Troy-Bilt TB6042 User Manual
Operator’s Manual
Electric Start Capable
4-Cycle Professional Trimmer
TB6042 XP
769-07314 P00 10/11
TABLE OF CONTENTS
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Starting and Stopping Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Maintenance and Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Optional Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
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.
Copyright© 2011 MTD SOUTHWEST INC, All Rights Reserved.
DO NOT RETURN THIS UNIT TO THE RETAILER. PROOF OF PURCHASE
WILL BE REQUIRED FOR WARRANTY SERVICE.
For assistance regarding the assembly, controls, operation or maintenance of
the unit, please call the Customer Support Department at 1-800-828-5500 in
the United States or 1-800-668-1238 in Canada. Additional information about
the unit can be found on our website at www.troybilt.com or www.troybilt.ca.
For service, please call the Customer Support Department to obtain a list of
authorized service dealers near you. Service on this unit, both within and after
the warranty period, should only be performed by an authorized and approved
service dealer. When servicing, use only identical replacement parts.
SAVE THESE INSTRUCTIONS
SERVICE INFORMATION
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.
FOR QUESTIONS, CALL 1-800-828-5500 IN U.S. OR 1-800-668-1238 in
CANADA
READ ALL INSTRUCTIONS BEFORE OPERATING
• Read the instructions carefully. Be familiar with the controls and proper
use of the unit.
• Do not operate this unit when tired, ill, or under the influence of alcohol,
drugs, or medication.
• Children and teens under the age of 15 must not use the unit, except for
teens supervised by an adult.
• All guards and safety attachments must be installed properly before
operating the unit.
• Inspect the unit before use. Replace damaged parts. Make sure all
fasteners are in place and secure. Replace parts that are cracked,
chipped, or damaged in any way. Do not operate the unit with loose or
damaged parts.
• Carefully inspect the area before starting the unit. Remove all debris and
hard or sharp objects such as glass, wire, etc.
• Clear the area of children, bystanders, and pets. At a minimum, keep all
children, bystanders, and pets outside a 50 feet (15 m) radius; there still
may be a risk to bystanders from thrown objects. Bystanders should be
encouraged to wear eye protection. If you are approached, stop the unit
immediately.
• Never use metal-reinforced line, wire or rope. These can break off and
become dangerous projectiles.
• Squeeze the throttle control and check that it returns automatically to the
idle position. Make all adjustments or repairs before using unit.
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 fuel 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. Do not smoke.
• Always 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 engine. Move the unit at
least 30 feet (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. Only operate this unit in a well-ventilated outdoor area.
WHILE OPERATING
• Be aware of the risk of injury to the head, hands and feet.
• Wear safety glasses or goggles that are marked as meeting ANSI Z87.11989 standards. Also wear ear/hearing protection when operating this
unit. Wear a face or dust mask if the operation is dusty.
• Wear long sleeve shirt, heavy long pants, boots and gloves. Do not wear
loose clothing, jewelry, short pants, sandals or go barefoot. Secure hair
above shoulder level.
• The cutting attachment shield must always be in place while operating
the unit. Do not operate unit without both trimming lines extended, and
the proper line installed. Do not extend the trimming line beyond the
length of the shield.
• This unit has a clutch. The cutting attachment remains stationary when
the engine is idling. If it does not, have the unit adjusted by an authorized
service technician.
• Adjust the D-handle to your size to provide the best grip.
• Be sure the cutting attachment is not in contact with anything before
starting the unit.
• Use the unit only in daylight or good artificial light.
• Avoid accidental starting. Be in the starting position whenever pulling the
starter rope. The operator and unit must be in a stable position while
starting. See Starting and Stopping Instructions.
• Use the right tool. Only use this tool for the purpose intended.
• IMPORTANT SAFETY INSTRUCTIONS •
WARNING: When using the unit, you must follow the safety
rules. 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.
WARNING: Gasoline is highly flammable, and its vapors can
explode if ignited. Take the following precautions:
RULES FOR SAFE OPERATION
2
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, ask your LOCAL SERVICE DEALER to install
the Accessory Part #753-06334 Muffler Assembly.
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.
SYMBOL MEANING
SAFETY ALERT: Indicates danger, warning or caution.
Attention is required in order to avoid serious personal injury. May
be used in conjunction with other symbols or pictographs.
DANGER: Failure to obey a safety warning will result in serious
injury to yourself or to others. Always follow the safety precautions
to reduce the risk of fire, electric shock and personal injury.
WARNING: Failure to obey a safety warning can result in injury
to yourself and others. Always follow the safety precautions to
reduce the risk of fire, electric shock and personal injury.
CAUTION: Failure to obey a safety warning may result in
property damage or personal injury to yourself or to others.
Always follow the safety precautions to reduce the risk of fire,
electric shock and personal injury.
CALIFORNIA PROPOSITION 65
WARNING: Engine exhaust, some of its constituents and
certain finished components contain or emit chemicals known to
the State of California to cause cancer and birth defects or other
reproductive harm. Wash hands after handling.
