Ryobi Outdoor 790r User Manual

0 (0)

790r

2-Cycle Gas Trimmer/Brushcutter

OPERATOR’S MANUAL

FOR QUESTIONS, CALL 1-800-345-8746 in U.S. or 1-800-668-1238 in CANADA www.RyobiOutdoor.com

IMPORTANT MANUAL

DO NOT THROW AWAY

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.

Bump Head™ is a trademark of MTD SOUTHWEST INC. SplitLine™ is a trademark of MTD SOUTHWEST INC.

SERVICE INFORMATION

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

• Call 1-800-345-8746 in the United States, or 1-800-668-1238 in Canada, to obtain a list of authorized service dealers near you

• Go to www.RyobiOutdoor.com on the World Wide Web for a list of authorized service dealers

DO NOT RETURN THE UNIT TO THE RETAILER.

NOTE: PROOF OF PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.

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

THIS PRODUCT IS COVERED BY ONE OR MORE US PATENTS, OTHER PATENTS PENDING.

	TABLE OF CONTENTS
I.	California Proposition 65 Warning . . . . . . . . . . . .	. . . . 3
II.	Rules for Safe Operation . . . . . . . . . . . . . . . . . . . .	. 3-7
	A. Important Safety Information . . . . . . . . . . . . . .	. . . 4
	B. Safety and International Symbols . . . . . . . . . .	. . . 6
	C. Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . .	. . . 7
III.	Assembly Instructions . . . . . . . . . . . . . . . . . . . . . .	8-10
	A. Install and Adjust the J handle . . . . . . . . . . . .	. . . 8
	B. Install the Harness . . . . . . . . . . . . . . . . . . . . . .	. . . 8
	C. Remove and Install the Attachment Shield . . .	. . . .8
	D. Remove the Cutting Attachment and
	Install the Cutting Blade . . . . . . . . . . . . . . . . . .	. . .9
	E. Remove the Cutting Blade and
	Install the Cutting Attachment . . . . . . . . . . . . .	. . .10
IV. Oil and Fuel Information . . . . . . . . . . . . . . . . . . . .		. . 11
V.	Starting/Stopping Instructions . . . . . . . . . . . . . . . .	. 12
VI. Operating Instructions . . . . . . . . . . . . . . . . . . . .		13-15
	A. Operating the EZ-Link System . . . . . . . . . . . .	. . .13
	B. Holding the Trimmer . . . . . . . . . . . . . . . . . . . .	. . 14
	C. Adjusting Trimming Line Length . . . . . . . . . . .	. . 14
	D. Tips for Best Trimming Results . . . . . . . . . . . . .	. 14
	E. Decorative Trimming . . . . . . . . . . . . . . . . . . . .	. . 15
	F. Using the Cutting Blade . . . . . . . . . . . . . . . . . . .	. .15
VII. Maintenance and Repair Instructions . . . . . . . . .		16-21
	A. Maintenance Schedule . . . . . . . . . . . . . . . . . . .	. 16
	B. Line Installation . . . . . . . . . . . . . . . . . . . . . . . .	. . 16
	C. Installing a Prewound Reel . . . . . . . . . . . . . . . .	. 18
	D. Air Filter Maintenance . . . . . . . . . . . . . . . . . . . .	. 18
	E. Spark Arrestor Maintenance . . . . . . . . . . . . . . .	. .19
	F. Carburetor Adjustment . . . . . . . . . . . . . . . . . .	. . 20
	G. Replacing the Spark Plug . . . . . . . . . . . . . . . .	. . 20
	H. Long Term Storage . . . . . . . . . . . . . . . . . . . . . .	. . 21
	I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 21
	J. Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 21
	K. Accessories/Replacement Parts . . . . . . . . . . .	. . .21
VIII. Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . .		. 22
IX. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 23

X. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

XI. Parts List . . . . . . . . . . . . . . . . . . . . . .Inside Back Cover

CONTENTS OF CARTON

• Model 790r Trimmer/Brushcutter

∆Large Bump Head Cutting Attachment

∆4-Tooth Brush Blade

∆J-Handle and Hardware

•Cutting Attachment Shield with Hardware

•Shoulder Harness

•Locking Rod Tool

•Operator's Manual

•Product Registration Card

•Bottle of 2-Cycle Oil

∆This item will either be installed on the unit or in the hardware pack

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.

SPARK ARRESTOR

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 #182747 Spark Arrestor Kit.

WARNING!

Read the Operator’s Manual(s) and follow all warnings and safety instructions. Failure to do so can result in serious injury to the operator and/or bystanders.

FOR QUESTIONS, CALL 1-800-345-8746 IN U.S. OR 1-800-668-1238 in CANADA

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

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

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

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.

