TB304S - Grass trimmer TROY-BILT - Free user manual and instructions

USER MANUAL TB304S TROY-BILT

SAVE THESE INSTRUCTIONS

IMPORTANT: Read this manual thoroughly before using this product. Follow all instructions.

English (Original Instructions)....3

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.

Starting and Stopping 20

Operation 24

Maintenance 28

Cleaning and Storage....33

Troubleshooting....34

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.

NOTE: This operator's manual covers multiple models. Features may vary by model. Not all features in this manual are applicable to all models. The model depicted may differ from yours.

SAFETY

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.

SYMBOL MEANING

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: 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.

NOTE: Advises you of information or instructions vital to the operation or maintenance of the equipment.

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.

WARNING: 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.

- IMPORTANT SAFETY INSTRUCTIONS

READ ALL INSTRUCTIONS BEFORE OPERATING

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.

• 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. 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: Gasoline is highly flammable and its vapors can explode if ignited. Take the following precautions:

• 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 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.

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.
• Wear heavy long pants, boots, gloves and a long sleeve shirt. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. Secure hair above shoulder level.
• Adjust the handle to provide the best grip, if applicable.
• 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. Refer to Starting and Stopping.
• Use the right tool. Only use this tool for its intended purpose. Only use the unit as described in this manual.
• Always hold the unit with both hands when operating. Keep a firm grip on both handles or grips.
• Do not overreach. Always keep proper footing and balance. Take extra care when working on stairs, steep slopes or inclines. To avoid serious injury, do not operate the unit while on a ladder or a roof.
• Keep hands, face, and feet away from all moving parts. Do not touch or try to stop moving parts.
• Do not touch the engine, gear housing 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. 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. Make sure all moving parts come to a complete stop.
• Before setting the unit down, always make sure the engine is off and all moving parts have stopped.
• 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 dealer. 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.

TRIMMER SAFETY

• Only use the trimming line described in the Specifications section of this manual. Never use metal-reinforced line, wire, chain or rope. These can break off and become dangerous projectiles.
• Do not replace the cutting head with rigid or metal blades. Doing so could result in serious injury.
• The cutting head shield must always be in place while operating the unit.
• Do not operate the unit without both trimming lines extended and the proper line installed. Do not extend the trimming line beyond the length of the shield.
• The cutting head should remain stationary when the engine idles. If it does not, refer to Adjusting the Idle Speed.
• Make sure the cutting head is not in contact with anything before starting the unit.

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:

• Stop the unit. Refer to Starting and Stopping.

• Make sure all moving parts have stopped.
• Allow the unit to cool.

• 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

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

	SAFETY ALERT SYMBOLIndicates danger, warning or caution. May be used in conjunction with other symbols or pictographs.
	READ OPERATOR'S MANUALWARNING: 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 PROTECTIONWARNING: 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 PROTECTIONAlways wear heavy-duty, non-slip footwear when operating this unit.
	WEAR HAND PROTECTIONAlways wear heavy-duty, non-slip gloves when handling this unit.
	HANDLE POSITIONMake sure the handle is positioned beyond the end of the safety label.
	UNLEADED FUELAlways use clean, fresh unleaded fuel.
	OILRefer to operator's manual for the proper type of oil.
	DO NOT USE E85 FUEL IN THIS UNITCAUTION: It has been proven that fuel containing greater than 10% ethanol will likely damage this engine and void the warranty.

SYMBOL MEANING

	ON / OFF STOP CONTROLON / START / RUN
	ON / OFF STOP CONTROLOFF or STOP
	PRIMER BULBPush the primer bulb, fully and slowly, 10 times.
	CHOKE CONTROLFULL choke positionPARTIAL choke positionRUN choke position
	THROWN OBJECTS CAN CAUSE SEVERE INJURYWARNING:Small objects can be propelled at high speed, causing injury.
Min. 50 ft15 m	KEEP BYSTANDERS AWAYWARNING:Keep all bystanders, especially children and pets, at least 50 feet (15 m) from the operating area.
	HOT SURFACEWARNING: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 BLADEWARNING:There is a sharp blade on the cutting head shield. To prevent serious injury, do not touch the line cutting blade.
	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.

NOTE: The model depicted may differ from yours.

APPLICATIONS (AS A TRIMMER)\*

• Cutting grass and light weeds.
- Edging
• Decorative trimming around trees, fences, etc.
*Other optional attachments may be used with this unit.