RULES FOR SAFE OPERATION
3
• Do not overreach. Always keep proper footing and balance.
• Always hold the unit with both hands when operating. Keep a firm grip on
both the front and rear handle or grips.
• Keep hands, face, and feet at a distance from all moving parts. Do not
touch or try to stop the cutting attachment when it is rotating.
• Do not touch the engine or muffler. These parts get extremely hot from
operation. They remain hot for a short time after you turn off the unit.
• Do not operate the engine faster than the speed needed to cut, trim or
edge. Do not run the engine at high speed when you are not cutting.
• Always stop the engine when cutting is delayed or when walking from one
cutting location to another.
• If you strike or become entangled with a foreign object, stop the engine
immediately and check for damage. Do not operate before repairing damage.
• Stop and switch the engine to off for maintenance, repair, or for changing
the cutting attachment or other attachments.
• Use only original equipment manufacturer replacement parts and
accessories for this unit. These are available from your authorized service
dealer. Use of any unauthorized parts or accessories could lead to serious
injury to the user, or damage to the unit, and void your warranty.
• Keep unit clean of vegetation and other materials. They may become
lodged between the cutting attachment and shield.
• To reduce fire hazard, replace faulty muffler and spark arrestor, keep the
engine and muffler free from grass, leaves or other debri.
OTHER SAFETY WARNINGS
• Never store the unit, with fuel in the tank, inside a building where fumes
may reach an open flame or spark.
• Always allow the engine to cool before storing or transporting. Be sure to
secure the unit while transporting.
• Store the unit in a dry area, locked up or up high to prevent unauthorized
use or damage. Keep out of the reach of children.
• Never douse or squirt the unit with water or any other liquid. Keep handles
dry, clean and free from debris. Clean after each use. See the Cleaning
and Storage instructions.
• Keep these instructions. Refer to them often and use them to instruct other
users. If you loan someone this unit, also loan them these instructions.
SAVE THESE INSTRUCTIONS
• SAFETY AND 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, maintenance, and repair information.
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 ANSI Z87.1-1989 standards and ear protection
when operating this unit. Use a full face shield when needed.
• 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
WARNING: 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
• CHOKE CONTROL
1. • FULL choke position
2. • PARTIAL choke position
3. • RUN choke position
• THROWN OBJECTS AND ROTATING CUTTER CAN
CAUSE SEVERE INJURY
WARNING: Small objects can be propelled at high speed,
causing injury. Keep away from the rotating rotor.
• 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.
• SHARP BLADE
WARNING: Sharp blade on cutting attachment shield. To
prevent serious injury, do not touch the line cutting blade.
Cutting Head Shield
Fuel Cap
Throttle
Control
D-Handle
Cutting Head
Shaft
Grip
Primer
Bulb
Choke Lever
Spark Plug
On/Off
Stop
Control
Shaft Housing
Starter
Rope Grip
Line Cutting Blade
Muffler
Air Filter
Cover
EZ-Link
TM
Throttle
Lock-out
Shoulder
Strap Clip
4
KNOW YOUR UNIT ASSEMBLY INSTRUCTIONS
ADJUSTING THE D-HANDLE
1. Loosen the bolt on the handle just enough
to move it (Fig. 1).
2. While holding the unit in the operating
position (Fig. 16), move the D-handle to the
location that provides the best grip.
3. Tighten the bolt until the D-handle is secure.
(Fig. 1)
INSTALL THE CUTTING HEAD SHIELD
1. Place the cutting head shield onto the guard
mount bracket, making sure to align the
holes on the shield with the ones in the
guard mount bracket. (Fig. 2)
2. Take the 4 shield screws and screw each
one into the shield until finger tight.
3. Using a Phillips screwdriver, tighten the screws
until the shield is firmly in place. (Fig. 2)
INSTALL THE SHOULDER SUPPORT
(SOLD SEPARATELY)
1. Put the shoulder support on using the clip.
(Fig. 3).
2. Adjust by lifting slightly on the rear of the
lower clip then push or pull the loose end of
the strap length to fit the operator’s size
and comfort. (Fig. 4).
3. Attach the shoulder clip to the unit. (Fig. 5)
APPLICATIONS
As a trimmer:
• Cutting grass and light weeds.
• Edging
• Decorative trimming around
trees, fences, etc.
Other optional accessories may
be used.
Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
D-Handle
Bolt
6 in.
(15.24 cm)
Minimum
Guard
Mount
Bracket
Screw (4)
Cutting
Head
Shield
Adjustment
Ta b
Support
Clip
Support
Fitting
TOOLS REQUIRED:
• Phillips Screwdriver
• 3/8” Socket
FUELING THE UNIT
1. Remove the fuel cap (Fig. 9).
2. Place the gas container’s spout into the fill
hole on the fuel tank (Fig. 9) and fill the tank.
NOTE: Do not overfill the tank.
3. Wipe up any gasoline that may have spilled.
4. Reinstall the fuel cap.
5. Move the unit at least 30 ft. (9.1 m) from the
fueling source and site before starting the
engine.
