Troy-Bilt TB425CS, TB490BC, TB475SS User Manual

Operator’s Manual

TB425CS

&

TB475SS

4-Cycle Gas Trimmers

IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY

P/N 769-02485A

(12/06)

INTRODUCTION

THANK YOU

Thank you for buying this quality product. This modern outdoor power tool will provide many hours of useful service. You will find it to be a great labor-saving device. This operator’s manual provides you with easy-to- understand operating instructions. Read the whole manual and follow all the instructions to keep your new outdoor power tool in top operating condition.

PRODUCT REFERENCES, ILLUSTRATIONS AND SPECIFICATIONS

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© 2006 MTD SOUTHWEST INC, All Rights Reserved.

SERVICE INFORMATION

Service on this unit both within and after the warranty period should be performed only by an authorized and approved service dealer.

For service call 1-800-828-5500 to obtain a list of authorized service dealers near you. For more details about your unit, visit our website at www.troybilt.com.

DO NOT RETURN THE UNIT TO THE RETAILER. PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.

Before beginning, locate the unit’s model plate. It lists the model and serial numbers of your unit. Refer to the sample plate below and copy the information for future reference.

	MODEL :
S/N :	ITEM :

Copy the model and parent part number here:

Copy the serial number here:

Make sure you carefully read and understand this manual before starting or operating this equipment.

THIS PRODUCT IS COVERED BY ONE OR MORE U.S. PATENTS. OTHER PATENTS PENDING.

TABLE OF CONTENTS

Service Information . . . . . . . . . . . . . . . . . . . . . . . . .2 Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . .3 Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .7 Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . .8 Starting/Stopping Instructions . . . . . . . . . . . . . . . .10 Operating Instructions . . . . . . . . . . . . . . . . . . . . . .11 Maintenance and Repair Instructions . . . . . . . . . . .13 Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . .20 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . .21 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Warranty Information . . . . . . . . . . . . . . . . . . . . . . .24 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E26

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

#180890 Spark Arrestor Kit.

CALIFORNIA PROPOSITION 65 WARNING

WARNING

THE ENGINE EXHAUST FROM THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.

2

RULES FOR SAFE OPERATION

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

SAFETY ALERT: Indicatesdanger, warning or caution. Attention is required in order to avoid serious personal injury. May be used in conjunction with other symbols or pictographs.

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

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.

FOR QUESTIONS, CALL 1-800-828-5500

SYMBOL MEANING

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.

• IMPORTANT SAFETY INSTRUCTIONS •

READ ALL INSTRUCTIONS

BEFORE OPERATING

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.

•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 guided by an adult.

•All guards and safety attachments must be installed properly before operating the unit.

•Inspect the unit before use. Replace damaged parts. Check for fuel leaks. 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.

•Be aware of the risk of injury to the head, hands and feet.

•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.

•Use only 0.095 inch, 2.41 mm diameter original equipment manufacturer replacement line. 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

WARNING: Gasoline is highly flammable, and its

vapors can explode if ignited. Take the following precautions:

approved for the storage of such materials.

•Avoid creating a source of ignition for spilled fuel. Do not start the engine until fuel vapors dissipate.

3

RULES FOR SAFE OPERATION

•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. Never operate the unit without the fuel cap securely in place. Loosen the fuel tank cap slowly to relieve any pressure in the tank.

•Add fuel in a clean, well-ventilated outdoor area where there are no sparks or flames. Remove the fuel cap slowly, and only after the engine stops. Do not smoke while fueling. Wipe up any spilled fuel from the unit immediately.

•Avoid creating a source of ignition for spilled fuel. Do not start the engine until fuel vapors dissipate.

•Move the unit at least 30 feet (9.1 m) from the fueling source and site before starting the engine. Do not smoke. Keep sparks and open flames away from the area while adding fuel or operating the unit.

WHILE OPERATING

•Never start or run the unit inside a closed room or building. Breathing exhaust fumes can be fatal. Operate this unit only in a well-ventilated outdoor area.