ASSEMBLY TOOLS REQUIRED

- Flat-head screwdriver

Hanger Cap Muffler Spark Plug Starter Rope Grip Choke Lever Throttle Lockout On/Off Switch Handle Upper Shaft Housing Coupler Lower Shaft Housing Cutting Head Cutting Head Shield Line Cutting Blade Fuel Cap Oil Fill Plug Primer Bulb Electric Start Port (not included with all units) Air Filter Cover Shaft Grip Throttle Control

SPECIFICATIONS\*

Engine Type ....... Air-Cooled, 4-Cycle
Displacement.... 30 cc (1.83 cu. in.)
Spark Plug Gap 0.025 in. (0.635 mm)
Spark Plug (USA) ....Champion® RDZ4H or Equivalent Plug
Spark Plug (Canada).... Champion® QDZ4H or Equivalent Plug
Lubrication....SAE 30 Oil
Crankcase Oil Capacity 3.04 fl. oz. (90 ml)
Fuel Tank Capacity 15 fl. oz. (444 ml)
Approximate Unit Weight (No Fuel) (Varies by Model) 14 - 15 lbs. (6.4 - 6.8 kg)
Trimmer Mechanism (Varies by Model) ...... Bump Head or Fixed-Line Cutting Head
Trimming Line Diameter (Bump Head) 0.095 in. (2.41 mm)
Trimming Line (Fixed-Line Cutting Head)....0.095 in. (2.41 mm) or 0.105 in. (2.67 mm) Pre-Cut Line
Cutting Path Diameter (Bump Head).... 17 in. (43.2 cm)
Cutting Path Diameter (Fixed-Line Cutting Head) 17 in. (43.2 cm)

Canada: This spark ignition system complies with Canadian ICES-002.

* 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.

ASSEMBLY

INSTALLING THE CUTTING HEAD SHIELD

(For curved-shaft units)

WARNING: To prevent serious personal injury, never operate the unit without the cutting head shield in place.

1. Remove the wing nut and washer from the cutting head shield.
2. Insert the short tab (the one without a hole) on the mount bracket into the slot on the cutting head shield (Fig. 1).
3. Rotate the cutting head shield counterclockwise to align the hole on the cutting head shield with the hole on the mount bracket (Fig. 1).
4. Insert the square bolt into the hole underneath the cutting head shield (Fig. 2). Push the square bolt through the cutting head shield and mount bracket.
5. Place the washer onto the square bolt (Fig. 2).
6. Screw the wing nut onto the square bolt until the cutting head shield is firmly in place (Fig. 2).

Cutting Head Shield Slot Mount Bracket

Fig. 1

Cutting Head Shield Square Bolt Mount Bracket Wing Nut Washer

Fig. 2

INSTALLING THE CUTTING HEAD SHIELD

(For straight-shaft units)

WARNING: To prevent serious personal injury, never operate the unit without the cutting head shield in place.

1. Remove the wing nut and washer from the cutting head shield.
2. Insert the short tab (the one without a hole) on the mount bracket into the slot on the cutting head shield (Fig. 3).
3. Rotate the cutting head shield until the bolt on the cutting head shield protrudes through the hole on the mount bracket (Fig. 3).
4. Place the washer onto the bolt (Fig. 4).
5. Screw the wing nut onto the bolt until the cutting head shield is firmly in place (Fig. 4).

INSTALLING AND REMOVING THE ATTACHMENT

The coupler enables the use of various optional attachments.

	WARNING: Before 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 an attachment.

Installing the Attachment

1. Remove the hanger cap from the attachment. Keep the hanger cap for use when storing the attachment. If present, remove the gray spacer from the coupler.
2. Set the unit on a flat, level surface.
3. Turn the knob counterclockwise to loosen the coupler (Fig. 5).

4. Align the release button with the guide recess (Fig. 7).

5. Push the attachment straight into the coupler (Fig. 6) until the release button snaps firmly into the primary hole (Fig. 7).

6. Turn the knob clockwise to tighten the coupler (Fig. 5).

WARNING: Before operating the unit, make sure the release button is fully snapped into the primary hole and the knob is securely tightened.

WARNING: Unless specified otherwise, the release button should be snapped into the primary hole only. Using the wrong hole could lead to personal injury or damage to the unit.