NOTE: Dispose of the old gasoline in accordance with federal, state and
local regulations.
5
OIL AND FUEL INFORMATION
RECOMMENDED OIL TYPE
Using the proper type and weight of oil in the
crankcase is extremely important. Check the oil
before each use and change the oil regularly.
Failure to use the correct oil, or using dirty oil,
can cause premature engine wear and failure.
Use a high-quality SAE 30 weight oil of API
(American Petroleum Institute) service class SF,
SG, SH.
ADDING OIL TO CRANKCASE: INITIAL USE
NOTE: This unit is shipped without oil. In order to
avoid damage to the unit, put oil in the
crankcase before you attempt to start the unit.
Your unit is supplied with one 2.2 fl.oz. (60 ml)
bottle of SAE 30 SF, SG, SH oil (Fig. 6).
NOTE: Save the bottle of oil. It can be used to
measure the correct amount during future oil
changes. See Changing the Oil.
1. Unscrew the top of the bottle of oil and
remove the paper seal covering the opening.
Replace the top. Next, cut the tip off the
funnel spout (Fig. 6).
2. Place unit on a flat, level surface.
3. Remove the oil fill plug from the crankcase
(Fig. 8).
4. Pour the entire bottle of oil into the oil fill
hole (Fig. 7).
NOTE: Never add oil to the fuel or fuel tank.
5. Wipe up any oil that may have spilled and reinstall the oil fill plug.
Check oil before each use and change as needed. Refer to Checking the Oil
Level.
RECOMMENDED FUEL TYPE
Old fuel is the primary reason for improper unit performance. Be sure to use
fresh, clean, unleaded gasoline.
NOTE: This is a four cycle engine. In order to avoid damage to the unit, do
not mix oil with gasoline.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and oxygenates such as ethanol,
methanol or MTBE (ether). Alcohol-blended fuel absorbs water. As little as 1%
water in the fuel can make fuel and oil separate or form acids when stored.
Use fresh fuel (less than 30 days old), when using alcohol-blended fuel.
Using Blended Fuels
If you choose to use a blended fuel, or its use is unavoidable, follow
recommended precautions:
• Always use fresh unleaded gasoline
• Use the fuel additive STA-BIL® or an equivalent
• Drain tank and run the engine dry before storing unit
Using Fuel Additives
The use of fuel additives, such as STA-BIL® Gas Stabilizer or an equivalent,
will inhibit corrosion and minimize the formation of gum deposits. Using a
fuel additive can keep fuel from forming harmful deposits in the carburetor
for up to six (6) months. Add 0.8 oz. (23 ml) of fuel additive per gallon of fuel
according to the instructions on the container. NEVER add fuel additives
directly to the unit's gas tank.
WARNING:
OVERFILLING OIL CRANKCASE MAY CAUSE
SERIOUS PERSONAL INJURY. Check and maintain the proper oil
level in the crank case; it is important and cannot be
overemphasized. Check the oil before each use and change it as
needed. See Changing the Oil.
WARNING:
Add fuel in a clean, well ventilated outdoor area. Wipe
up any spilled fuel immediately. Avoid creating a source of ignition for
spilt fuel. Do not start the engine until fuel vapors dissipate.
WARNING:
Gasoline is extremely flammable. Ignited vapors
may explode. Always stop the engine and allow it to cool before
filling the fuel tank. Do not smoke while filling the tank. Keep
sparks and open flames at a distance from the area.
WARNING:
DO NOT USE E85 FUEL IN THIS UNIT.
It has been proven that fuel containing greater than 10% ethanol
will likely damage this engine and void the warranty.
WARNING:
Remove fuel cap slowly to avoid injury from fuel
spray. Never operate the unit without the fuel cap securely in place.
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Funnel
Spout
Fill
Level
Oil Fill Hole
Oil Fill Plug
O-Ring
Gas Can Spout
Fuel Cap
Fuel Tank
6
STARTING AND STOPPING INSTRUCTIONS
STARTING INSTRUCTIONS
1. Check the oil level in the crankcase. Refer to
Checking the Oil Level.
2. Fill the fuel tank with fresh, clean unleaded
gasoline. Refer to Fueling the Unit.
NOTE: There is no need to turn the unit on. The
On/Off Control is in the ON ( I ) position at all
times (Fig. 10).
3. Fully press and release the primer bulb 10
times, slowly. Some amount of fuel should
be visible in the primer bulb (Fig. 11). If fuel
cannot be seen in the bulb, press and
release the bulb until fuel is visible.
4. Place the choke lever in Position 1 (Fig. 11).
5. Crouch in the starting position (Fig. 12). Press
the throttle lockout in and squeeze the throttle
control lever. Pull the starter rope 5 times.
6. Place the choke lever in Position 2 (Fig. 11).
7. While pressing the throttle lockout in and
squeezing the throttle control, pull the
starter rope 3 to 5 times to start the engine.
8. Keep the throttle squeezed and allow the
engine to warm up for 30 to 60 seconds.