•Wear safety glasses or goggles that meet ANSI Z87.1 standards and are marked as such. Wear ear/hearing protection when operating this unit. Wear a face 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.

•The cutting attachment shield must always be in place while operating the unit as a trimmer. 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 handle to your size in order 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. Refer to Starting/Stopping Instructions.

•Use the right tool. Only use this tool for its intended purpose.

•Do not overreach. Always keep proper footing and balance.

•Always hold the unit with both hands when operating. Keep a firm grip on both handles 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 rotates.

•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 engine faster than the speed needed to cut, trim or edge. Do not run the engine at high speed when 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. Do not operate the unit with loose or damaged parts.

•Stop the unit, switch the engine to off, and disconnect the spark plug for maintenance or repair.

•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 a faulty muffler and spark arrestor. Keep the engine and muffler free from grass, leaves, excessive grease or carbon build up.

OTHER SAFETY WARNINGS

•Never store a fueled unit inside a building where fumes may reach an open flame or spark.

•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, 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 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

4

RULES FOR SAFE OPERATION

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 and maintenance and repair information.

SYMBOL	MEANING	SYMBOL	MEANING
	• SAFETY ALERT SYMBOL		• ON/OFF STOP CONTROL

Indicates danger, warning, or caution. May be used in conjunction with other symbols or pictographs.

•WARNING - READ OPERATOR'S MANUAL

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.

•KEEP BYSTANDERS AWAY

WARNING: Keep all bystanders, especially children and pets, at least 50 feet (15 m.) from the operating area.

•UNLEADED FUEL

Always use clean, fresh unleaded fuel.

•THROWN OBJECTS AND ROTATING CUTTER CAN CAUSE SEVERE INJURY

WARNING: Do not

operate without the cutting attachment shield in place.

Keep away from the rotating cutting attachment.

ON / START / RUN

•ON/OFF STOP CONTROL

OFF or STOP

•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.

•OIL

Refer to operator's manual for the proper type of oil.

5

KNOW YOUR UNIT

APPLICATIONS

As a trimmer:

•Cutting grass and light weeds

•Edging

•Decorative trimming around trees, fences, etc.

Other optional accessories may be used with your unit. Refer to Operating the EZ-Link System for a list of add-ons.

NOTE: The below illustration may differ slightly from your unit. For example, the picture shows a straight shaft. Your unit may have a curved shaft.

J-Handle

(TB425CS Only)

Spark Arrestor

Spark Plug

Muffler

Muffler Guard

Fuel Cap

Starter Rope Grip

Shaft Grip

Throttle

Control

D-Handle

(TB475SS Only)

Spark Plug

EZ-Link™

Air Filter Cover

Primer Bulb

Shaft Housing

Cutting Attachment

Shield

Line Cutting Blade

Oil Fill Plug / Dipstick

Cutting Attachment

6

ASSEMBLY INSTRUCTIONS

For TB475SS only: ADJUST THE D-HANDLE

The TB475SS uses a D-handle only, which is preinstalled on the unit. If you ever need to adjust it, make sure it is at least 6 inches from the end of the shaft grip (Fig. 1).

Shaft

Housing

Shaft Grip

Minimum 6 inches (15.24 cm)

Bottom Clamp

Fig. 1

For TB425CS only:

THE J-HANDLE

1.Place the J-handle between the top and middle clamp pieces (Fig. 2).

(4) Screws

Top Clamp	J-Handle
Middle Clamp
Bottom Clamp	Nuts
	Fig. 2

2.While holding the three pieces together, install the four

(4) screws through the top clamp and into middle clamp.

NOTE: The holes in the top and middle clamp will line up only when assembled correctly.

3.Place the clamps and the J-handle over the shaft housing and onto the bottom clamp.

4.Hold each hex nut in the bottom clamp recess with a finger. Start screws with a large Phillips screwdriver. Do not tighten until you make the handle adjustment.

5.Slide the J-handle in or out until the arrow/white line on the decal touches the clamp assembly (Fig. 3). You must first loosen the screws if the handle is pre-installed.

Decal

Fig. 3

6.While holding the unit in the operating position (Fig. 27), position the J-handle to the location that provides you the best grip.