RULES FOR SAFE OPERATION

• IMPORTANT SAFETY INFORMATION •

READ ALL INSTRUCTIONS

WARNING: When using the unit, you must follow the safety rules. For your own safety and that of bystanders, please read these instructions before operating the unit. Please keep the instructions for later use.

BEFORE OPERATING

•Read the instructions carefully. Be familiar with the controls and proper use of the unit.

•Do not operate this unit when tired, ill or under the influence of alcohol, drugs or medication.

•Children under the age of 15 must not use the unit; teens may operate the unit with adult guidance.

•Inspect the unit before use. Replace damaged parts. Check for fuel leaks. Make sure all fasteners are in place and secure. Replace cutting attachment parts that are cracked, chipped or damaged in any way. Make sure the cutting attachment is properly installed and securely fastened. Be sure that the cutting attachment shield is properly attached, and positioned as recommended. Failure to do so can result in personal injury to the operator and bystanders, as well as damage to the unit.

•Use only 0.095 inch (2.41 mm) diameter Genuine Factory Parts™ replacement line. Never use metalreinforced line, wire, chain or rope. These can break off and become dangerous projectiles.

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

•Clear the area to be cut before each use. Remove rocks, broken glass, nails, wire, string and other objects which may be thrown or become entangled in the cutting attachment. 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.

SAFETY WARNINGS FOR GAS TRIMMERS

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 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 or mixing fuel. 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 J-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.

RULES FOR SAFE OPERATION

•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 Genuine Factory Parts™ 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.

WHILE OPERATING WITH CUTTING BLADE

•Read and understand all safety warnings before operating this unit.

•Always use the shoulder harness when using the brush blade accessory.

•Keep the J-handle between the operator and cutting attachment or blade at all times.

•NEVER cut when the cutting blade is 30 inches (76 cm) or more above the ground level.

•Blade thrust may occur when the spinning blade contacts an object that it does not immediately cut. Blade thrust can be violent enough to propel the unit and/or operator in any direction, possibly causing a loss of control. Blade thrust can occur without warning if the blade snags, stalls or binds. This is more likely to occur in areas where it is difficult to see the material being cut.

•For operation with the brush blade, do not cut anything thicker than 1/2 inch or a violent kickback could occur.

•Do not attempt to touch or stop the blade when it is rotating.

•A coasting blade can cause injury while it continues to spin after the engine is stopped or the throttle trigger is released. Maintain proper control until the blade has completely stopped rotating.

•Do not run the unit at high speed when not cutting.

•If you strike or become entangled with a foreign object, stop the engine immediately and check for damage. Have any damage repaired before attempting further operations. Do not operate unit with a bent, cracked or dull blade. Discard blades that are bent, warped, cracked or broken.

•Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to break off while in use. This can result in severe personal injury. Replace the blade.

•Do not use the cutting blade for edging or as an edger; severe personal injury to yourself or others may incur. Use the cutting blade only for the purpose described in this manual.

•Stop the engine IMMEDIATELY if you feel excessive vibration. Vibration is a sign of trouble. Inspect thoroughly for loose nuts, bolts or damage before continuing. Repair or replace affected parts as necessary.

After Use

•Clean cutting blades with a household cleaner to remove any gum buildup. Oil the blade with machine oil to prevent rust.

•Lock up and store the cutting blade in an appropriate area to protect the blade from unauthorized use or damage.

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

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.		OFF or STOP
	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 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.

• OIL

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

• ON/OFF STOP CONTROL

ON / START / RUN

•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.

• HOT SURFACE WARNING

Do not touch a hot muffler, gear housing or cylinder. You may get burned. These parts get extremely hot from operation.

They remain hot for a short time after the unit is turned off.

• SHARP BLADE

WARNING: Sharp blade on cutting attachment shield. To prevent serious injury, do not touch line cutting blade.

•BRUSHCUTTERS • REPLACE DULL BLADE

Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to break off while in use. This can result in severe personal injury.

•TRIMMER/BRUSHCUTTER SAFETY

WARNING: Thrown objects and rotating cutter can cause severe injury. Keep bystanders, especially children and pets, at least 50 feet (15 m) away from the cutting area. The cutting attachment shield must be used when using the trimmer cutting attachment.

RULES FOR SAFE OPERATION

KNOW YOUR UNIT

APPLICATIONS

As a trimmer:

•Cutting grass and light weeds

•Edging

•Decorative trimming around trees, fences, etc.

As a brushcutter:

•Cutting weeds and light bush of up to 1/2 inch in diameter

Other optional accessories may be used with the 790r. Refer to Operating the EZ-Link System for a list of add-ons.