9. While continuing to squeeze the throttle
control, place the choke lever in Position 3
(Fig. 11) and warm for an additional 60
seconds. The unit may be used during this
time.
NOTE: Unit is properly warmed up when engine accelerates without hesitation.
IF... the engine hesitates, return the choke lever to Position 2 (Fig. 11) and
continue warm-up.
IF... the engine does not start, go back to step 3.
IF... the engine fails to start after a few attempts, place the choke lever in
Position 3 and squeeze the throttle control. Pull starter rope until unit starts.
IF THE ENGINE IS HOT... Move the choke lever to Position 2, press the
primer bulb 10 times, squeeze the throttle control and pull the starter
rope until the unit starts. Run the unit for 2-5 minutes. The unit may be
used during this time. Then move the choke lever to Position 3.
WARNING:
Operate this unit only in a well-ventilated outdoor area.
Carbon monoxide exhaust fumes can be lethal in a confined area.
WARNING:
Avoid accidental starting. Make sure you are in the
starting position when pulling the starter rope (Fig. 12). To avoid
serious injury, the operator and unit must be in a stable position
while starting.
HOW TO START THE UNIT USING THE ELECTRIC STARTER OR POWER
START BIT ACCESSORY.
NOTE: This Unit Can Use an Electric Start or Power Start Bit™ Optional
Accessory!
Please refer to the Electric Starter or Power Start Bit operator’s manual
for proper use of this feature. (Items Sold Separately! Please refer to
page 10 of this manual about purchasing these accessories.)
STARTING INSTRUCTIONS
1. Check the oil level in the crankcase. Refer to Checking the Oil Level.
2. Fill the fuel tank with fresh, clean unleaded gasoline. Refer to Fueling the
Unit.
NOTE: There is no need to turn the unit on. The On/Off Control is in the ON ( I )
position at all times (Fig. 10).
3. Fully press and release the primer bulb 10 times, slowly. Some amount of
fuel should be visible in the primer bulb (Fig. 11). If fuel cannot be seen in
the bulb, press and release the bulb until fuel is visible.
4. Move the choke lever to Position 1 (Fig. 11).
5. Crouch in the starting position (Fig. 12). Place the electric starter or
power start bit into the back of the unit (Fig. 39). Refer to the Operation
section of the Electric Starter or Power Start Bit operator’s manual.
6. Press the throttle lockout in and squeeze the throttle control lever. Press
and hold the electric starter or drill ON (I) button for 2 seconds.
7. Move the choke lever to Position 2 (Fig. 11).
8. Squeeze the throttle control lever, press and hold the electric starter or
drill ON (I) button for 2-second intervals until the unit starts.
9. Continue to squeeze the throttle control, remove the electric starter or
drill from the unit and allow the engine to warm up for 30 to 60 seconds.
10. Continue squeezing the throttle control, move the choke lever to
Position 3 (Fig. 11) and run the unit for an additional 60 seconds. The
unit may be used during this time.
NOTE: Unit is properly warmed up when engine accelerates without hesitation.
IF... the engine hesitates, return the choke lever to Position 2 (Fig. 11) and
continue warm-up.
IF... the engine does not start, go back to step 3.
IF... the engine fails to start after a few attempts, place the choke lever in
Position 3 and squeeze the throttle control. Press and hold the electric
starter or drill ON (I) button for 2-second intervals until the unit starts.
IF THE ENGINE IS HOT... Move the choke lever to Position 2, press the
primer bulb 10 times, squeeze the throttle control, and press and hold
the electric starter or drill ON (I) button for 2-second intervals until the
unit starts. Run the unit for 2-5 minutes. The unit may be used during this
time. Then move the choke lever to Position 3.
IF USING THE OPTIONAL ELECTRIC STARTER
OR POWER START BIT™ ACCESSORY
STOPPING INSTRUCTIONS
1.
Release the throttle control and allow the engine to cool down by idling.
2. Press and hold the On/Off Control switch in the OFF (O) position until the
unit comes to a complete stop (Fig. 10).
STOPPING INSTRUCTIONS
1. Release the throttle control and allow the engine to cool down by idling.
2. Press and hold the On/Off Control switch in the OFF (O) position until the
unit comes to a complete stop (Fig. 10).
Fig. 10
Fig. 11
Fig. 12
Throttle
Control
Start / On (I)
Stop / Off (O)
Throttle Lockout
Primer Bulb
Choke Lever
Starter
Rope
Throttle
Control
7
ADJUSTING TRIMMING LINE LENGTH
The cutting head allows you to release trimming
line without stopping the engine. To release
more line, lightly tap the cutting attachment on
the ground (Fig. 17) while operating the trimmer
at high speed.
NOTE: Always keep the trimming line fully
extended. Line release becomes more
difficult as the cutting line becomes shorter.
Each time the head is bumped, about 1 inch
(25.4 mm) of trimming line is released. A blade
in the cutting attachment shield will cut the line to the proper length if excess
line is released.
For best results, tap the cutting head on bare ground or hard soil. If line
release is attempted in tall grass, the engine may stall. Always keep the
trimming line fully extended. Line release becomes more difficult as the
cutting line becomes shorter.