7.Tighten the clamp screws evenly, until the J-handle is secure.

7

OIL AND FUEL INFORMATION

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.

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 3.4 fluid oz. (100 ml.) bottle of SAE 30 SF, SG, SH oil (Fig. 16).

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. 16).

Funnel Spout

2.Place the unit on a flat level surface (Fig. 18).

3.Remove the oil plug / dipstick from the crankcase (Fig. 17).

O-Ring

Oil Fill Plug/Dipstick

Oil Fill Hole

Fig. 17

4.Pour the entire bottle of oil into the oil fill hole (Fig. 18).

Oil Fill

Fig. 18

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 / dipstick.

Check oil before each use and change as needed. Refer to Changing the Oil.

Fig. 16

8

OIL AND FUEL INFORMATION

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 60 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

Using Fuel Additives

The use of fuel additives, such Stabilizer or an equivalent, will minimize the formation of gum

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.

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.

1. Remove the fuel cap (Fig. 19).

WARNING: Remove fuel cap slowly to avoid injury

from fuel spray. Never operate the unit without the fuel cap securely in place.

Unleaded

Gasoline

Gas

Fuel Tank

Fig. 19

2.Place the gas container’s spout into the fill hole on the fuel tank (Fig. 19) and fill the tank.

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.

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 to Federal, State and Local regulations.

9

STARTING/STOPPING INSTRUCTIONS

WARNING: Operate this unit only in a wellventilated 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. 22). To avoid serious injury, the operator and unit must be in a stable position while starting.

Make sure that any Add-On item is installed correctly and secure before starting the unit.

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 Stop Control is in the ON (I) position at all times (Fig. 20).

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever (Fig. 23) down to the start/closed position and continue to step 3. DO NOT flip this lever down if the temperature is above 40°F.

3.Fully press and release the primer bulb 10 times, slowly. Some amount of fuel should be visible in the primer bulb and fuel lines (Fig. 21). If you can’t see fuel in the bulb, press and release the bulb as many times as it takes before you can see fuel in it.

4. With the unit in the starting position, do not squeeze the throttle control (Fig. 22). Pull the starter rope out a short distance, until you feel some resistance. This is usually around 2-4 inches. Then pull the rope smoothly and briskly. Repeat this 5 times. The engine should start

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever back up to the run/open position.

5.Squeeze the throttle control to warm up the engine for 15 to 30 seconds. In cold weather, let the engine warm up for 30 to 60 seconds.

IF... The engine does not start, go back to step 3.

IF... The engine stops while you are squeezing the throttle, go back to step 4.

STOPPING INSTRUCTIONS

1.Release your hand from the throttle control. Allow the engine to cool down by idling.

2.Put the On/Off Stop Control in the OFF (O) position.

Stop/Off (O)

Start/On (I)

Throttle Control

		Fig. 20
	Cold Weather
	Start Lever	Primer
	(Fig. 23)
		Bulb

Fig. 21

Starter Rope

Throttle Control

Fig. 22

Run/ Open

Cold

Weather

Start Lever

Close/ Start

Fig. 23

10

OPERATING INSTRUCTIONS

OPERATING THE EZ-LINK™ SYSTEM

The EZ-Link™ system enables the use of these optional Add-Ons:

Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBGC

Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBLE

Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . . TBAH

Straight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . . . TBSS

Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBTB

Pole Saw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TBPS

Brushcutter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TBBC*

*Do NOT use this attachment with an electric powered unit.

WARNING: Before you begin using any

attachment, read and understand the manual that came with the attachment. Follow all safety information contained within.

Removing the Cutting Attachment or Add-On

1.Turn the knob counterclockwise to loosen (Fig. 24).

2.Press and hold the release button (Fig. 24).

3.While firmly holding the upper shaft housing, pull the cutting attachment or add-on straight out of the EZ-Link™ coupler (Fig. 25).

WARNING: To avoid serious personal injury and

damage to the unit, shut the unit off before removing or installing add-ons.

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. 24).