Fuel Cap

On/Off Stop Control

Throttle Lock-Out

Starter Rope Grip

Support Fitting

Shaft Grip

Throttle Control

Throttle	J-Handle
Control
	EZ-Link™
EZ-Start	Blade Shield /
Lever	Shield Mount

Shaft

Housing

Cutting Blade

Cutting Attachment Shield

Primer Bulb	Gear Housing

Muffler

Spark Plug

Air Filter/Muffler	Line Cutting Blade
Cover

Cutting Attachment

ASSEMBLY INSTRUCTIONS

On some units, the J-handle may be pre-installed. In this case you must loosen screws and adjust the handle to fit the operator. Go to step 5 if the J-handle is pre-installed.

INSTALL AND ADJUST THE J-HANDLE

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

(4) Screws

Top Clamp	J-Handle
Middle Clamp
Bottom Clamp	Nuts
	Nuts
	Fig. 1

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. 2). You must first loosen the screws if the handle is pre-installed.

Decal

Fig. 2

6.While holding the unit in the operating position (Fig. 3), position the J-handle to the location that provides you the best grip.

Fig. 3

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

INSTALL THE HARNESS

WARNING: Always use the shoulder harness when using the cutting blade to avoid serious personal injury.

1.Push the strap through the center of the buckle.

2.Pull the strap over the cross bar and down through the slot in the buckle (Fig. 4).

3.Put the harness on over head and onto shoulder. Snap it on to the support fitting (Fig. 5).

4.Adjust length to fit the operator’s size. Pull tab to lengthen, pull strap to shorten (Fig 6).

Fig. 4

Support Fitting

Fig. 5

Fig. 6

REMOVE AND INSTALL THE CUTTING ATTACHMENT SHIELD

Remove the cutting attachment shield when using the unit as a brushcutter

WARNING: The cutting attachment shield should NOT be installed when operating the unit with a blade. Remove the cutting attachment shield before removing or installing the blade.

Remove the cutting attachment shield from the shield mount by removing the three (3) screws with a flat blade screwdriver (Fig. 7). Store parts for future use.

ASSEMBLY INSTRUCTIONS

Cutting	(3) Screws
Attachment	(3) Screws
Shield

Gear Housing

Shield Mount

Fig. 7

Install the cutting attachment shield when using the unit as a grass trimmer

WARNING: To avoid serious personal injury, the cutting attachment shield MUST be in place at all times while operating the unit as a grass trimmer.

Install the cutting attachment shield on the shield mount by inserting the three (3) screws into the shield mount. Tighten securely with a flat blade screwdriver (Fig. 7).

REMOVE THE CUTTING ATTACHMENT AND INSTALL THE CUTTING BLADE

NOTE: To make cutting blade removal and installation easier, place the unit on the ground or on a work bench.

Remove the Cutting Attachment Shield

See Remove and Install the Cutting Attachment Shield.

Remove the Cutting Attachment

WARNING: The gear housing gets hot with use. It can result in injury to the operator. The housing remains hot for a short time even after the unit is turned off. Do not touch the gear housing until it has cooled.

1.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the shaft bushing hole (Fig. 8).

Output Shaft

Shaft Bushing Hole

Locking Rod Slot

Output Shaft

Bushing

Locking Rod

Fig. 8

2.Hold the locking rod in place by grasping it next to the boom of the unit (Fig. 9).

3.While holding the locking rod, remove the cutting attachment by turning it clockwise off of the output shaft (Fig. 10). Store the cutting attachment for future use.

NOTE: The blade retainer under the cutting attachment will be used when installing the cutting blade.

Fig. 9

Cutting Attachment

Locking Rod

Slot

Locking Rod

Fig. 10

Install the Cutting Blade

WARNING: To avoid serious personal injury, always wear gloves while handling or installing the blade.

4.Place the cutting blade on the output shaft bushing (Fig. 11).

Blade Retainer

Nut

Cutting

Blade

Shield

Mount

Pilot Hole

Output Shaft

Bushing

Locking Rod

Fig. 11

ASSEMBLY INSTRUCTIONS

5.Make sure that the cutting blade is centered on the pilot step and sitting flat against the output shaft bushing (Fig. 12).

WARNING: If the cutting blade is offcenter, the unit will vibrate and the blade may fly off, causing possible serious personal injury.

Pilot Step

REMOVE THE CUTTING BLADE AND INSTALL THE CUTTING ATTACHMENT

WARNING: To avoid serious personal injury, always wear gloves while handling or installing the blade.

Remove the Cutting Blade

1.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the bushing hole (Fig. 8).

2.Hold the locking rod in place by grasping it next to the boom of the unit (Fig. 14).

3.While holding the locking rod, loosen the nut on the blade by turning it clockwise with a 5/8 inch closedend or socket wrench (Fig. 14).

Fig. 12

6.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the bushing hole (Fig. 8).

7.Put the blade retainer and nut on the output shaft. Make sure that the blade is installed correctly.

8.Tighten nut counterclockwise against the blade while holding the locking rod:

•If using a torque wrench and an 5/8 inch socket tighten to: 325 - 335 in•lb, 27 - 28 ft.•lb, 37 - 38 N•m.