Removing the Attachment

1. Set the unit on a flat, level surface.
2. Turn the knob counterclockwise to loosen the coupler (Fig. 5).
3. Press and hold the release button (Fig. 7).
4. Pull the attachment straight out of the coupler (Fig. 6).

Tighten Loosen Knob

Fig. 5

Coupler Attachment

Fig. 6

Primary Hole Release Button Guide Recess

Fig. 7

INSTALLING AND ADJUSTING THE HANDLE

Installing the Handle

1. Push the handle down onto the upper shaft housing (Fig. 8). Make sure the bolt hole faces to the right (Fig. 8).
2. Insert the bolt into the bolt hole and push it through (Fig. 8). Tighten the bolt with a flat-head screwdriver, but do not tighten the bolt completely.
3. Hold the unit in the operating position (Fig. 17). Move the handle up or down the upper shaft housing to a comfortable location (Fig. 8). Make sure the handle is positioned beyond the end of the safety label (Fig. 8).
4. Tighten the bolt with a flat-head screwdriver until the handle is secure.

Adjusting the Handle

If the handle requires adjustment:

1. Loosen the bolt with a flat-head screwdriver (Fig. 8).
2. Hold the unit in the operating position (Fig. 17). Move the handle up or down the upper shaft housing to a comfortable location (Fig. 8). Make sure the handle is positioned beyond the end of the safety label (Fig. 8).
3. Tighten the bolt with a flat-head screwdriver until the handle is secure.

Handle Safety Label Bolt Hole Upper Shaft Housing Bolt

Fig. 8

ASSEMBLING AND USING THE SHOULDER STRAP

Assembling the Shoulder Strap

1. Push the strap up through the center slot in the buckle (Fig. 9).
2. Bend the strap over and push it down through the lower slot in the buckle (Fig. 9).

Using the Shoulder Strap

1. Put the shoulder strap over the operator's head and onto the left shoulder.
2. Start the unit. Refer to Starting and Stopping.
3. Snap the clip onto the shoulder strap loop (Fig. 10A or Fig. 10B).
4. Adjust the shoulder strap to fit the operator (Fig. 11). Pull the buckle up to loosen the shoulder strap. Pull the strap down to tighten the shoulder strap.

Buckle Center Slot Clip Strap Lower Slot

Fig. 9

A Clip Clip Shoulder Strap Loop

Shoulder Strap Loop

Fig. 10

Buckle Strap

Fig. 11

OIL AND FUEL

USING THE RIGHT OIL

Use a high-quality SAE 30 weight oil. DO NOT use dirty oil. Failure to use clean oil of the correct type can cause premature engine wear and failure.

ADDING OIL: INITIAL USE

WARNING: DO NOT overfill the crankcase. OVERFILLING THE CRANKCASE MAY CAUSE SERIOUS PERSONAL INJURY.

NOTE: This unit was shipped without oil in the crankcase. Oil must be added before starting the unit. NOTE: Never add oil to the fuel tank. This unit has a four-cycle engine. DO NOT mix oil with gasoline.

1. Set the unit on a flat, level surface.
2. Unscrew the oil fill plug (Fig. 12).
3. Pour 3.04 fluid oz. (90 ml) of oil into the oil fill hole (Fig. 12).
   NOTE: This unit comes with a 3.04 fluid oz. (90 ml) container of oil.
   NOTE: DO NOT overfill. Refer to Checking the Oil Level.
4. Wipe up any oil that may have spilled.
5. Make sure the O-ring is in place on the oil fill plug (Fig. 12).
6. Reinstall the oil fill plug.

The use of old fuel is the most common cause of performance problems. Use only fresh, clean unleaded gasoline.

NOTE: This unit has a four-cycle engine. 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, forming acids when stored. ALWAYS use fresh fuel (less than 30 days old).

NOTE: Dispose of old fuel according to federal, state and local regulations.

Using Blended Fuels

If using a blended fuel:

• Always use fresh unleaded gasoline
- Use a fuel additive

CAUTION: 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.

Using Fuel Additives

Use a fuel additive to inhibit corrosion and minimize gum deposits. 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 fuel tank.

FUELING THE UNIT

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: Remove the fuel cap slowly to avoid injury from fuel spray. Never operate the unit without the fuel cap securely in place.

WARNING: Add fuel in a clean, well-ventilated outdoor area. Wipe up any spilled fuel immediately. Avoid creating a source of ignition for spilled fuel. Do not start the engine until fuel vapors dissipate.

