Troy-Bilt TB25PS User manual

769-24090 / 00 11/19
TB25PS
2-Cycle Pole Saw
Operator’s Manual
IMPORTANT: Read this manual thoroughly before using this product. Follow all instructions.
SAVE THESE INSTRUCTIONS

2
SAFETY
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of
California, Maine, Oregon and Washington. All U.S. Forest Land
and the state of California (Public Resources 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 a spark arrestor, maintained in effective
working order, or the engine be constructed, equipped and
maintained for the prevention of fire. Check with your state or local
authorities for regulations pertaining to these requirements. Failure
to follow these requirements could subject you to liability or a fine.
This unit is factory equipped with a spark arrestor. If it requires
replacement, contact your local service dealer to install the
appropriate muffler assembly.
Read the operator’s manual and follow all warnings and safety
instructions. Failure to do so can result in serious injury to the
operator and/or bystanders.
SYMBOL MEANING
WARNING:Signals a SERIOUS hazard.
Failure to obey a safety WARNING symbol CAN result in
serious injury to yourself or to others.
CAUTION:Signals a MODERATE hazard.
Failure to obey a safety CAUTION symbol MAY result in
property damage or injury to yourself or to others.
The purpose of safety symbols is to attract your attention to
possible dangers. The safety symbols, and their explanations,
deserve your careful attention and understanding. The safety
warnings do not by themselves eliminate any danger. The
instructions or warnings they give are not substitutes for proper
accident prevention measures.
NOTE: Advises you of information or instructions vital to the
operation or maintenance of the equipment.
DANGER:Signals an EXTREME hazard.
Failure to obey a safety DANGER symbol WILL result in
serious injury or death to yourself or to others.
WARNING:This product can expose you to
chemicals including engine exhaust, which is known to the
State of California to cause cancer, and carbon monoxide,
which is known to the State of California to cause birth
defects or other reproductive harm. For more information
go to www.P65Warnings.ca.gov.
TABLE OF CONTENTS
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Essential Terms and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . .10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Oil and Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
All information, illustrations, and specifications in this manual are based
on the latest product information available at the time of printing. We
reserve the right to make changes at any time without notice.
The product may vary slightly from the illustrations contained in this
manual.
Copyright© 2019 MTD SOUTHWEST INC, All Rights Reserved.
SERVICE
DO NOT RETURN THIS UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
For assistance regarding the assembly, operation or maintenance of
the unit, please call 1-800-828-5500 (in the United States) or 1-800-
668-1238 (in Canada). Additional information can be found at
www.troybilt.com (in the United States) or www.troybilt.ca (in
Canada).
Warranty service is available through an authorized service center.
To locate a service center in your area, please visit our website or
call the number listed above. Service on this unit, both within and
after the warranty period, should only be performed by an
authorized and approved service center. When servicing, use only
identical replacement parts.

3
• IMPORTANT SAFETY INSTRUCTIONS •
READ ALL INSTRUCTIONS BEFORE OPERATING
• Read the instructions carefully. Be familiar with the controls and
proper use of the unit. Know how to stop the unit and disengage
the controls quickly.
• Stay alert. Do not operate this unit when tired, ill or under the
influence of alcohol, drugs or medication.
• Never allow children to operate the unit. Teens must be trained,
accompanied and supervised by an adult. Never allow adults to
operate the unit without proper instruction.
• All guards and safety attachments must be installed properly
before operating the unit.
• Inspect the unit before use. Check for damaged parts. Check for
fuel leaks. Make sure all parts operate properly. Make sure all
fasteners are in place and secure. Make sure all moving parts are
properly aligned and are not bound. Replace parts that are cracked,
chipped, or damaged in any way. Have all damaged or improperly
working parts repaired or replaced by an authorized service center.
Do not operate the unit with loose or damaged parts.
• Be aware of risk of injury to the head, hands and feet.
• Carefully inspect the area before starting the unit. Remove
rocks, broken glass, nails, wire, string and other objects that
may be thrown or become entangled with the unit.