EZ-Link™ Coupler	Release Button

Knob

Guide Recess

Fig. 24

2.While firmly holding the add-on, push it straight into the EZ-Link™ coupler (Fig. 25).

NOTE: Aligning the release button with the guide recess will help installation (Fig. 24).

Release Button

EZ-Link™ Coupler

Primary Hole

Upper Shaft Housing

Lower Shaft Housing

Fig. 25

3. Turn the knob clockwise to tighten (Fig. 24).

CAUTION: Lock the release button in the primary

hole and securely tighten the knob before operating this unit.

90˚ Edging Hole

(Trimmer Only)

Knob

Fig. 26

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.

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. 26).

11

OPERATING INSTRUCTIONS

HOLDING THE TRIMMER

WARNING: Always wear eye, hearing, foot and

body protection to reduce the risk of injury when operating this unit.

Before operating the unit, stand in the operating position (Fig. 27). 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

Fig. 27

ADJUSTING TRIMMING LINE LENGTH

The Bump Head™ cutting attachment allows you to release trimming line without stopping the engine. To release more line, lightly tap the cutting attachment on the ground (Fig. 28) 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 Bump 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 Bump Head™ on the ground while the unit is running.

CAUTION: 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. 28

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.

•Cut from right to left.

•Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a forwardbackward 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. 29).

Fig. 29

12

MAINTENANCE AND REPAIR INSTRUCTIONS

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.

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.

	FREQUENCY	MAINTENANCE REQUIRED	REFER TO
	Before starting engine	Fill fuel tank with fresh fuel	Page 12
		Check oil	Page 16
	Every 10 hours	Clean and re-oil air filter	Page 17
	First change at 10 hours	Change oil	Page 16
	Every 25 hours thereafter	Change oil	Page 16
	Every 25 hours	Clean spark arrestor	Page 20
	10 hours on new engine	Check rocker arm to valve clearance and adjust	Page 18
	Every 25 hours	Check rocker arm to valve clearance and adjust	Page 18
	Every 25 hours	Check spark plug condition and gap	Page 20

SPEEDSPOOL™ LINE INSTALLATION

Always use original equipment manufacturer 0.095 inch (2.41 mm) replacement line. Lines other than those specified may make the engine overheat or fail.

WARNING: Never use metalreinforced line, wire,

chain or rope. These can break off and become dangerous projectiles.

There are two methods to replace the SpeedSpool® trimming line:

•Wind the inner reel with new line

•Install a pre-wound inner reel

Winding the Inner Reel With New Line

NOTE: It Is unnecessary to remove the bump knob to install a new trimming line.

1.Cut two pieces of 0.095 inch (2.41 mm) trimming line, 10 feet (3 m) long.

2.Hold the outer spool and turn the inner reel counterclockwise to line up the arrows on the outer spool and inner reel (Fig. 41).

WARNING: Always use the correct line length

when installing trimming line on the unit. The line may not release properly if the line is too long.

Top View Of The SpeedSpool®

Arrows

Outer Spool

Inner Reel

Bump Knob

Fig. 41

3.Pull old line out of the line loading and line locking holes (Fig. 42 and 43).

4.Insert a piece of trimming line straight into one of the two eyelets in the outer spool. Push it up through the line loading hole in the inner reel (Fig. 42). Do not bend the line when inserting it into the eyelet.

13

MAINTENANCE AND REPAIR INSTRUCTIONS

Trimming Line

Eyelet

Line Loading Hole

Fig. 42

5.Insert the line into the locking hole (Fig. 43). Do not push the line more than a 1/2 inch (12.7 mm) into the line locking hole. The line will form a small loop

(Fig. 43) when it is inserted correctly.

Line Locking Hole

Fig. 43

6.Pull the line from the outer spool until the line is tight against the inner reel (Fig. 44).

Fig. 44

7.Repeat procedures 4-6 with the second piece of line.

8.Hold the outer spool. Wind the inner reel counterclockwise until approximately four (4) inches (102 mm) of line remain (Fig. 45).

NOTE: Do not wind the inner reel before installing the second piece of line.