•Without a torque wrench, use a 5/8 inch closed-end or socket wrench, turning the nut until the blade retainer is snug against the shaft bushing. Make sure that the blade is installed correctly, then rotate the nut an additional 1/4 to 1/2 turn counterclockwise (Fig. 13).

1/4-1/2 turn Counterclockwise

Fig. 13

9. Remove the locking rod from the locking rod slot.

WARNING: To avoid serious personal injury or damage to the unit, do not start or operate this unit with the locking rod in the locking rod slot.

WARNING: Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to break off while in use. This can result in severe personal injury. Replace the blade.

Clockwise

Fig. 14

4.Remove the nut, blade retainer and blade. Store the nut and blade together for future use in a secure place. Store out of children’s reach.

Install the Cutting Attachment

5.Align the shaft bushing hole with the locking rod slot and insert the locking rod into the shaft bushing hole (Fig. 8). Place the blade retainer on the output shaft with the flat surface against the output shaft bushing (Fig. 15). Screw the cutting attachment counterclockwise onto the output shaft. Tighten securely.

NOTE: The blade retainer must be installed on the output shaft in the position shown for the cutting attachment to work correctly.

Cutting Attachment

Blade Retainer

Output Shaft

Bushing

Locking Rod

Fig. 15

6.Remove the locking rod.

7.Install the cutting attachment shield. Refer to Remove and Install the Cutting Attachment Shield.

WARNING: To avoid serious personal injury, the cutting head guard MUST be in place at all times while operating the unit as a trimmer.

OIL AND FUEL INFORMATION

OIL AND FUEL MIXING INSTRUCTIONS

Old and/or improperly mixed fuel are the main reasons for the unit not running properly. Be sure to use fresh, clean unleaded fuel. Follow the instructions carefully for the proper fuel/oil mixture.

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. It forms acids when stored. When using alcohol-blended fuel, use fresh fuel (less than 60 days old).

Using Blended Fuels

If you choose to use a blended fuel, or its use is unavoidable, follow recommended precautions:

•Always use the fresh fuel mix explained in your operator's manual

•Always agitate the fuel mix before fueling the unit

•Drain the tank and run the engine dry before storing the unit

Using Fuel Additives

The bottle of 2-cycle oil that came with your unit contains a fuel additive which will help inhibit corrosion and minimize the formation of gum deposits. It is recommended that you use our 2-cycle oil with this unit.

If unavailable, use a good 2-cycle oil designed for air-cooled engines along with a fuel additive, such as STA-BIL® Gas Stabilizer or an equivalent. 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.

CAUTION: For proper engine operation and maximum reliability, pay strict attention to the oil and fuel mixing instructions on the 2-cycle oil container. Using improperly mixed fuel can severely damage the engine.

Thoroughly mix the proper ratio of 2-cycle engine oil with unleaded gasoline in a separate fuel can. Use a 32:1 fuel/oil ratio. Do not mix them directly in the engine fuel tank. See the table below for specific gas and oil mixing ratios.

NOTE: One gallon (3.8 liters) of unleaded gasoline mixed with one 4 oz. (120 ml.) bottle of

2-cycle oil makes a 32:1 fuel/oil ratio.

UNLEADED GAS	2 CYCLE OIL
1 US. GALLON + 4.0 FL. OZ.
(3.8 LITERS)	(120 ml)

1 LITER + 30 ml

MIXING RATIO - 32:1

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 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 area outdoors. 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: Dispose of the old fuel/oil mix in accordance to Federal, State and Local regulations.

STARTING/STOPPING INSTRUCTIONS

STARTING 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. 18). To avoid serious injury, the operator and unit must be in a stable position while starting.

To avoid serious personal injury, ensure any Add-On being used is installed correctly and secure before starting unit.

1.Mix gas with oil. Fill fuel tank with fuel/oil mixture. Refer to Oil and Fuel Mixing Instructions.

2.Make sure the On/Off Stop Control is in the ON (I) position (Fig. 16).

3.Fully press and release the primer bulb 10 times, slowly, until FUEL IS VISIBLE IN THE PRIMER BULB (Fig. 17). If you can’t see fuel in the bulb, press and release the bulb three (3) additional times, or as many times as it takes before you can see fuel in it.

4.Push the EZ-Start™ Lever to the left until it clicks and locks into place (Fig. 17).

5.While the unit is in the starting position (Fig. 18), DO NOT SQUEEZE THE THROTTLE CONTROL. Pull the starter rope briskly 5 times, making sure the EZ-Start™ lever is pushed to the left. If the engine starts to run before the fifth pull, proceed to step 6.

NOTE: When starting, the EZ-Start™ Lever will automatically click off when you squeeze the throttle control.