NOTE: Do not rest the cutting head on the ground while the unit is running.
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
TIPS FOR BEST TRIMMING RESULTS
• For best trimming results, operate unit at full throttle.
• Keep the cutting attachment parallel to the ground.
• Do not force the cutting attachment. Allow the tip of the line to do the
cutting, especially along walls. Cutting with more than the tip will reduce
cutting efficiency and may overload the engine.
• Cut grass over 8 inches (200 mm) by working from top to bottom in small
increments to avoid premature line wear or engine drag.
• Slowly move the trimmer into and out of the cutting area at the desired
height. Move either in a forward-backward or side-to-side motion. Cutting
shorter lengths produces the best results.
• Trim only when grass and weeds are dry.
• The life of your cutting line is dependent upon:
• Proper adherence of explained trimming techniques
• What vegetation is cut
• Where vegetation is cut
For example, the line will wear faster when trimming against a foundation
wall as opposed to trimming around a tree.
DECORATIVE TRIMMING
Decorative trimming is accomplished by
removing all vegetation around trees, posts,
fences and more.
Rotate the whole unit so that the cutting
attachment is at a 30° angle to the ground (Fig. 18).
OPERATING INSTRUCTIONS
OPERATING THE EZ-LINK™ SYSTEM
The EZ-Link™ system enables the use of these optional Add-Ons:
Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AF720
Hedge Trimmer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AH720
Brushcutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BC720*
Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720
Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720
Pole Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PS720
Straight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SS725
Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720
*Do NOT use this attachment with an electric powered unit.
Removing the Cutting Attachment or Add-On
1. Turn the knob counterclockwise to loosen
(Fig. 15).
2. Press and hold the release button (Fig. 13).
3. While firmly holding the upper shaft housing,
pull the cutting attachment or add-on straight
out of the EZ-Link™ coupler (Fig. 14).
Installing the Cutting Attachment or Add-On
NOTE: Place the unit on the ground or on a
work bench to make add-on installation or
removal easier.
1. Turn knob counterclockwise to loosen (Fig. 15).
2. While firmly holding the add-on, push it
straight into the EZ-Link™ coupler (Fig. 14).
NOTE: Aligning the release button with the
guide recess will help installation (Fig. 13).
3. Turn the knob clockwise to tighten (Fig. 15).
For edging (when using the line head cutting attachment with EZ-Link™
models), lock the release button of the cutting attachment into the 90°
edging hole (Fig. 15).
HOLDING THE TRIMMER
Before operating the unit, stand in the operating position (Fig. 16). Check for
the following:
• The operator is wearing eye protection and proper clothing
• With a slightly-bent right arm, the operator’s
right hand is holding the shaft grip
• The operator’s left arm is straight, the left
hand holding the handle
• The unit is at waist level
• The cutting attachment is parallel to the
ground and easily contacts the grass without
the need to bend over
WARNING:
Before you begin using any attachment, read and
understand the manual that came with the attachment. Follow all
safety information contained within.
WARNING:
To avoid serious
personal injury and damage to the
unit, shut the unit off before
removing or installing add-ons.
CAUTION:
Lock the release button in the primary hole and
securely tighten the knob before operating this unit.
CAUTION:
Add-ons are to be
used in the primary hole only. Using
the wrong hole could lead to
personal injury or damage to the unit.
WARNING:
Always wear eye, hearing, foot and body protection
to reduce the risk of injury when operating this unit.
WARNING:
Do not remove or alter the line cutting blade
assembly. Excessive line length will make the clutch overheat. This
may lead to serious personal injury or damage to the unit.
Fig. 13
Fig. 14
Fig. 15
Guide Recess
Release
Button
EZ-Link™
Coupler
Upper Shaft
Housing
Lower Shaft
Housing
Primary Hole
Knob
90˚ Edging Hole
(Trimmer Only)
Fig. 16
Fig. 17
Fig. 18
8
MAINTENANCE AND REPAIR INSTRUCTIONS
CHECKING THE OIL LEVEL
The importance of checking and maintaining the
proper oil level in the crankcase cannot be
overemphasized. Check oil before each use:
1. Stop the engine and allow oil to drain into
the crankcase.
2. Place the unit on a flat, level surface to get a
proper oil level reading.
3. Keep dirt, grass clippings and other debris
out of the engine. Clean the area around the
oil fill plug before removing it.
4. Remove the oil fill plug.
5. Check the oil level. Oil should be just to the bottom of the threads of the
oil fill hole (Fig. 26).
6. If the level is low, add a small amount of oil to the oil fill hole and recheck
(Fig. 26). Repeat this procedure until the oil level reaches the bottom of the
threads in the oil fill hole.
NOTE: Do not overfill the unit.
NOTE: Make sure the O-ring is in place on the oil fill plug when checking
and changing the oil (Fig. 25).
CHANGING THE OIL
Change the oil while the engine is still warm. The
oil will flow freely and carry away more impurities.
1. Remove the oil fill plug.
2. Pour the oil out of the oil fill hole and into a
container by tipping the unit to the side (Fig.