1. Position the unit with the fuel cap facing up.
2. Slowly remove the fuel cap.
3. Place the fuel container spout into the fuel tank fill hole and fill the tank.
   NOTE: DO NOT overfill the tank.
4. Wipe up any fuel that may have spilled.
5. Reinstall the fuel cap.
6. Move the unit at least 30 ft. (9.1 m) from the fuel container and the fueling site before starting the engine.

Oil Fill Plug O-Ring Oil Fill Hole

Fig. 12

STARTING AND STOPPING

WARNING: Operate this unit only in a well-ventilated outdoor area. Carbon monoxide exhaust fumes can be lethal in a confined area.

WARNING: Avoid accidentally starting the unit. To avoid serious injury, the operator and the unit must be in a stable position when pulling the starter rope (Fig. 15).

STARTING INSTRUCTIONS

NOTE: To prevent the throttle control from being squeezed accidentally, this unit has a throttle lockout. The throttle control cannot be squeezed unless the throttle lockout is also engaged.

NOTE: There is no need to turn the unit on. The On/Off switch is in the On (1) position at all times (Fig. 13).

Before Starting the Unit

1. Check the oil level. Refer to Checking the Oil Level.
2. Fill the fuel tank. Refer to Fueling the Unit.
3. Put the shoulder strap over the operator's head and onto the left shoulder (Fig. 15).

Starting the Unit

PRIME:

1. Slowly press and release the primer bulb 10 times (Fig. 14). If fuel cannot be seen in the primer bulb, press and release the primer bulb until fuel is visible.
2. Move the choke lever to Position 1 (Fig. 14).
3. Crouch in the starting position (Fig. 15).
4. Press and hold the throttle lockout (Fig. 13). Squeeze and hold the throttle control (Fig. 13).

NOTE: Continue to SQUEEZE and HOLD the throttle lockout and the throttle control for ALL further steps.

1. Pull the starter rope with a controlled and steady motion 5 times (Fig. 15). DO NOT pull the starter rope more than 5 times.

START:

1. Move the choke lever to Position 2 (Fig. 14).
2. Pull the starter rope with a controlled and steady motion 5 to 10 times to start the engine.
3. Allow the engine to warm up for 60 seconds.
4. Move the choke lever to Position 3 (Fig. 14). Allow the engine to warm up for an additional 60 seconds. The unit may be used during this time.

NOTE: The engine is properly warmed up when it accelerates without hesitation.

IF... the engine hesitates, return the choke lever to Position 2 and continue the warm-up.

IF... the engine does not start, repeat the starting procedure.

IF... the engine fails to start after a few attempts: Move the choke lever to Position 3. Press and hold the throttle lockout. Squeeze and hold the throttle control. Pull the starter rope with a controlled and steady motion until the unit starts.

IF... the engine is already warm: Move the choke lever to Position 3. Press and hold the throttle lockout. Squeeze and hold the throttle control. Pull the starter rope with a controlled and steady motion until the unit starts.

After Starting the Unit

1. Snap the shoulder strap clip onto the shoulder strap loop. Adjust the shoulder strap to fit the operator. Refer to Assembling and Using the Shoulder Strap.

STOPPING INSTRUCTIONS

1. Release the throttle control and allow the engine to idle.
2. Press and hold the On/Off switch in the Off (O) position until the engine comes to a complete stop (Fig. 13).

On/Off Switch (I = On / O = Off) Throttle Lockout Throttle Control

Fig. 13

Choke Lever Primer Bulb 1 2 3 Position 1 Position 3Position 2

Fig. 14

Starter Rope Grip Starting Position Shoulder Strap Throttle Control

Fig. 15

USING THE ELECTRIC START ACCESSORY

Some units can be started with an optional electric start accessory (items sold separately). Electric-start-capable units are labeled as such and include an electric start port (Fig. 16).

Please contact your local retailer, call the Customer Support Department or visit our website for more information.

Read the Operator's Manual that came with the electric start accessory before attempting these instructions.

STARTING INSTRUCTIONS

NOTE: To prevent the throttle control from being squeezed accidentally, this unit has a throttle lockout. The throttle control cannot be squeezed unless the throttle lockout is also engaged.

NOTE: There is no need to turn the unit on. The On/Off switch is in the On (I) position at all times (Fig. 13).