6.Squeeze the throttle control for 5 to 10 seconds in order to warm up the engine. The EZ-Start™ Lever will click off automatically (Fig. 17).

NOTE: If the engine stalls while squeezing the trigger, go back to step 5.

STOPPING INSTRUCTIONS

1.Release your hand from the throttle control (Fig. 18). Allow the engine to cool down by idling.

2.Put the On/Off Stop Control in the OFF (O) position (Fig. 16).

On/Off Stop Control

Stop/Off (O)

Start/On (I)

Throttle Lock-Out

Throttle Control

Fig. 16

Primer Bulb

EZ-Start™

Lever

Starter Rope

Throttle Control

Fig. 18

OPERATING INSTRUCTIONS

OPERATING THE EZ-LINK™ SYSTEM

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

Blower/Vacuum . . . . . . . . . . . . . . . . . . . . . . . . . . BV720r Cultivator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GC720r Edger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LE720r Hedge Trimmer . . . . . . . . . . . . . . . . . . . . . . . . . . HS720r Snow Thrower . . . . . . . . . . . . . . . . . . . . . . . . . . . ST720r Straight Shaft Trimmer . . . . . . . . . . . . . . . . . . . . SS725r Tree Pruner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TP720r Turbo Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . TB720r

WARNING: Read and understand the operator’s manual for each add-on prior to operation.

Removing the Cutting Attachment or Add-Ons

1.Turn the knob counterclockwise to loosen (Fig. 19).

2.Press and hold the release button (Fig. 19).

3.While firmly holding the upper shaft housing, pull the cutting attachment or add-on straight out of the EZ-Link™ coupler (Fig. 19).

WARNING: To avoid serious personal injury and damage to the unit, shut off the unit 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. 20).

EZ-Link™ Coupler	Release Button

Knob

Guide Recess

Fig. 19

2.While firmly holding the add-on, push it straight into the EZ-Link™ coupler (Fig. 20).

NOTE: Aligning the release button with the guide recess will help installation (Fig. 19).

Release Button

EZ-Link™ Coupler

Primary Hole

Upper Shaft Housing

Lower Shaft Housing

Fig. 20

3. Turn the knob clockwise to tighten (Fig. 21).

CAUTION: Lock the release button in the primary hole and securely tighten the knob before operating this unit

90˚ Edging Hole

(Trimmer Only)

180˚ Edging Hole

(Trimmer Only)

Knob

Fig. 21

CAUTION: The cutting attachment and addons with the EZ-Link™ system are to be used in the primary hole unless stated otherwise in the specific add-ons operator’s manual. 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 or the 180° edging hole (Fig. 21).

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. 22). 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 J-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

Once you are in the operating position, hook the shoulder strap to the unit.

Fig. 22

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. 23) 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.

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 left to right whenever possible. Cutting to the right improves the unit's cutting efficiency. Clippings are thrown away from the operator.

•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 trimming techniques (explained above)

•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.

Fig. 23

OPERATING INSTRUCTIONS

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. 24).

Fig. 24

USING THE CUTTING BLADE

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

WARNING: Do not use the cutting blade for edging or as an edger. Severe personal injury to yourself or others can result.

Before operating the unit with the cutting blade, stand in the operating position (Fig. 25). Refer to Holding the Trimmer.

Cutting Blade Operating Tips

To establish a rhythmic cutting procedure:

•Plant feet firmly, comfortably apart.

•Bring the engine to full throttle before entering the material to be cut. At full throttle the blade has maximum cutting power and is less likely to bind, stall or cause blade thrust (which can result in serious personal injury to the operator or others).

WARNING: Blade thrust may occur when the spinning blade contacts an object that it does not immediately cut. Blade thrust can be violent enough to cause the unit and/or operator to be propelled in any direction, and possibly lose control of the unit. Blade thrust can occur without warning if the blade snags, stalls or binds. This is more likely to occur in areas where it is difficult to see the material being cut.

•Cut while swinging the upper part of your body from right to left.

•Always release the throttle trigger and allow the engine to return to idle speed when not cutting.

•When you are finished, always unsnap the unit from the harness before taking off the harness.

WARNING: The blade continues to spin after the engine is turned off. The coasting blade can seriously cut you if accidentally touched.

•Swing the unit in the same direction as the blade spins, which increases the cutting action.

•After the return swing, move forward to the next area to be cut plant your feet again.

•The cutting blade is designed with a second cutting edge. You can use it by removing the blade, turning it upside down, and reinstalling it.

WARNING: Do not sharpen the cutting blade. Sharpening the blade can cause the blade tip to break off while in use. This can result in severe personal injury to yourself or others. Replace the blade.