Fig. 45

9.If winding the line becomes difficult or if the line jams, pull the ends of the line from the spool (Fig. 46). Continue winding the inner reel

counterclockwise until approximately 6 inches of line is left.

Fig. 46

INSTALLING A PRE-WOUND REEL

1.Turn the bump knob counterclockwise and remove the bump knob, spring and foam seal (Fig. 47).

Bump Knob

Foam Seal

Spring

Inner Reel

Fig. 47

2.Pull the old inner reel with existing line from the outer spool.

3.Insert the ends of the prewound inner reel line into the outer spool eyelets (Fig. 48). Push the new inner reel, arrow side up, into the outer spool.

14

MAINTENANCE AND REPAIR INSTRUCTIONS

Fig. 48

4.Hold the inner reel in place and install the bump knob, spring and foam seal (Fig. 47). Press down and turn the bump knob clockwise. Grasp the ends and pull firmly to release the line from the holding slots in the inner reel.

Releasing the Inner Reel

If the SpeedSpool® does not release line correctly, pull the ends of the line firmly from the spool (Fig. 46). If this does not the release line, follow the Cleaning the SpeedSpool® instructions.

CLEANING THE SPEEDSPOOL®

Cleaning the SpeedSpool® may be necessary if:

•A jammed or excessive line must be removed

•The SpeedSpool® becomes difficult to wind or does not operate correctly when bumping the head on the ground

1.Hold the outer spool, and unscrew the bump knob counterclockwise (Fig. 49).

2.Pull out the bump knob, spring and foam seal (Fig. 47).

Inner Reel

Fig. 50

5.Clean the shaft and the inner surface of the outer spool. To clean the shaft underneath the plunger, press down on the plunger (Fig. 51). Remove any dirt or debris from the shaft.

Shaft

Plunger

Fig. 51

NOTE: The inner reel must be totally dry before reinstalling it into the outer spool. Do not lubricate the inner reel or outer spool assembly.

6.Place the inner reel into the outer spool.

7.Place the bump knob, spring and foam seal into the inner reel (Fig. 47).

8.Press the bump knob down and tighten clockwise.

9.Install new line as described in Line Installation for the SpeedSpool®.

Fig. 49

3.Pull the inner reel with existing line from the outer spool (Fig. 48).

4.Remove any existing line from the inner reel before cleaning. Remove any debris or grass from the knob, spring, inner reel and foam seal. Wash the inner reel with warm soapy water (Fig. 50).

15

MAINTENANCE AND REPAIR INSTRUCTIONS

CHECKING THE OIL LEVEL

CAUTION: To prevent extensive engine wear and

damage to the unit, always maintain the proper oil level in the crankcase. Never operate the unit with the oil level below the bottom of the dipstick.

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/dipstick before removing it.

4.Remove the oil fill plug/dipstick and wipe off oil. Reinsert it all the way back in.

5.Remove the oil fill plug/dipstick and check the oil level. Oil should be up to the top of the dipstick (Fig. 52).

Oil Fill Plug/Dipstick

O-Ring

Full

Add 1.4-1.5 Oz.

(41-44 ml)

Top of Dipstick

Fig. 52

6.If the level is low, add a small amount of oil to the oil fill hole and recheck (Fig. 53). Repeat this procedure until the oil level reaches the top of the dipstick.

NOTE: Do not overfill the unit.

O-Ring

Oil Fill Plug/Dipstick

Oil Fill Hole

Fig. 53

NOTE: Make sure the O-ring is in place on the oil fill plug/dipstick when checking and changing the oil (Fig. 53).

CHANGING THE OIL

For a new engine, change the oil after the first 10 hours of operation. Change the oil while the engine is still warm. The oil will flow freely and carry away more impurities.

1. Unplug spark plug boot to prevent accidental starting.

CAUTION: Wear gloves to prevent injury when

handling the unit.

2.Remove the oil fill plug/dipstick.

3.Pour the oil out of the oil fill hole and into a container by tipping the unit to a vertical position (Fig. 54). Allow ample time for complete drainage.

Fig. 54

4.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.