• Clear the area of children, bystanders and pets; keep them
outside a 50-foot (15 m) radius, at a minimum (Fig. A). Even
then, they are still at risk from thrown objects. Encourage
bystanders to wear eye protection. If you are approached, stop
the unit immediately.
• Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments or
repairs before using the unit.
• Do not change the engine governor settings or overspeed the
engine.
• This unit is intended for occasional, household use only.
WARNING:When using the unit, all safety
instructions must be followed. Please read these
instructions before operating the unit in order to ensure the
safety of the operator and any bystanders. Please keep
these instructions for later use.
SAFETY WARNINGS FOR GAS UNITS
• Store fuel only in containers specifically designed and approved
for the storage of such materials.
• Always stop the engine and allow it to cool before filling the
tank. Never remove the fuel tank cap or add fuel when the
engine is hot. Always loosen the fuel tank cap slowly to relieve
any pressure in the tank before fueling.
• Always mix and add fuel in a clean, well-ventilated outdoor area
where there are no sparks or flames. DO NOT smoke.
• Never operate the unit without the fuel cap securely in place.
• Avoid creating a source of ignition for spilled fuel. Wipe up any
spilled fuel from the unit immediately, before starting the unit.
Move the unit at least 30 ft. (9.1 m) from the fueling source and
site before starting the engine. DO NOT smoke.
• Never start or run the unit inside a closed room or building.
Breathing exhaust fumes can kill. Operate this unit only in a well-
ventilated outdoor area.
WARNING:Gasoline is highly flammable and
its vapors can explode if ignited. Take the following
precautions:
WHILE OPERATING
• Wear safety glasses or goggles that meet current ANSI / ISEA
Z87.1 standards and are marked as such. Wear ear/hearing
protection when operating this unit. Wear a face mask or dust
mask if the operation is dusty. Use a hard hat or other type of
safety helmet. Falling debris can result in serious personal injury.
• Wear safety boots and protective gloves. Wear heavy, snug-
fitting clothes, including long pants and a long-sleeve shirt. Do
not wear loose clothing, jewelry, short pants, sandals or go
barefoot. Secure hair above shoulder level.
• The attachment should remain stationary when the engine is
idling. If it does not, refer to Adjusting the Idle Speed.
• Adjust the handle to provide the best grip, if applicable.
• Use the unit only in daylight or good artificial light.
• Avoid starting the unit unintentionally. Be in the starting position
whenever pulling the starter rope. The operator and unit must be
in a stable position while starting. Refer to Starting and Stopping.
• Use the right tool. Only use this tool for its intended purpose: to
cut wood. Do not use the unit for cutting plastic, masonry or
other non-wood building materials. Only use the unit as
described in this manual.
• Keep hair, face, hands, feet and all other body parts away from
the saw chain when the unit is running. Do not touch or try to
stop moving parts.
• Do not touch the engine or muffler. These parts get extremely
hot from operation, even after the unit is turned off.
• Do not operate the unit faster than the speed needed to do the
job. Do not run the unit at high speed when not in use.
• Do not force the unit, especially near the end of a cut. It will do a
better, safer job when used at the intended rate.
• Always turn the unit off when operation is delayed or when
carrying the unit from one location to another.
• Before setting the unit down, always turn the unit off and wait for
all moving parts to come to a complete stop.
Fig. A

4
• If the unit strikes or becomes entangled with a foreign object,
stop the unit immediately. Check for damage. If damaged, do
not restart or operate the unit until it is repaired. Do not operate
the unit with loose or damaged parts.
• Turn the engine off and disconnect the spark plug for
maintenance or repair.
• Use only original equipment manufacturer (OEM) replacement
parts and accessories for this unit. These are available from your
authorized service center. Use of any other parts or accessories
could lead to serious injury to the user, or damage to the unit,
and void the warranty.
• Keep the unit clean. Carefully remove vegetation and other
debris that could block moving parts.
• To reduce fire hazard, replace a faulty muffler and spark arrestor.
Keep the engine and muffler free from grass, leaves, excessive
grease or carbon build up.
• If the unit starts to vibrate abnormally, stop the unit immediately.
Inspect the unit for the cause of the vibration. Vibration is
generally an indicator of trouble.
• Do not use the unit in the presence of flammable liquids or gases.