Before Starting the Unit

1. Check the oil level. Refer to Checking the Oil Level.
2. Fill the fuel tank. Refer to Fueling the Unit.
3. Put the shoulder strap over the operator's head and onto the left shoulder (Fig. 15).

Starting the Unit

PRIME:

1. Slowly press and release the primer bulb 10 times (Fig. 14). If fuel cannot be seen in the primer bulb, press and release the primer bulb until fuel is visible.
2. Move the choke lever to Position 1 (Fig. 14).
3. Crouch in the starting position (Fig. 15).
4. Insert the electric start accessory into the electric start port (Fig. 16).
5. Press and hold the throttle lockout (Fig. 13). Squeeze and hold the throttle control (Fig. 13).

NOTE: Continue to SQUEEZE and HOLD the throttle lockout and the throttle control for ALL further steps.

1. Run the electric start accessory for 2 seconds. DO NOT run the electric start accessory for more than 2 seconds.

START:

1. Move the choke lever to Position 2 (Fig. 14).
2. Run the electric start accessory in intervals no longer than 2 seconds each until the unit starts.
3. Remove the electric start accessory from the unit, unless specified otherwise in the electric start accessory Operator's Manual.
4. Allow the engine to warm up for 60 seconds.
5. Move the choke lever to Position 3 (Fig. 14). Allow the engine to warm up for an additional 60 seconds. The unit may be used during this time.

NOTE: The engine is properly warmed up when it accelerates without hesitation.

IF... the engine hesitates, return the choke lever to Position 2 and continue the warm-up.
IF... the engine does not start, repeat the starting procedure.
IF... the engine fails to start after a few attempts: Move the choke lever to Position 3. Insert the electric start accessory into the electric start port. Press and hold the throttle lockout. Squeeze and hold the throttle control. Run the electric start accessory in intervals no longer than 2 seconds each until the unit starts. Remove the electric start accessory from the unit, unless specified otherwise in the electric start accessory Operator's Manual.
IF... the engine is already warm: Move the choke lever to Position 3. Insert the electric start accessory into the electric start port. Press and hold the throttle lockout. Squeeze and hold the throttle control. Run the electric start accessory in intervals no longer than 2 seconds each until the unit starts. Remove the electric start accessory from the unit, unless specified otherwise in the electric start accessory Operator's Manual.

After Starting the Unit

1. Snap the shoulder strap clip onto the shoulder strap loop. Adjust the shoulder strap to fit the operator. Refer to Assembling and Using the Shoulder Strap.

STOPPING INSTRUCTIONS

1. Release the throttle control and allow the engine to idle.
2. Press and hold the On/Off switch in the Off (O) position until the engine comes to a complete stop (Fig. 13).

Electric Start Port

Fig. 16

OPERATION

HOLDING THE UNIT

WARNING: Always wear eye, hearing, hand, foot and body protection to reduce the risk of injury when operating this unit.

WARNING: To prevent serious personal injury, avoid arm contact with the engine while operating the unit. The engine may be extremely hot.

• Stand in the operating position (Fig. 17). Stand up straight. Do not bend over.
• Keep feet apart and firmly planted.
• 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.
• Hold the unit at waist level.
• Position the cutting head a few inches above the ground.

Line drawing of a person using a manual lawn power tool (no text or symbols)

Fig. 17

ADJUSTING THE TRIMMING LINE LENGTH

(For units with bump heads)

If the unit is equipped with a bump head, trimming line can be released from the cutting head without stopping the engine. Before doing so, make sure the cutting head is loaded with line. Refer to the Line Replacement Addendum.

To release more line, lightly tap the bump knob on the ground (Fig. 18) while operating the unit at high speed. For best results, tap the bump knob on bare ground or hard soil. Attempting to release line in tall grass may stall the engine.

NOTE: Do not rest the cutting head on the ground while the unit is running.

Each time the bump knob is tapped, about 1 inch (25.4 mm) of trimming line is released.

NOTE: Always keep the trimming line fully extended. Line release becomes more difficult when the cutting line gets shorter.

A blade in the cutting head shield will cut the line to the proper length if any excess line is released.

WARNING: Do not remove or alter the line cutting blade assembly. Excessive line length will make the unit overheat. This may lead to serious personal injury or damage to the unit.

Bump Knob

Fig. 18

TIPS FOR BEST RESULTS

- For most operations, cut from side to side.