5.Refill the crankcase with 3.4 fluid ounce (100 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. 55). Check the level with the dipstick. If the level is low, add a small amount of oil and recheck. Do not overfill (Fig. 55).

Fill Level

Fig. 55

6.Replace the oil fill plug/dipstick.

7.Reconnect the spark plug boot.

16

MAINTENANCE AND REPAIR INSTRUCTIONS

AIR FILTER MAINTENANCE

Cleaning the Air Filter

Clean and re-oil the air filter every 10 hours of operation. It is an important item to maintain. Failure to maintain your air filter properly can result in poor performance or can cause permanent damage to your engine.

WARNING: To avoid serious personal injury,

always turn the unit off and allow it to cool before you clean or service it.

1.Open the air filter cover. Push the tab on the right side of the cover inward. Then pull the air filter cover out and to the left (Fig. 56).

NOTE: It may be necessary to remove the fuel cap to completely remove the air filter cover.

2. Remove the air filter (Fig. 56).

Air Filter

Air Filter Cover

Tab

Fig. 56

3.Wash the filter in detergent and water (Fig. 57). Rinse the filter thoroughly and allow it to dry.

4.Apply enough clean SAE 30 motor oil to lightly coat the filter (Fig. 58).

Fig. 57				Fig. 58

5.Squeeze the filter to spread and remove excess oil (Fig. 59).

Fig. 59

6. Replace the filter (Fig. 60).

NOTE: If the unit is operated without the air filter, you will VOID the warranty.

Back Plate

Back Plate Slot

Slots

Fig. 60

7.Reinstall the air filter cover. Position the hooks on the left side of the air filter cover into the slots at the left side of the back plate (Fig. 60).

NOTE: It may be necessary to remove the fuel cap to reinstall the air filter cover.

8.Swing the cover to the right until the tab on the air filter cover snaps into place in the slot on the back plate (Fig. 60).

9.Replace the fuel cap if it was removed.

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable. An idle adjustment screw is reached though a hole in the top of the engine cover (Fig. 61).

NOTE: Careless adjustments can seriously damage your unit. An authorized service dealer should make carburetor adjustments.

Check Fuel

Old fuel is usually the reason for improper unit performance. Drain and refill the tank with fresh fuel prior to making any adjustments. Refer to Oil and Fuel Information.

17

MAINTENANCE AND REPAIR INSTRUCTIONS

Clean Air Filter

The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow. This is often mistaken for an out of adjustment carburetor. Check the condition of the air filter before adjusting the idle speed screw. Refer to Air Filter Maintenance.

Adjust Idle Speed Screw

WARNING: The cutting attachment may spin

during idle speed adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

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/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. 61). 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.

Idle Adjustment Screw

Fig. 61

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.

WARNING: To prevent serious personal injury,

make sure the cutting attachment has stopped rotating before you turn it off and set it down.

ROCKER ARM CLEARANCE

This requires disassembly of the engine. If you feel unsure or unqualified to perform this, take the unit to an authorized service center.

NOTE: Inspect the valve to rocker arm clearance with a feeler gauge after the first 10 hours of operation and then every 25 hours of operation thereafter.

•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 muffler cover by pressing down on it, separating it from the engine cover. Using a flat blade screwdriver, disengage the middle and front tabs and slots first. The cover will hinge off from the rear tab (Fig. 62).

Engine Cover

Rear Slot

and Tab

Middle Tab

	Front Tab
Middle Slot	Front Slot

Fig. 62

2.Remove the two (2) screws on top of the engine cover with a Flat-head or T-25 Torx screwdriver (Fig. 63).

Top View Of The Engine	Remove
Engine Cover	Screws

Muffler

Fig. 63

18

MAINTENANCE AND REPAIR INSTRUCTIONS

3. Remove the screw behind the engine cover (Fig. 64).

Screw

Fig. 64

4.Disconnect the spark plug wire.

5.Clean dirt from around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8 in. socket counterclockwise.

6.Remove the engine cover (Fig. 63).

7.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. 65). Remove the rocker arm cover and gasket.