To reduce the chance of material wrapping around the blade, follow these steps:

•Cut at full throttle

•Swing the unit into material to be cut from your right to your left (Fig. 26)

•Avoid the material just cut as you make the return swing

WARNING: Do not clear away any cut material with the engine running or blade turning. To avoid serious personal injury, turn off the engine. Allow the blade to stop before removing materials wrapped around the blade shaft.

Fig. 25

Fig. 26

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.

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.

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.

In order to assure peak performance of your engine, inspection of the engine exhaust port may be necessary after 50 hours of operation. If you notice lost RPM, poor performance or general lack of acceleration, this service may be required. If you feel your engine is in need of this inspection, refer service to any non-road engine repair establishment, individual or authorized service dealer for repair. DO NOT attempt to perform this process yourself as engine damage may result from contaminants involved in the cleaning process for the port.

FREQUENCY	MAINTENANCE REQUIRED	REFER TO

Before starting engine	Fill fuel tank with fresh fuel	Page 11

Every 10 hours	Clean and re-oil air filter	Page 18

Every 25 hours	Check and clean spark arrestor	Page 19
Every 25 hours	Check spark plug condition and gap	Page 20
	Check spark plug condition and gap	Page 20

Every 50 hours	Inspect exhaust port and spark arrestor screen for clogging or	Page 19
Every 50 hours	obstruction to assure maximum performance levels	Page 19
	obstruction to assure maximum performance levels

LINE INSTALLATION

This section covers both SplitLine™ and standard single line installation.

Always use Genuine Factory Parts™ 0.095 in. (2.41 mm) replacement line. Line other than the specified may make the engine overheat or fail.

WARNING: Never use metal-reinforced line, wire, chain or rope. These can break off and become dangerous projectiles.

There are two methods to replace the trimming line:

•Wind the inner reel with new line

•Install a prewound inner reel

Winding the Existing Inner Reel

1. and unscrew the inside

Outer Spool

Spring

Inner Reel

Bolt

Bump Knob

Fig. 27

2.Remove the inner reel from the outer spool (Fig. 27).

3.Remove spring from the inner reel (Fig. 27).

4.Use a clean cloth to clean the the inner reel, spring, shaft and inner surface of the outer spool (Fig. 28).

5.Check the indexing teeth on the inner reel and outer spool for wear (Fig. 29). If necessary, remove burrs or replace the reel and spool.

Fig. 28

Indexing Teeth

Fig. 29

MAINTENANCE AND REPAIR INSTRUCTIONS

For Use with Single	For Use with SplitLine™
Line ONLY	or Single Line
	Slotted
	Holes

Fig. 30

NOTE: SplitLine™ can only be used with the inner reel with the slotted holes. Single line can be used on either type of inner reel. Use Figure 30 to identify the inner reel you have.

NOTE: 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.

Loop

Fig. 31

Single Line Installation

Go To Step 8 for SplitLine™ Installation

6.Take approximately 40 feet (12.2 m) of new trimming line, loop it into two equal lengths. Insert each end of the line through one of the two holes in the inner reel (Fig. 31). Pull the line through the inner reel so that the loop is as small as possible.

7.Wind the lines in tight even layers, onto the reel (Fig. 32). Wind the line in the direction indicated on the inner reel. Place your index finger between the two lines to stop the lines from overlapping. Do not overlap the ends of the line. Proceed to step 11.

Fig. 32

SplitLine™ Installation

8.Take approximately 20 feet (6.1 m) of new trimming line. Insert one end of the line through one of the two holes in the inner reel (Fig. 33). Pull the line through the inner reel until only about 4 inches is left out.

9.Insert the end of the line into the open hole in the inner reel and pull the line tight to make the loop as small as possible (Fig. 33).

10.Before winding, split the line back about 6 inches.

11.Wind the line in tight even layers in the direction indicated on the inner reel.

NOTE: Failure to wind the line in the direction indicated will cause the cutting attachment to operate incorrectly.

Loop

Fig. 33

12.Insert the ends of the line into the two holding slots (Fig. 34).

13.Insert the ends of the line through the eyelets in the outer spool and place inner reel with spring inside the outer spool (Fig. 35). Push the inner reel and outer spool together. While holding the inner reel and outer spool, grasp the ends and pull firmly to release the line from the holding slots in the reel.

Holding Slots

Fig. 34

NOTE: The spring must be assembled on the inner reel before reassembling the cutting attachment.

14.Hold the inner reel in place and install the bump knob by turning counterclockwise. Tighten securely.

Spring

Fig. 35

MAINTENANCE AND REPAIR INSTRUCTIONS

INSTALLING A PREWOUND REEL

1.Hold the outer spool with one hand and unscrew the bump knob clockwise (Fig. 27). Inspect the bolt inside the bump knob to make sure it moves freely. Replace the bump knob if damaged.

2.Remove the old inner reel from the outer spool (Fig. 27).

3.Remove the spring from the old inner reel (Fig. 27).