- The direction that clippings are thrown depends upon the rotation of the cutting head. To direct clippings away from the operator:

- Clockwise rotation: Tilt the cutting head slightly down to the left; cut from right to left whenever possible.

- Counterclockwise rotation: Tilt the cutting head slightly down to the right; cut from left to right whenever possible.

• Cut tall grass (over 8 inches (20cm)) from the top down by lowering the cutting head onto the grass.

- Cut with the tip of the trimming line.

- Cut in small increments. Move slowly. Do not force the unit.

- Do not trim wet grass or weeds.

NOTE: Some line breakage will occur from:

• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick vegetation
• Forcing the line into objects such as walls or fence posts

DECORATIVE TRIMMING

When trimming around trees, posts, fences, etc., rotate the whole unit so that the cutting head is at a 30^ angle to the ground (Fig. 19).

30°

Fig. 19

EDGING

The trimmer attachment can be used for edging (Fig. 20). Alternatively, a bladed lawn edger attachment can also be purchased for use with this unit.

Rotating the Trimmer Attachment

WARNING: To avoid serious personal injury and damage to the unit, shut the unit off before rotating the attachment.

When edging around sidewalks, flowerbeds, etc., rotate the trimmer attachment 90^ inside the coupler. DO NOT rotate the entire unit 90^ .

1. Turn the knob counterclockwise to loosen the coupler (Fig. 21).
2. Press and hold the release button (Fig. 21).
3. Rotate the attachment until the release button snaps firmly into the 90° edging hole (Fig. 21).
4. Turn the knob clockwise to tighten the coupler (Fig. 21).

WARNING: Only snap the release button into the 90° edging hole when edging with the trimmer attachment. Using the 90° edging hole with other attachments could lead to personal injury or damage to the unit.

Maintaining the Trimming Line

Hard surfaces, such as sidewalks, can cause the trimming line to wear down quickly or break.

• Frequently check the trimming line length.

• Bump Head: Always keep the trimming line fully extended. Refer to Adjusting the Trimming Line Length.
  • Fixed-Line Head: Replace the trimming line as needed. Refer to the Line Replacement Addendum.

- DO NOT force the unit. Make shallow cuts in as many passes as are necessary to achieve the desired depth. Cut at a slow, even pace.

Line drawing of a person using a lawn power shaver to cut grass, no text or symbols present

Fig. 20

Release Button 90° Edging Hole Knob

Fig. 21

MAINTENANCE

WARNING: To avoid serious personal injury, always stop the engine and allow it to cool before cleaning or maintaining the unit. Never perform cleaning or maintenance while the unit is running. Disconnect the spark plug wire to prevent the unit from starting accidentally.

WARNING: Wear protective clothing and observe all safety instructions to prevent serious personal injury.

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 the unit to an authorized service dealer. Refer to the Service / Warranty Supplement for more information.

NOTE: Maintenance, replacement, or repair of the emission control devices and system may be performed by an authorized service dealer. Refer to the Service / Warranty Supplement for more information.

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.

FREQUENCY MAINTENANCE REQUIRED
Every 10 hours • Clean and re-oil the air filter. Refer to Maintaining the Air Filter.
After the first 10 hours and at 38 hours	• Change the oil. Refer to Changing the Oil.• Have the rocker arm clearance checked by an authorized service dealer.• Check the spark plug condition and gap. Refer to Maintaining the Spark Plug.

REPLACING THE TRIMMING LINE

Refer to the Line Replacement Addendum for complete instructions.

CHECKING THE OIL LEVEL

WARNING: Check the oil level before each use. The importance of maintaining the proper oil level cannot be overemphasized.

1. Stop the engine and allow it to cool.
2. Set the unit on a flat, level surface, such as a workbench or table. The cutting head shield should hang over the edge so that the engine is level (Fig. 22).

NOTE: Failure to keep the engine level may result in oil overfill.

1. Clean the area around the oil fill plug (Fig. 23) to prevent debris from entering the oil fill hole (Fig. 23).
2. Unscrew the oil fill plug.
3. Look into the oil fill hole; use a flashlight if necessary. The oil level should just touch the bottom thread of the oil fill hole (Fig. 24).

- If the oil level is too low, add a small amount of oil to the oil fill hole until the oil is at the correct level.

WARNING: DO NOT overfill the crankcase. OVERFILLING THE CRANKCASE MAY CAUSE SERIOUS PERSONAL INJURY.