Rocker Arm Cover

Spark Plug Hole

Fig. 65

8.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. 65)

•Both rocker arms move freely, and both valves are closed

If these statements are not true, repeat this step.

9.Slide the feeler gauge between the rocker arm and the valve return spring. Measure the clearance between the valve stem and rocker arm (Fig. 66). Measure both the intake and exhaust valves.

The recommended clearance for the intake and exhaust is .003 – .006 in. (.076 – 0.152 mm).

Use a standard automotive feeler gauge at .005 (0.127mm). The feeler gauge should slide between the rocker arm and valve stem with a slight amount of resistance, without binding. Figure 67 shows how to measure the clearance.

Adjusting Nuts

Rocker Arms

INTAKE

EXHAUST

Feeler Gauge

Fig. 66

Exhaust

Adjusting Nut

Exhaust

Rocker Arm

Exhaust

Clearance:

.003-.006 in.

(.076-0.152 mm)

Intake Valve	Feeler Gauge
Stem
Intake Clearance:
.003–.006 in.
(.076–0.152 mm)	Exhaust Valve Stem
	Fig. 67

10.If the clearance is not within specification:

a.Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 67).

•To increase clearance, turn the adjusting nut counterclockwise.

•To decrease clearance, turn the adjusting nut clockwise.

b.Recheck both clearances, and adjust as necessary.

11.Reinstall the rocker arm cover using a new gasket. Torque the screw to 20–30 in•lb (2.2–3.4 N•m).

12.Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten screws.

13.Reinstall the muffler cover. Slip the rear tab on the muffler cover into the engine cover rear slot. Then slide the remaining slots into the tabs until they snap into place (Fig. 62).

14.Check the spark plug and reinstall. See Replacing the Spark Plug.

15.Replace the spark plug wire.

19

MAINTENANCE AND REPAIR INSTRUCTIONS

REPLACING THE SPARK PLUG

Use a replacement part number 180852 spark plug. The correct air gap is 0.025 in. (0.635 mm.). Remove the plug after every 25 hours of operation and check its condition.

1.Stop the engine and allow it to cool. Grasp the plug wire firmly and pull the cap from the spark plug.

2.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. 68).

0.025 in.

(0.635 mm.)

Fig. 68

WARNING: Do not sand blast, scrape or clean

electrodes. Grit in the engine could damage the cylinder.

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.

SPARK ARRESTOR MAINTENANCE

1.Remove the muffler cover. See Rocker Arm Clearance.

2.With a flat blade screwdriver or Torx T-20 bit, remove the screw attaching the spark arrestor cover to the muffler (Fig. 69).

Muffler

Spark Arrestor Screen

Tab Screw

Spark Arrestor Cover

Slot

Fig. 69

3.Pull the tab on the spark arrestor cover out of the muffler. Remove the spark arrestor cover.

4.Remove the spark arrestor screen from the spark arrestor cover.

5.Clean the spark arrestor screen with a wire brush or replace it.

6.Reinstall the spark arrestor screen, spark arrestor cover and screw.

CLEANING

WARNING: To avoid serious personal injury,

always turn your unit off and allow it to cool before you clean or service it.

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.

LONG TERM STORAGE

1.Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more than 60 days. Dispose of the old gasoline in accordance to 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 to 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.

TRANSPORTING

•Allow the engine to cool before transporting.

•Secure the unit while transporting.

•Drain the gas tank before transporting.

•Tighten gas cap before transporting.

20

TROUBLESHOOTING

ENGINE WILL NOT START

C A U S E

Empty fuel tank

Primer bulb wasn't pressed enough

Old fuel

Fouled spark plug

Plugged spark arrestor

When it is above 40°F outside & the Cold Weather Start Lever is in the CLOSED / START position

When it is below 40°F outside & the Cold Weather Start Lever is in the RUN / OPEN position

A C T I O N

Fill fuel tank with new fuel

Press primer bulb fully and slowly 10 times Drain gas tank and add fresh fuel

Replace or clean the spark plug

Clean or replace spark arrestor

Flip the Cold Weather Start Lever to RUN / OPEN

Flip the Cold Weather Start Lever to CLOSED / START and follow the Starting Instructions

