or wooden wedges to hold the cut open and prevent
lengths. Follow these safety precautions to reduce the risk of pinching (Fig.20). Take care not to touch the wedges with the
serious injury: saw chain.
1. Clear the area of objects or obstructions that could contact Cutting Fully-Supported Logs
the guide bar and result in kickback. When logs are supported along the entire length, extra care should
2. When bucking on a slope, always stand on the uphill side of be taken to make sure the saw chain does not contact the ground
the fallen tree. or other support structure (Fig. 18).
3. If possible, the end of the tree to be cut should be raised off 1. Cut through the log as much as possible, without cutting
of the ground. A timber jack or saw horse is ideal for this into the ground or support structure. Cut from above
purpose. Use a timber jack to lift and support tree trunk off (overbucking). Refer to Overbucking.
ground. If a timber jack or saw horse is not available, use 2. Roll the log over and finish cutting through the log from above
other logs or any remaining limb stumps. Make sure the tree (overbucking).
if firmly supported.
Overbucking
4. Do not let the saw chain contact the ground or saw horse.
1. Begin cutting from above, with the bottom of the saw chain
5. Cut one log at a time. Use plastic felling wedges to prevent against the top of the log (Fig. 18).
pinch and resulting chain derailment. Release the throttle
2. Exert light, downward pressure. The saw will tend to pull
control and allow the saw chain to come to a complete stop
away from the operator. Be prepared and hold the saw firmly
before moving on to the next log.
to maintain control.
6. Keep feet and all other body parts clear of falling logs.
Underbucking
1. Begin cutting from below, with the top of the saw chain
against the bottom of the log (Fig. 19).
2. Exert light, upward pressure. The saw will tend to push
toward the operator. Be prepared and hold the saw firmly to
maintain control.
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