• Do not operate a unit that is damaged, improperly adjusted or
not completely and securely assembled. Make sure moving
parts stop when the unit is turned off. Do not use the unit if it
does not turn on and off properly. Have defective parts replaced
by an authorized service center.
POLE SAW SAFETY
• Make sure the saw chain is not in contact with anything before
starting the unit.
• When carrying the unit, hold it away from the body, with the
guide bar positioned to the rear. Cover the guide bar and saw
chain with the scabbard when carrying the unit.
• Keep the work area clean. Cluttered areas invite injuries. Do not
start cutting until the work area is clear and free from
obstructions. Make sure there is secure footing and a planned
retreat path from falling trees or branches.
• Do not stand directly under limbs being trimmed (Fig. A). Always
take a position out of the path of falling debris.
• Do not use a pole saw to fell a tree. Use a standard chain saw
for this application.
• For safer, more effective performance, make sure the guide bar
and chain are properly cleaned, lubricated, tightened and
sharpened. Check the guide bar and chain at frequent intervals
for proper adjustment.
• When cutting a limb that is under tension, use extreme caution.
When the tension is released, the limb could spring back and
strike the operator, causing severe injury or death.
• Use extreme caution when cutting small-sized brush and
saplings, as slender material may catch the saw chain and be
whipped toward the operator or pull the operator off balance.
• This saw is intended for infrequent use. It is not intended for
prolonged use. If the intended use involves prolonged periods of
operation, this may cause circulatory problems in the user’s
hands due to vibration. Take frequent breaks and adjust your
working position, as needed.
• Do not operate the unit in a tree or on a ladder unless
specifically trained to do so.
• Do not attempt operations beyond the operator’s capacity or
experience.
• Always use the scabbard on the guide bar and saw chain during
transportation and storage.
• Do not remove cut material, or hold material to be cut, when the
unit is running. Always turn the unit off, and wait for the saw chain
to come to a complete stop before clearing jammed material. A
moment of inattention can result in serious personal injury.
• Do not use the unit in bad weather conditions, especially when
there is a risk of lightning. This decreases the risk of being
struck by lightning.
WARNING:Do not operate the unit near
electrical cables or power lines (Fig. A). This unit is not
designed to provide protection from electric shock if
contact is made with electric lines. Keep at least 50 feet
(15 m) away from all power lines. Refer to local regulations
for specific information about safe distances. Always make
sure the area is clear of electric lines and the operator is in
a safe position before operating the unit. Contact with, or
use near, power lines may cause serious injury or electric
shock resulting in death.

5
Fig. B
Rotational
Kickback
Kickback
Danger Zone
Saw Chain
Direction
KICKBACK SAFETY
Understanding Kickback
A basic understanding of kickback can help reduce or eliminate the
element of surprise and the chance of kickback-related injury.
Sudden surprise contributes to accidents.
•Rotational Kickback can happen when the upper tip of the
guide bar contacts an object while the chain is moving (Fig. B).
This can cause the chain to dig into the object and momentarily
stop moving. The guide bar is then kicked up and back toward
the operator in a lightning-fast reverse reaction.
•Linear Kickback can happen when the wood on either side of a
cut closes in and pinches the moving saw chain along the top of
the guide bar (Fig. C). This can cause the chain to instantly stop.
The chain force is then reversed, causing the saw to move in the
opposite direction, sending the saw straight back toward the
operator.
•Pull-In can happen when the moving chain on the bottom of the
guide bar hits a foreign object inside the wood. This can cause
the chain to suddenly stop. The saw is then pulled forward and
away from the operator, which could potentially result in the loss
of control of the saw.
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 back towards
the operator. Pinching the saw chain along the top of the
guide bar may push the guide bar rapidly back towards the
operator. Either of these reactions may cause a loss of
control over the saw, which could result in serious injury to
the user. Contact with foreign objects within the wood can
also induce a loss of chain saw control.
Fig. C
Linear
Kickback
Pinch
Kickback Safety Precautions
Take the following steps to reduce the chance of accident or injury:
• Do not rely exclusively upon the safety devices built into the unit.