4.Place the spring in the new inner reel.

NOTE: The spring must be assembled on the inner reel before reassembling the cutting attachment.

5.Insert the ends of the line through the eyelets in the outer spool (Fig. 35).

6.Place the new inner reel inside the outer spool. Push the inner reel and outer spool together. While holding the inner reel and outer spool, grasp the ends and pull firmly to release the line from the holding slots in the spool.

7.Hold the inner reel in place and install the bump knob by turning counterclockwise. Tighten securely.

Replacement Parts

See Accessories / Replacement Parts.

AIR FILTER MAINTENANCE

Removing the Air Filter/Muffler Cover

WARNING: To avoid serious personal injury, always turn your trimmer off and allow it to cool before you clean or service it.

1.Remove the four (4) screws securing the air filter/muffler cover (Fig. 36). Use a flat blade or T20 Torx bit screwdriver.

2.Pull the cover from the engine. Do not force.

EZ-Start™

Lever

Screws

Fig. 36

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 the air filter will VOID the warranty.

1.Remove air filter/muffler cover. Refer to Removing the Air Filter/Muffler Cover.

2.Turn cover over and look inside to locate the air filter. Remove the air filter from inside the air filter/muffler cover (Fig. 37).

3.Wash the filter in detergent and water (Fig. 38). Rinse the filter thoroughly. Squeeze out excess water. Allow it to dry completely.

4.Apply enough clean SAE 30 oil to lightly coat the filter (Fig. 39).

5.Squeeze the filter to spread and remove excess oil (Fig. 40).

Air Filter

Inside Muffler

Cover

Fig. 37				Fig. 38
Fig. 37				Fig. 38

Fig. 39				Fig. 40
Fig. 39				Fig. 40

6.Replace the air filter inside the air filter/muffler cover (Fig. 37).

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

MAINTENANCE AND REPAIR INSTRUCTIONS

Reinstalling the Air Filter/Muffler Cover

1.Place the air filter/muffler cover over the back of the carburetor and muffler. Align the screw holes.

2.Insert the four (4) screws into the holes in the air filter/muffler cover (Fig. 36) and tighten.

Do not over tighten.

SPARK ARRESTOR MAINTENANCE

1.Remove air filter/muffler cover. Refer to Removing the Air Filter/Muffler Cover.

2.Locate muffler front and the two (2) bolts securing it to the engine (Fig. 41). Remove the two (2) bolts using a flatblade screwdriver or 5/16-inch socket or nut driver. Pull muffler off of the engine.

3.Turn muffler over to the back side and locate the exhaust gasket. Remove the muffler gasket from the muffler (Fig. 41).

NOTE: If the exhaust gasket is torn or damaged, replace it with a new gasket before reassembling muffler.

4.Using a small flatblade screwdriver, carefully pry up the spark arrestor from the recessed hole (Fig. 42). Remove the spark arrestor from the muffler.

5.Clean the spark arrestor with a wire brush. Replace it if it is damaged or if it is impossible to clean thoroughly (Fig. 42).

6.Reinstall the spark arrestor by pressing it into the recessed hole on the muffler's back side. Make sure it fits tightly against the muffler and is not raised up.

7.Place the exhaust gasket against muffler's back side. Align the gasket bolt holes with the bolt holes in the muffler. While holding exhaust gasket in place, insert the bolts into the muffler's front side (Fig. 41).

8.Place the muffler (with the exhaust gasket in place and bolts inserted), against the engine, aligning the bolt holes. Tighten the bolts to secure the muffler to the engine.

If using a torque wrench, torque to:

80-90 in.•lb. (9-10.2 N•m)

WARNING: If the muffler is not tightened securely, it could fall off causing damage to the unit and possible serious personal injury

Bolts	Spark	Exhaust
	Arrestor	Gasket

Muffler - Front		- Back Side

Spark

Arrestor

Flatblade

Screwdriver

Spark Arrestor

Muffler - Back Side

Fig. 42

9. Reinstall the air filter/muffler cover.

MAINTENANCE AND REPAIR INSTRUCTIONS

CARBURETOR ADJUSTMENT

The idle speed of the engine is adjustable through the air filter/muffler cover (Fig. 43).

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

Check Fuel Mixture

Old and/or improperly mixed fuel is usually the reason for improper unit performance. Drain and refill the tank with fresh, properly-mixed fuel prior to making any adjustments. Refer to Oil and Fuel Information.

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 and change the air/fuel mixture. 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

If, after checking the fuel mixture 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.

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

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. 43). Turn the idle speed screw in, clockwise, 1/8 of a turn at a time (as needed) until the engine idles smoothly.

Idle Speed Screw

Fig. 43

NOTE: The cutting attachment should not rotate when the engine idles.

3.If the cutting attachment rotates when the engine idles, turn the idle speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.