- If the oil level is too high, tip the unit and drain the excess oil into an appropriate container (Fig. 25).

1. Wipe up any oil that may have spilled.
2. Make sure the O-ring is in place on the oil fill plug (Fig. 23).
3. Reinstall the oil fill plug.

Line drawing of a mechanical tool on an inclined plane, no text or symbols present

Fig. 22

Oil Fill Plug O-Ring Oil Fill Hole

Fig. 23

Oil Fill Hole Bottom Thread Maximum Oil Level

Fig. 24

CHANGING THE OIL

Change the oil while the engine is still warm. The oil will flow freely and carry away more impurities.

1. Clean the area around the oil fill plug (Fig. 23) to prevent debris from entering the oil fill hole.
2. Unscrew the oil fill plug.
3. Tip the unit vertically to pour the oil out of the oil fill hole and into a container (Fig. 25). Allow ample time for complete drainage.

NOTE: Dispose of the old oil according to federal, state and local regulations.

1. Wipe up any oil that may have spilled.
2. Pour 3.04 fl.oz. (90 ml) of SAE 30 oil into the oil fill hole (Fig. 23).

WARNING: DO NOT overfill the crankcase.

OVERFILLING THE CRANKCASE MAY CAUSE SERIOUS PERSONAL INJURY. Refer to Checking the Oil Level.

1. Wipe up any oil that may have spilled.
2. Make sure the O-ring is in place on the oil fill plug (Fig. 23).
3. Reinstall the oil fill plug.

Line drawing of a mechanical device with a stand and cylindrical base (no text or symbols)

Fig. 25

MAINTAINING THE AIR FILTER

Failure to maintain the air filter can result in poor performance or can cause permanent damage to the engine. Engine failure due to improper air filter maintenance is not covered by the product warranty.

Cleaning the Air Filter

1. Open the air filter cover: press in the lock tab and swing the air filter cover up (Fig. 26).
2. Remove the air filter from the air filter housing (Fig. 26).
3. Wash the air filter in detergent and water. Rinse the air filter thoroughly and allow it to dry.
4. Lightly coat the air filter with clean SAE 30 oil.
5. Squeeze the air filter to spread and remove excess oil.
6. Reinstall the air filter in the air filter housing (Fig. 26).

NOTE: Operating the unit without the air filter and air filter cover will VOID the warranty.

1. Close the air filter cover: insert the tabs on the air filter housing into the slots on the air filter cover. Swing the air filter cover down and press it closed until the lock tab snaps into place (Fig. 26).

Air Filter Cover Slots Air Filter Tabs Lock Tab Air Filter Housing

Fig. 26

ADJUSTING THE IDLE SPEED

WARNING: The cutting head may spin during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

If the engine will not idle properly:

1. Start the engine. Refer to Starting and Stopping.

2. Release the throttle control and let the engine idle.

3. If the engine stops, increase the idle speed. Use a small Phillips screwdriver to turn the idle speed screw clockwise, 1/8 of a turn at a time, until the engine idles smoothly (Fig. 27).

4. If the cutting head spins when the engine idles, reduce the idle speed. Turn the idle speed screw counterclockwise, 1/8 of a turn at a time, until the cutting head stops moving (Fig. 27).

Idle Speed Screw

e Speed Screw

Fig. 27

MAINTAINING THE SPARK PLUG

WARNING: Do not sand blast, scrape or clean spark plug electrodes. Grit in the engine could damage the cylinder.

1. Stop the engine and allow it to cool. Grasp the spark plug boot firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the cylinder head with a 5/8-inch socket, turning counterclockwise.
3. Inspect the spark plug. If the spark plug is cracked, fouled or dirty, replace it with:

• USA: replacement part #794-00082, a Champion RDZ4H or an equivalent spark plug.
• Canada: replacement part #794-00098, a Champion QDZ4H or an equivalent spark plug.

1. Use a feeler gauge to set the air gap at 0.025 in. (0.635 mm) (Fig. 28).

2. Install the spark plug in the cylinder head. Tighten the spark plug with a 5/8-inch socket, turning it clockwise until snug.

NOTE: If using a torque wrench, torque to:

110-120 in.·lb. (12.3-13.5 N·m). Do not over tighten.