• Do not overreach. Always keep proper footing and balance. Take
extra care when working on stairs, steep slopes or inclines. Do
not extend arms above shoulder height.
• Do not make cuts with the tip of the guide bar.
• Make sure the area of operation is free from obstructions. Do not
let the tip of the guide bar contact any object, such as a log,
branch, the ground or other obstruction.
• Always inspect the wood before cutting. Foreign objects could
damage the unit or cause serious personal injury. Never cut
through nails, metal rods, railroad ties or pallets.
• Do not operate the unit with one hand! Serious injury to the
operator, helpers or bystanders may result from one-handed
operation. This unit is intended for two-handed use. Always grip
the unit firmly with both hands when the unit is running. Do not
let go. A firm grip will help maintain control of the unit and
reduce the chance of kickback.
• Stand slightly to the left of the unit to avoid being in the direct
line of the saw chain.
• Hold the shaft grip with the right hand. Keep the right arm
slightly bent.
• Hold the handle with the left hand. Keep the left arm straight.
• Never start the saw when the guide bar is inside an existing cut.
Be extremely careful when re-entering a cut.
• Always begin a cut with the unit running at full speed. Maintain a
steady cutting speed. Slower speeds increase the chance of
kickback.
• Keep the saw housing pressed firmly against the wood.
• Do not cut more than one branch at a time.
• Do not twist the unit when removing the guide bar from a cut.
• Watch out for shifting objects (branches, etc.) that might pinch
or fall onto the saw chain during operation.
• Follow the manufacturer’s sharpening and maintenance
instructions for the saw chain.
• Only use replacement bars and chains specified by the
manufacturer or the equivalent. These are available from
authorized service centers. Use of any unauthorized parts or
accessories could lead to serious injury to the operator or
damage to the unit and will void the warranty.
• Use devices that reduce the risks associated with kickback,
such as low-kickback chains, guide bar nose guards, chain
brakes and low-kickback guide bars. There are no other
replacement components for achieving kickback protection in
accordance with CSA Z62.3.
• A low-kickback saw chain is a chain that has met the kickback
performance requirements of ANSI/OPEI B175.1-2012 when
tested according to the provisions specified in ANSI/OPEI
B175.1-2012. A low-kickback saw chain is a chain that is also in
accordance with CSA Z62.3. Do not use a replacement saw
chain unless it has met these requirements for this specific
model or has been designated as a low-kickback replacement
saw chain in accordance with ANSI/OPEI B175.1-2012. As saw
chains are sharpened, some of the low-kickback qualities are
lost and extra caution should be used.
• Do not install a bow guide on this unit. Bow guides have larger
kickback zones, which increase the chance of kickback and
serious injury. This increase is not significantly reduced by using
a low-kickback saw chain. Using a bow guide on this unit is
extremely dangerous.

6
OTHER SAFETY WARNINGS
• Maintain the unit with care. Follow all maintenance instructions
in this manual.
• Do not perform maintenance procedures other than those
described in this manual. All service, other than the maintenance
procedures described in this manual, should be performed by an
authorized service dealer.
• Never remove, modify or make inoperative any safety device
furnished with the unit.
• Before inspecting, maintaining, cleaning, storing, transporting or
replacing any parts on the unit:
1. Stop the unit. Refer to Starting and Stopping.
2. Make sure all moving parts have stopped.
3. Allow the unit to cool.
4. Disconnect the spark plug wire.
• Secure the unit while transporting.
• Never store the unit with fuel in the tank, inside a building where
fumes may reach an open flame (pilot lights, etc.) or sparks
(switches, electrical motors, etc.).
• Store the unit in a dry place, secured or at a height to prevent
unauthorized use or damage. Keep the unit out of the reach of
children.
• Never douse or squirt the unit with water or any other liquid.
Keep handles dry and clean (free from debris, oil and grease).
Clean the unit after each use. Refer to Cleaning and Storage. Do
not use solvents or strong detergents.
• Keep these instructions. Refer to them often and use them to
instruct other users. If you loan this unit to others, also loan
them these instructions.