Checking the fuel mixture, cleaning the air filter, and adjusting the idle speed should solve most engine problems. If not and:

•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.

REPLACING THE SPARK PLUG

Use a Champion RDJ7Y spark plug, or equivalent. The correct air gap is 0.020 inch (0.5 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 it from the spark plug.

2.Clean around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8-inch socket counterclockwise.

3.Replace a cracked, fouled or dirty spark plug. Set the air gap at 0.020 in. (0.5 mm) using a feeler gauge (Fig. 44).

CAUTION: 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. Tighten by turning the 5/8-inch 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.

0.020 in.

(0.5 mm)

Fig. 44

MAINTENANCE AND REPAIR INSTRUCTIONS

CLEANING

WARNING: To avoid serious personal injury, always turn your trimmer 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 a fueled unit where fumes may reach an open flame or spark.

•Allow the engine to cool before storing.

•Store the unit locked up 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

If you plan on storing the unit for an extended time, use the following storage procedure:

1.Drain all fuel from the fuel tank into a container with the same 2-cycle fuel mixture. Do not use fuel that has been stored for more than 60 days. Dispose of the old fuel/oil mix in accordance to Federal, State and Local regulations.

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 1 oz. (30 ml) of any high quality motor oil or 2-cycle 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.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. The unit is ready for storage.

TRANSPORTING

•Allow the engine to cool before transporting.

•Drain fuel from unit.

•Tighten fuel cap before transporting.

•Secure the unit while transporting.

ACCESSORIES/REPLACEMENT PARTS

2-Cycle Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147543

Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 610311

Exhaust Gasket . . . . . . . . . . . . . . . . . . . . . . .753-04159

Spark Arrestor . . . . . . . . . . . . . . . . . . . . . . . . . . .182747

Replacement Line . . . . . . . . . . . . . . . . . . . . . . . . 180120

Replacement Line Cartridge . . . . . . . . . . . . . . . . 147345

Inner Reel Spring . . . . . . . . . . . . . . . . . . . . . . . . 610636

Outer Spool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683301

Inner Reel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147495

Bump Knob . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180814

Fuel Cap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180000

Shoulder Strap . . . . . . . . . . . . . . . . . . . . . . . . . . 682075

EZ-Link™ Hanger . . . . . . . . . . . . . . . . . . . . . . . . .51562

These replacement parts can be purchased from your local authorized dealer.

	TROUBLESHOOTING


ENGINE WILL NOT START
C A U S E		A C T I O N
Empty fuel tank		Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough		Press primer bulb fully and slowly 10 times
Engine is flooded		Squeeze the trigger and pull the starter rope
Old or improperly mixed fuel		Drain gas tank and add fresh fuel mixture
Fouled spark plug		Replace or clean the spark plug
Plugged spark arrestor		Clean or replace spark arrestor

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 or improperly mixed fuel		Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment		Adjust according to the Carburetor Adjustments section

ENGINE WILL NOT ACCELERATE
C A U S E		A C T I O N
Old or improperly mixed fuel		Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment		Take to an authorized service dealer for an 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 or improperly mixed fuel		Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment		Take to an authorized service dealer for an 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.

	SPECIFICATIONS


ENGINE*
Engine Type...........................................................................................................................................	Air-Cooled, 2-Cycle
Stroke .....................................................................................................................................................	1.25 in. (31.75 mm)
Displacement..............................................................................................................................................	1.9 cu in. (31 cc)
Clutch Type .........................................................................................................................................................	Centrifugal
Idle Speed RPM .........................................................................................................................................	2,800-3,600 rpm
Operating RPM ..................................................................................................................................................	6,100+ rpm
Ignition Type..........................................................................................................................................................	Electronic
Ignition Switch ...........................................................................................................................	Momentary Rocker Switch
Spark Plug Gap ........................................................................................................................................	0.020 in. (0.5 mm)
Lubrication...................................................................................................................................................	Fuel/Oil Mixture
Fuel/Oil Ratio..................................................................................................................................................................	32:1
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 with Lock-Out
Unit Weight (No fuel, with cutting attachment, cutting attachment shield and J-handle)		...................... 14.75 lbs. (6.69 kg)
Cutting Mechanism .................................................................................	4-Tooth Cutting Blade, Dual String Cutting Head
Line Spool.............................................................................................................................................		Bump Line Releaser
Line Spool Diameter .............................................................................................................................		4 inches (101.6 mm)
Trimming Line Diameter ......................................................................................................................		0.095 inch (2.41 mm)
Cutting Path Diameter, Cutting Attachment .........................................................................................		18 inches (45.7 cm)
Cutting Path Diameter, Cutting Blade .....................................................................................................		8 inches (204 mm)
Shoulder Harness ...................................................................................................................................		Single Quick-Snap

*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.

NOTES

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