27). Allow ample time for complete drainage.
3. Wipe up any oil residue on the unit and
clean up any oil that may have spilled.
Dispose of the oil according to federal, state
and local regulations.
4. Refill the crankcase with 2.2 fl.oz. (60 ml) of
SAE 30 SF, SG, SH oil.
NOTE: Use the bottle and spout saved from initial use to measure the correct
amount of oil. The top of the label on the bottle measures approximately
3.4 ounces (100 ml) (Fig. 28). Check the level (Fig. 26). If the level is low,
add a small amount of oil and recheck. Do not overfill (Fig. 26).
5. Replace the oil fill plug.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Failure to maintain the air filter properly can
result in poor performance or can cause
permanent damage to the engine.
1. Open the air filter cover by pressing the lock
tab in and pulling out on the air filter cover
(Fig. 29 and 30).
2. Remove the air filter (Fig. 31).
3. Wash the filter in detergent and water. Rinse
the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly coat the filter.
CAUTION:
Wear gloves to prevent
injury when handling the unit.
WARNING:
To avoid serious
personal injury, always turn the unit
off and allow it to cool before you
clean or service it.
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency stated in
the table. These procedures should also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or skills.
If you are unsure about these procedures take your unit to any non-road
engine repair establishment, individual or authorized service dealer.
NOTE: Maintenance, replacement, or repair of the emission control
devices and system may be performed by any non-road engine repair
establishment, individual or authorized service dealer.
NOTE: Please read the California/EPA statement that came with the unit
for a complete listing of terms and coverage for the emissions control
devices, such as the spark arrestor, muffler, carburetor, etc.
WARNING:
To prevent serious injury, never perform
maintenance or repairs with unit running. Always service and
repair a cool unit. Disconnect the spark plug wire to ensure that
the unit cannot start.
REMOVING THE LINE
1. Rotate the bump knob clockwise until all
line is inside the cutting head (Fig. 19).
NOTE: If the bump knob will not rotate, refer to
Disassembling and Reassembling the
Cutting Head.
2. Using a flat-head screwdriver, insert the tip
into the line dimple and just under the
exposed portion of the line (Fig. 20).
3. Pull the line straight out until all line is
removed from the cutting head.
Disassembling and Reassembling the
Cutting Head
1. Press the tab inward and rotate the upper
spool cover clockwise until the arrows on the
upper and lower spool covers align (Fig. 21).
2. Remove the upper spool cover.
3. Remove the old trimming line from the
cutting head.
4. Align the arrows on the upper and lower
spool covers. Push the upper and lower
spool covers together. Rotate the upper
spool cover counterclockwise until it locks
into place (Fig. 22).
LINE INSTALLATION
Always use original equipment manufacturer
0.095 in. (2.41 mm) replacement line.
1. Align the arrows on the bump knob with the
spool cover eyelets, if they are not already
(Fig. 23).
2. Using 16 ft. (3.2 m) of 0.095 in. (2.41 mm)
replacement line push both ends of the line
through the holes in the bump knob until they
protrude through the eyelets on both sides of
the cutting head. Continue pulling the line
until approximately 6 ft. (1.5 m) is visible from
both sides of the cutting head. (Fig. 24)
3. Hold the spool cover, turn the bump knob
clockwise to wind the line around the spool
until about 5 in. (12.7 cm) is protruding from
each side of the cutting head. (Fig. 19)
4. Start the unit and bump the cutting head on
the ground until the desired cutting length is
achieved. Excess line will be trimmed off by
the line blade.
NOTE: If the cutting line ends are pulled into the cutting head or the line
becomes twisted, refer to Removing the Line.
FREQUENCY MAINTENANCE REQUIRED SEE
Every 10 hours Clean and oil air filter p. 8
After 1st 10 hours
Change oil
Check rocker arm to valve clearance and adjust
p. 8
p. 9
Every 40 hours
Change oil
Check rocker arm to valve clearance and adjust
Check spark plug condition and gap
p. 8
p. 9
p. 9
WARNING:
To prevent extensive
engine wear and damage to the
unit, always maintain the proper oil
level in the crankcase. Never
operate the unit with a low oil level.
Fig. 19
Fig. 20
Fig. 23
Fig. 24
Fig. 25
Bump
Knob
Flat-Head
Screwdriver
Trimmer
Line
Dimple
Arrows
Eyelet
Trimmer line
O-Ring
Oil Fill Plug
Fig. 26
Fig. 27
Fig. 28
Oil Fill Hole
Add 1.4-1.5 Oz.
(41-44 ml)
Fill
Level
Fig. 29
Fig. 30
Air Filter
Cover Tab
Air Filter Cover
Air Filter Cover
Back Plate
Fig. 21
Upper
Spool
Cover
Fig. 22
Lower
Spool
Cover
Upper
Spool
Cover
Lower
Spool
Cover
Ta b
Arrows
Arrows
9
If these statements are not true, repeat this
step.