SAVE THESE INSTRUCTIONS

7
• SAFETY & INTERNATIONAL SYMBOLS •
This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's
manual for complete safety, assembly, operating and maintenance and repair information.
SYMBOL MEANING SYMBOL MEANING
• SAFETY ALERT SYMBOL
Indicates danger, warning or caution. May be used in
conjunction with other symbols or pictographs.
• READ OPERATOR'S MANUAL
WARNING: Read the operator’s
manual(s) and follow all warnings and safety
instructions. Failure to do so can result in serious
injury to the operator and/or bystanders.
• WEAR EYE AND HEARING PROTECTION
WARNING:Thrown objects and loud
noise can cause severe eye injury and hearing loss.
Wear eye protection meeting current ANSI / ISEA
Z87.1 standards and ear protection when operating
this unit. Use a full face shield when needed.
• WEAR FOOT PROTECTION
Always wear heavy-duty, non-slip footwear when
operating this unit.
• WEAR HAND PROTECTION
Always wear heavy-duty, non-slip gloves when
handling this unit.
• HANDLE POSITION
Make sure the handle is positioned beyond the end of
the safety label.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel.
• OIL
Refer to operator’s manual for the proper type of oil.
• DO NOT USE E85 FUEL IN THIS UNIT
CAUTION:It has been proven that fuel
containing greater than 10% ethanol will likely
damage this engine and void the warranty.
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF or STOP
• PRIMER BULB
Push primer bulb, fully and slowly, 10 times.
• THROWN OBJECTS CAN CAUSE SEVERE INJURY
WARNING:Small objects can be
propelled at high speed, causing injury.
Min. 50 ft
15 m
• KEEP BYSTANDERS AWAY
WARNING:Keep all bystanders,
especially children and pets, at least 50 feet (15 m)
from the operating area.
• HOT SURFACE
WARNING:Do not touch a hot muffler
or cylinder. You may get burned. These parts get
extremely hot from operation. When turned off, they
remain hot for a short time.
• DO NOT REPLACE CUTTING HEADS WITH BLADES*
WARNING:When using a trimmer, to
prevent serious injury, do not replace the cutting head
with rigid or metal blades.
*This warning does not apply to units equipped with
blades, such as edgers and brush cutters.

8
SYMBOL MEANING SYMBOL MEANING
• WEAR HEAD, EYE AND HEARING PROTECTION
WARNING: Thrown objects and loud noise can
cause severe eye injury and hearing loss. Wear eye
protection meeting current ANSI Z87.1 standards and
ear protection when operating this unit. Wear head
protection when operating this unit; falling objects can
cause severe head injury. Use a full face shield when
needed.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children
and pets, at least 50 feet (15 m) from the operating area.
• POWER LINES CAN CAUSE SEVERE INJURY
DANGER: Do not operate this unit near power lines.
Contact with a power line may cause serious injury or
damage to the unit. Maintain a clearance of at least 50
feet (15 m) between the pole saw (including any
branches it is contacting) and any electrical line.
WARNING: Always keep a clear work area and
retreat path. Be aware of the location of
limbs/branches to avoid falling limbs and debris.
• KICKBACK
WARNING: 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.
• USE BOTH HANDS
Always use both hands while operating the unit. Never
use only one hand to operate the unit.
• CHAIN OIL ADJUSTMENT INDICATOR
The chain must be continously coated with oil to
function properly. Make sure to set the oil adjustment
screw to allow a sufficient amount of oil to flow
continuously onto the chain.
Use a 3/32-inch Allen wrench to adjust the oil
adjustment screw.

Fuel Cap
Handle
Shaft Grip
Starter Rope Grip
Throttle
Control
Spark PlugMuffler
On/Off Switch
Scabbard
Guide Bar Tip
Guide
Bar
Saw
Chain
Spiked
Bumper
Bar Cover
Chain Oil Cap
Chain-Tensioning
Screw
Chain Oil
Adjustment Screw
Chain Oil Reservoir
Coupler
Extension Boom Coupler
Throttle Lockout
Upper Shaft Housing
Hanger Cap (x2)
Primer Bulb
Choke Lever
Air Filter Cover
9
KNOW YOUR UNIT
APPLICATIONS
As a pole saw:
• Pruning trees
Other optional attachments may be used with this unit.