ENGINE WILL NOT IDLE

C A U S E	A C T I O N
Air filter is plugged	Replace or clean the air filter
Old fuel	Drain gas tank and add fresh fuel
Improper carburetor adjustment	Adjust carburetor

ENGINE WILL NOT ACCELERATE

C A U S E	A C T I O N
Old fuel	Drain gas tank and add fresh fuel
Improper carburetor adjustment	Take to an authorized service dealer for adjustment
Cutting attachment bound with grass	Stop the engine and clean the cutting attachment
Dirty air filter	Clean or replace the air filter
Plugged spark arrestor	Clean or replace spark arrestor

ENGINE LACKS POWER OR STALLS WHEN CUTTING

C A U S E	A C T I O N
Old fuel	Drain gas tank and add fresh fuel
Improper carburetor adjustment	Take to an authorized service dealer for adjustment
Fouled spark plug	Replace or clean the spark plug
Plugged spark arrestor	Clean or replace spark arrestor

CUTTING ATTACHMENT WILL NOT ADVANCE LINE

C A U S E	A C T I O N
Cutting attachment bound with grass	Stop the engine and clean cutting attachment
Cutting attachment out of line	Refill with new line
Inner reel bound up	Replace the inner reel
Cutting head dirty	Clean inner reel and outer spool
Line welded	Disassemble, remove the welded section and rewind
Line twisted when refilled	Disassemble and rewind the line
Not enough line is exposed	Push the bump knob and pull out line until 4 inches
	(102 mm) of line is outside of the cutting attachment

CUTTING LINE ADVANCES UNCONTROLLABLY

C A U SE	A C T I O N
Oil, cleaner or lubricant in cutting head	Clean and thoroughly dry the cutting head

If further assistance is required, contact your authorized service dealer.

21

	SPECIFICATIONS
ENGINE*
Engine Type ...........................................................................................................................................	Air-Cooled, 4-Cycle
Displacement ..........................................................................................................................................	1.6 cu. in. (26.2 cc)
Clutch Type...........................................................................................................................................................	Centrifugal
Operating RPM .........................................................................................................................................	6,800 - 9,300 rpm
Idle Speed RPM........................................................................................................................................	2,800 - 3,600 rpm
Ignition Type ...........................................................................................................................................................	Electronic
Ignition Switch..................................................................................................................................................	Rocker Switch
Valve clearance ......................................................................................................................	.003–.006 in. (.076–.152 mm))
Spark Plug Gap..................................................................................................................................	0.025 inch (0.635 mm)
Lubrication.............................................................................................................................................................	SAE 30 Oil
Crankcase Oil Capacity .................................................................................................................................	3.4 oz (100 ml)
Fuel.........................................................................................................................................................................	Unleaded
Carburetor ........................................................................................................................................	Diaphragm, All-Position
Starter ................................................................................................................................................................	Auto Rewind
Muffler.......................................................................................................................................................	Baffled with Guard
Throttle ................................................................................................................................................	Manual Spring Return
Fuel Tank Capacity .........................................................................................................................................	12 oz (355 ml)

DRIVE SHAFT AND CUTTING ATTACHMENT*

Drive Shaft Housing............................................................................................................................		Steel Tube (EZ-Link™)
Throttle Control..........................................................................................................................................		Finger-Tip Trigger
Approximate Unit Weight (No fuel, with handle, shield and cutting attachment)		........................................... 13.5 lbs (6 kg)
Cutting Mechanism:	TB425CS & TB475SS: ......................................................................	Dual String Cutting Head
Line Spool ..............................................................................................................................................		Bump Line Releaser
Line Spool Diameter:	TB425CS & TB475SS: ..............................................................................	3 inches (76.2 mm)
Trimming Line Diameter:	TB425CS & TB475SS .........................................................................	0.095 inches (2.41 mm)
TB425CS & TB475SS Cutting Path Diameter......................................................................................		17 inches (43.18 cm)

*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.

22

NOTES

23