7. Slide the feeler gauge between the rocker
arm and the valve return spring. Measure
the clearance between the valve stem and
rocker arm (Fig. 37). Measure both the
intake and exhaust valves.
The recommended clearance for both intake
and exhaust is .003 – .006 in. (.076 – 0.152
mm). Use a standard automotive .005 in. (0.127
mm) feeler gauge. The feeler gauge should slide
between the rocker arm and valve stem with a
slight amount of resistance, without binding
(Fig. 36 and 37).
8. If the clearance is not within specification:
a. Turn the adjusting nut using a 5/16 inch (8
mm) wrench or nut driver (Fig. 37).
• To increase clearance, turn the adjusting
nut counterclockwise.
• To decrease clearance, turn the adjusting nut clockwise.
b. Recheck both clearances, and adjust as necessary.
9. Reinstall the rocker arm cover using a new gasket. Torque the screw to
20–30 in•lb (2.2–3.4 N•m).
10. Check the spark plug and reinstall. See Replacing the Spark Plug.
11. Replace the spark plug wire.
12. Reinstall the engine cover. Check alignment of the cover before
tightening the screws. Tighten screws.
REPLACING THE SPARK PLUG
Use a replacement part number 753-05784 or Champion® RDZ4H spark
plug. The correct air gap is 0.025 in. (0.635 mm).
1. Stop the engine and allow it to cool. Remove the two (2) screws on back
of the engine cover and the one on the front of the engine cover with a
Flat-head or T-25 Torx® screwdriver (Fig. 33).
2. Grasp the plug wire firmly and pull the cap from the spark plug.
3. Clean dirt from around the spark plug. Remove the spark plug from the
cylinder head by turning a 5/8 in. socket counterclockwise.
3. Replace cracked, fouled or dirty spark plug.
Set the air gap at 0.025 in. (0.635 mm)
using a feeler gauge (Fig. 38).
4. Install a correctly-gapped spark plug in the
cylinder head. Turn the 5/8 in. socket
clockwise until snug.
If using a torque wrench torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
MAINTENANCE AND REPAIR INSTRUCTIONS
WARNING:
Do not sand blast,
scrape or clean electrodes. Grit in the
engine could damage the cylinder.
5. Squeeze the filter to spread and remove
excess oil.
6. Replace the air filter into the base plate
(Fig. 31).
NOTE: If the unit is operated without the air
filter, you will VOID the warranty.
7. Reinstall the air filter cover. Position the two
small tabs on the air filter cover into the two
slots in the back plate and press the air filter
cover down, making sure to align the lock tab with the lock tab slot, until
it snaps into place (Fig. 29 and 30).
IDLE SPEED ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw is
between the air filter cover and the engine starter housing (Fig. 32).
NOTE: Careless adjustments can seriously damage your unit. An authorized
service dealer should make carburetor adjustments.
If, after checking the fuel and cleaning the air filter, the engine still will not
idle, adjust the idle speed screw as follows:
1. Start the engine and let it run at a high idle for a minute to warm up.
Refer to Starting and Stopping Instructions.
2. Release the throttle trigger and let the engine idle. If the engine stops,
insert a small Phillips or flat blade screwdriver into the hole in the air
filter/muffler cover (Fig. 32). Turn the idle speed screw in, clockwise, 1/8
of a turn at a time (as needed) until the engine idles smoothly.
NOTE: The cutting attachment should not rotate when the engine idles.
3. If the cutting attachment rotates when the engine idles, turn the idle
speed screw counterclockwise 1/8 of a turn at a time (as needed), to
reduce idle speed.
Checking the fuel, cleaning the air filter, and adjusting the idle speed should
solve most engine problems. If not and all of the following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
ROCKER ARM CLEARANCE
This adjustment requires disassembly of the
engine. If feeling unsure or unqualified to
perform this, take the unit to an authorized
service center.
• The engine must be cold when checking or
adjusting the valve clearance.
• This task should be performed inside in a
clean, dust free area.
1. Remove the two (2) screws on back of the
engine cover and the one on the front of the
engine cover with a Flat-head or T-25 Torx®
screwdriver (Fig. 33).
2. Remove the engine cover (Fig. 34).
3. Disconnect the spark plug wire.
4. Clean dirt from around the spark plug.
Remove the spark plug from the cylinder
head by turning a 5/8 in. socket
counterclockwise.
5. Clean dirt from around the rocker arm cover.
Remove the screw holding the rocker arm
cover with a large flat blade screwdriver or
Torx® T-25 bit (Fig. 35). Remove the rocker arm cover and gasket.
6. Pull the starter rope slowly to bring the piston to the top of its travel,
(known as top dead center). Check that:
• The piston is at the top of its travel while looking in the spark plug hole
(Fig. 35)
• Both rocker arms move freely, and both valves are closed
WARNING:
To avoid serious
personal injury, always turn the unit
off and allow it to cool before
cleaning or servicing it.
WARNING:
The cutting
attachment may spin during idle
speed adjustments. Wear protective
clothing and observe all safety
instructions to prevent serious
personal injury.