1. Reattach the spark plug boot.

0.025 in. (0.635 mm)

Fig. 28

CLEANING AND STORAGE

CLEANING

WARNING: To avoid serious personal injury, always stop the engine and allow it to cool before cleaning or maintaining the unit.

• Use a small brush to clean 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.
  • Wipe off any moisture with a soft cloth.

STORAGE

WARNING: Store the unit out of the reach of children. Lock up the unit to prevent unauthorized use or damage.

WARNING: Store the unit in a dry, well-ventilated area. Never store a fueled unit where fumes may reach an open flame or spark. Allow the engine to cool before storing.

- To suspend the attachment from a hook, install the hanger cap onto the attachment. Make sure the release button is securely locked into one of the holes on the hanger cap.

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. Reinstall the fuel cap.
2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5 drops of any high-quality motor oil into the cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.
4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and tighten loose screws, nuts or bolts.

Preparing the Unit for Use after Long-term Storage

1. Remove the spark plug. Tip the unit and drain all of the oil from the cylinder into an approved container. Reinstall the spark plug.
2. Change the oil. Refer to Changing the Oil.

NOTE: Do not use fuel that has been stored for more than 30 days. Dispose of old fuel and oil according to federal, state and local regulations.

TROUBLESHOOTING

PROBLEM SOLUTION

THE ENGINE WILL NOT START
The fuel tank is empty Fill the fuel tank with fresh fuel
The primer bulb was not pressed enough Press the	primer bulb 10 times or until fuel is visible
The fuel is old (over 30 days) Drain the fuel tank and	add fresh fuel
The spark plug is fouled Replace the spark plug

THE ENGINE WILL NOT IDLE
The air filter is dirty Clean or replace the air filter
The fuel is old (over 30 days) Drain the fuel tank and add fresh fuel
The idle speed is incorrect Adjust the idle speed

THE ENGINE WILL NOT ACCELERATE
The fuel is old (over 30 days) Drain the fuel tank and add fresh fuel
The cutting head is bound with grass Stop the engine and clean the cutting head
The air filter is dirty Clean or replace the air filter
PROBLEM SOLUTION

THE ENGINE LACKS POWER OR STALLS
The fuel is old (over 30 days) Drain the fuel tank and add fresh fuel
The air filter is dirty Clean or replace the air filter
The spark plug is fouled Replace the spark plug

THE CUTTING HEAD WILL NOT ADVANCE LINE (FOR BUMP HEADS ONLY)
The cutting head is bound with grass Stop the engine and clean the cutting head
The cutting head is out of line Refill the cutting head with new line
The inner reel is bound up Rewind the line
The cutting head is dirty Clean the inner reel and outer spool
The line is welded	Open the cutting head and remove the welded section
The line is twisted Rewind the line
Not enough line is extended	Stop the unit, push the bump knob and pull the line until 4 inches (102 mm) is outside of the cutting head

THE CUTTING LINE ADVANCES UNCONTROLLABLY (FOR BUMP HEADS ONLY)
There is oil, cleaner or lubricant in the cutting head	Clean and thoroughly dry the cutting head

If further assistance is required, contact an authorized service center.

NOTES

TABLE DES MATIÈRES

Sécurité....38

Trou principal Bouton ressort Niche-guide

Fig. 7

INSTALLATION ET RÉGLAGE DE LA POIGNÉE

INSTRUCTIONS D'ARRÊT

INSTRUCTIONS D'ARRÊT

Illustration of a person using a long-handled lawn power tool (no text or symbols present)

Fig. 17

RÉGLAGE DE LA LONGUEUR DU FIL

Line drawing of a person using a lawn power shaver to clean or manage equipment (no text or symbols present)

Fig. 20

REPLACEMENT DU FIL DE COUPE

Line drawing of a mechanical tool on a target with no text or symbols

Fig. 22

Line drawing of a mechanical device with a stand and cylindrical base (no text or symbols)

Fig. 25

Illustration of a person using a manual lawn power tool (no text or symbols)

Fig. 17

AJUSTAR LA LONGITUD DE LA LÍNEA DE CORTE

Line drawing of a person using a lawn power shaver to cut a slope (no text or symbols)

Fig. 20

Line drawing of a mechanical tool on a target with no text or symbols

Fig. 22

Line drawing of a mechanical device with a stand and cylindrical base (no text or symbols)

Fig. 25

MANTENIMIENTO DEL FILTRO DE AIRE

Black and white barcode image with vertical lines above and below the bars

769-26133-00