ASSEMBLY TOOLS REQUIRED
• Flat-head screwdriver

10
• POLE SAW - A tool designed to prune branches with a saw chain. A pole saw is an integrated unit comprised of an engine, saw chain,
guide bar, pole, and grips (handles) that are designed to be held by two hands during operation.
• POWERHEAD - The power-producing portion of the unit, comprised of the engine, grips (handles), throttle control, throttle lockout, and
other components.
• EXTENSION BOOM - A rigid tube that fits between the powerhead and the pole saw attachment to increase the overall length of the unit.
• POLE SAW ATTACHMENT - A cutting head attached to a rigid tube, comprised of a guide bar, saw chain, drive sprocket, and other
components.
• COUPLER - A device that securely connects two sections of the unit together, such as the extension boom and pole saw attachment.
• DRIVE SPROCKET - A toothed wheel that drives the saw chain.
• FRONT HANDLE (HANDLE) - A support handle located on the upper shaft housing on the powerhead.
• REAR HANDLE (SHAFT GRIP) - A support handle located near the engine on the powerhead.
• GUIDE BAR - A solid railed structure that supports and guides the saw chain.
• GUIDE BAR TIP - The tip or end of the guide bar.
• REDUCED-KICKBACK GUIDE BAR - A guide bar that has been demonstrated to reduce kickback significantly.
• SAW CHAIN - A loop of chain with teeth designed to cut wood, which is driven by the engine and is supported by the guide bar. The saw
chain is composed of drive links, cutters and side links, held together by rivets.
• LOW-KICKBACK SAW CHAIN - A saw chain that complies with the kickback performance requirements of ANSI/OPEI B175.1-2012 when
tested on a representative sample of pole saws. Low-kickback saw chain significantly reduces the chance of kickback and the intensity
of kickback, due to specially designed depth gauges and guard links.
• REPLACEMENT SAW CHAIN - A saw chain that complies with the kickback performance requirements of ANSI/OPEI B175.1-2012 when
tested with specific pole saws. It may not meet the ANSI/OPEI performance standards when used with other pole saws.
• SPIKED BUMPER - The pointed tooth (or teeth), at the front of the pole saw, used during pruning to help pivot the saw and maintain a
stable position while cutting.
• OILER CONTROL - A system for oiling the saw chain and guide bar.
• ON / OFF SWITCH - A device that immediately stops the engine when moved to the Off position.
• THROTTLE CONTROL - A device that, when operated in conjunction with the throttle lockout, is used to start the engine and control the
engine speed.
• THROTTLE LOCKOUT - A device that prevents the unit from accelerating accidentally. The throttle control cannot be squeezed unless
the throttle lockout is manually engaged.
• SPARK ARRESTER SCREEN - A device that retains carbon and other flammable particles over 0.023 inches (0.6mm) in size from the
engine exhaust flow. Compliance with local, state and federal laws and/or regulations governing the use of a spark arrester screen is the
user’s responsibility. Refer to Spark Arrestor Note in the Safety section for additional information.
• KICKBACK - A sudden backward and/or upward motion of the guide bar and saw chain. Kickback can occur if the upper portion of the
guide bar tip touches an object while the saw chain is spinning (rotational kickback). Kickback can also occur if the wood closes in and
pinches the saw chain inside the cut (linear kickback).
• ROTATIONAL KICKBACK - A sudden backward and upward motion of the guide bar and saw chain. Rotational kickback can occur if the
upper portion of the guide bar tip touches an object while the saw chain is spinning. The guide bar and saw chain are then kicked up and
back toward the operator in a lightning-fast reverse reaction.
• LINEAR KICKBACK (PINCH KICKBACK) - A sudden backward motion of the guide bar and saw chain. Linear (pinch) kickback can occur
if the wood closes in and pinches the saw chain inside a cut. The saw is then sent straight back toward the operator.
• NORMAL CUTTING POSITION - The positions assumed while making pruning cuts.
• PRUNING - The process of cutting limbs from a living tree.
ESSENTIAL TERMS AND DEFINITIONS