Fig. 31
Air Filter
Back
Plate
Fig. 32
Fig. 33
Fig. 34
Fig. 35
Idle
Adjustment
Screw
Remove Screws
Muffler
Engine
Cover
Rocker Arm
Cover
Screw
Spark Plug
Hole
Fig. 36
Fig. 37
Fig. 38
Adjusting Nuts
INTAKE
Rocker
Arms
EXHAUST
Valve Stem
Exhaust
Adjusting
Nut
Feeler
Gauge
Rocker Arm
0.025 in.
(0.635 mm)
0.003–0.006 in.
(0.076–0.152 mm)
Empty fuel tank Fill fuel tank with fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10
times
Old fuel (over 30 days) Drain fuel tank and add fresh fuel
Fouled spark plug Replace or clean the spark plug
10
* All specifications 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.
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 4-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 cu. in. (25 cc)
Operating RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6,800 - 9,300 rpm
Idle Speed RPM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800 - 3,600 rpm
Valve clearance . . . . . . . . . . . . . . . . . . . . . 0.003–0.006 in. (0.076–0.152 mm)
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 inch (0.635 mm)
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 30 Oil
Crankcase Oil Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 oz (60 ml)
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unleaded
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 oz (355 ml)
Approximate Weight (without fuel) . . . . . . . . . . . . . . . . . . . . . 14.5 lbs (5.4 kg)
Cutting Mechanism. . . . . . . . . . . . . . . . . . . . . . . . . Professional Bump Head
Line Spool Diameter: . . . . . . . . . . . . . . . . . . . . . . . . . . 3.25 inches (82.6 mm)
Trimming Line Diameter:. . . . . . . . . . . . . . . . . . . . . . . 0.095 inches (2.41 mm)
Cutting Path Diameter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 in. (45.7 cm.)
ELECTRIC STARTER AND POWER START BIT™ FEATURES
This unit is designed to be started with an optional electric starter or Power
Start Bit™ that are sold separately. If choosing to start the unit using one of
these features or have questions please contact your local retailer or call 1-
800-828-5500 U.S, (1-800-668-1238 Canada), for more information and
purchasing. You may also go to www.troybilt.com or www.troybilt.ca.
CLEANING
Use a small brush to clean off the outside of the unit. Do not use strong
detergents. Household cleaners that contain aromatic oils such as pine and
lemon, and solvents such as kerosene, can damage plastic housing or
handle. Wipe off any moisture with a soft cloth.
STORAGE
• Never store the unit with fuel in the tank where fumes may reach an open
flame or spark.
• Allow the engine to cool before storing.
• Lock up the unit to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
Short Term Storage (1-2 weeks)
1. Store the unit in a horizontal position. If this is not possible, store the unit
vertically with the engine at the top.
Long Term Storage
1. Remove the fuel cap, tip the unit and drain the fuel into an approved
container.
NOTE: Do not use gasoline that has been stored for more than 30 days. Dispose
of old gasoline in accordance with federal, state and local regulations.
2. Start the engine and allow it to run until it stalls. This ensures that all
gasoline has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5 drops of high
quality motor oil into the cylinder. Pull the starter rope slowly to distribute
the oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil from the cylinder
before attempting to start the trimmer after storage.
4. Change the oil, referring to Changing the Oil. Dispose of the old oil in
accordance with federal, state and local regulations.
5. Thoroughly clean the unit and inspect for any loose or damaged parts.
Repair or replace damaged parts and tighten loose screws, nuts or bolts.
The unit is ready for storage.
WARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or servicing it.
CLEANING AND STORAGE
OPTIONAL ACCESSORY
CAUSE ACTION
Old fuel (over 30 days) Drain fuel tank and add fresh fuel
Fouled spark plug Replace or clean the spark plug
The outside temperature is above 90˚ F
Move the choke lever to Position 2,
press the primer bulb 10 times,
squeeze the throttle control and pull
the starter rope until the unit starts.
Run the unit for 2-5 minutes. The unit
may be used during this time. Then
move the choke lever to Position 3.
Old fuel (over 30 days) Drain fuel tank and add fresh fuel
Cutting attachment bound with grass
Stop the engine and clean the
cutting attachment
Dirty air filter Clean or replace the air filter
Cutting attachment bound with grass
Stop the engine and clean cutting
attachment
Cutting attachment out of line Refill with new line
Line twisted when refilled Disassemble and rewind the line
Not enough line is exposed
Push the bump head and pull out
line until 4 inches (102 mm) of line is
outside of the cutting attachment
TROUBLESHOOTING
Air filter is plugged Replace or clean the air filter
Old fuel (over 30 days) Drain fuel tank and add fresh fuel
Improper idle speed
Adjust according to the Idle Speed
Adjustment section
ENGINE WILL NOT ACCELERATE
ENGINE WILL NOT IDLE
If further assistance is required, contact your authorized service dealer.
ENGINE LACKS POWER OR STALLS WHEN CUTTING
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
SPECIFICATIONS*
Fig. 39
Electric
Start
Feature
ENGINE WILL NOT START
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