Cub Cadet CC4105 User Manual

Operator’s Manual

4-Cycle Gasoline Trimmers

CC4105

TABLE OF CONTENTS

Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . . . . . . .2 Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . . . . . . .4 Starting/Stopping Instructions . . . . . . . . . . . . . . . . . . . . . .6 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . .7 Maintenance and Repair Instructions . . . . . . . . . . . . . . . .8 Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Warranty Information . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

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.

SAVE THESE INSTRUCTIONS

For service call 1-877-282-8684 in the United States, or 1-800-668-1238 in Canada to obtain a list of authorized service dealers near you. For more details about your unit, visit our website at www.cubcadet.com.

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

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

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

SPARK ARRESTOR NOTE

NOTE: For users on U.S. Forest Land and in the states of California, Maine, Oregon and Washington. All U.S. Forest Land and the state of California (Public Resources Codes 4442 and 4443), Oregon and Washington require, by law that certain internal combustion engines operated on forest brush and/or grass-covered areas be equipped with a spark arrestor, maintained in effective working order, or the engine be constructed, equipped and maintained for the prevention of fire. Check with your state or local authorities for regulations pertaining to these requirements. Failure to follow these requirements could subject you to liability or a fine. This unit is factory equipped with a spark arrestor. If it requires replacement, ask your LOCAL SERVICE DEALER to install the

Accessory Part #753-05297 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.

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© 2007 MTD SOUTHWEST INC, All Rights Reserved.

P/N 769-02763

(1/07)

RULES FOR SAFE OPERATION

• 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 0.080 inch (2.03 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 approved for the storage of such materials.

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

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

•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 does not have a clutch. The cutting attachment continues rotating 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

2

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 standards and ear protection when operating this unit. Use a full face shield when needed.

•PRIMER BULB

Push primer bulb, fully and slowly, 10 times.

•UNLEADED FUEL

Always use clean, fresh unleaded fuel.

•OIL

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

ON / START / RUN

•ON/OFF STOP CONTROL

OFF or STOP

•KEEP BYSTANDERS AWAY

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

•HOT SURFACE WARNING

Do not touch a hot muffler, 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 the line cutting blade.

•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.

KNOW YOUR UNIT

APPLICATIONS

As a trimmer:

•Cutting grass and light weeds

•Edging

•Decorative trimming around trees, fences, etc.

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.

Shaft

Housing

Line

Cutting

Blade

	Spark Arrestor	Spark Plug
	Muffler
	Muffler Guard	Fuel
		Cap
	Starter Rope Grip

On/Off Stop Control	Shaft Grip
J-Handle

Primer

Bulb

Throttle

Control

Air Filter Cover

	Oil Fill Plug/
Cutting Attachment	Dipstick

3

ASSEMBLY INSTRUCTIONS

INSTALL CUTTING ATTACHMENT SHIELD

Use the following instructions if the cutting attachment shield on your unit is not installed. Use only the instructions that apply to the type of shaft and shield that your unit is equipped with.

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

CC4105

1.Place the cutting attachment shield onto the shaft housing. Be sure the guard mounting bracket slides into the slot on the edge of the cutting shield. Rotate the shield into place, counterclockwise. The holes in the guard mounting bracket and cutting attachment shield will line up (Fig. 1).

Shaft Housing

Guard

Mounting

Bracket

Cutting

Attachment

Shield

Fig. 1

2.From inside the cutting attachment shield, push the square bolt through the hole until the threaded end protrudes through the guard mounting bracket (Fig. 2).

Guard Mounting Bracket

Washer

Wing Nut

Square

Cutting Attachment Blot

Shield

Fig. 2

3.Put the washer on the bolt, then screw the wing nut onto the bolt and tighten. Figure 3 shows the installation process from underneath the unit.

Bolt

Fig. 3

INSTALL AND ADJUST THE D-HANDLE

On some units, the D-handle may be pre-installed, requiring only loosening screws and some adjustment. If this is the case, go to step 4.

1.Push the D-handle down onto the shaft housing (Fig. 4). The squared bolt hole in the handle is to the right.

Shaft Grip

Shaft Housing

D-Handle

	Tighten
Minimum 6 inches
(15.24 cm)	Wing Nut
Bolt	Washer

Fig. 4

2.Insert the shoulder bolt into the squared hole in the handle and push through. On the left side of the handle, place the washer on the bolt, then screw the wing nut onto the bolt. Do not tighten until you make the handle adjustment.

3.Rotate the D-handle to place the grip above the top of the shaft housing. Place it a minimum of 6 inches (15.24 cm) from the end of the shaft grip.

4.While holding the unit in the operating position (Fig. 13), position the D-handle to the location that provides you the best grip.

5.Tighten the wing nut until the D-handle is secure.

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 3.04 fluid oz. (90 ml.) bottle of SAE 30 SF, SG, SH oil (Fig. 5).

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. 5).

4

OIL AND FUEL INFORMATION

	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
Funnel Spout	• Drain tank and run the engine dry before storing unit
	Using Fuel Additives

		The use of fuel additives, such as STA-BIL® Gas Stabilizer or an
		equivalent, will inhibit corrosion and
		minimize the formation of gum deposits. Using a fuel additive
Fig. 5
		can keep fuel from forming harmful deposits in the carburetor

2.Place the unit on a flat level surface (Fig. 6).

Oil Fill

Fig. 6

3.Remove the oil plug / dipstick from the crankcase (Fig. 7).

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. 8).

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

O-Ring

Oil Fill Plug/Dipstick

Oil Fill Hole

Fig. 7

4.Pour the entire bottle of oil into the oil fill hole (Fig. 6). 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.

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

Gas Cap

		Unleaded
		Gasoline
Fuel Tank	Gas Can
	Fig. 8
2. Place the gas container’s spout into		the fuel

tank (Fig. 10) 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

4.Reinstall the fuel cap.

5. Move the unit at least 30 ft. (9.1 m)	source
and site before starting the engine.
NOTE: Dispose of the old gasoline in	Federal,
State and Local regulations.

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.

5

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

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. 9).

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever (Fig. 14) 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. 10). 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. 11). Pull the starter rope out a short distance, until you feel some resistance. This is usually around 2-4 inches. Then pull the starter rope out with a controlled and steady motion 5 times. The engine should start.

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather Start Lever (Fig. 12) back up to the run/open position after the unit has started and before squeezing the throttle control.

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 )

Fig. 9

Cold Weather

Start Lever

Fig. 10

Starter Rope

Throttle Control

Fig. 11

Throttle

Control

Primer

Bulb

Run/ Open

Cold

Weather

Start Lever

Close/ Start

Fig. 12

6

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. 13). 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

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. 14).

Fig. 14

Fig. 13

Some line breakage will occur from:

•Entanglement with foreign matter

•Normal line fatigue

•Attempting to cut thick, stalky weeds

•Forcing the line into objects such as walls or fence posts

TIPS FOR BEST TRIMMING RESULTS

•For best trimming results, operate unit at full throttle.

•Keep the cutting attachment parallel to the ground.

•Do not force the cutting attachment. Allow the tip of the line to do the cutting, especially along walls. Cutting with more than the tip will reduce cutting

efficiency and may overload the engine.

•Cut grass over 8 inches (200 mm) by working from top to bottom in small increments to avoid premature line wear or engine drag.

•Slowly move the trimmer into and out of the cutting area at the desired height. Move either in a forward-backward or side-to- side motion. Cutting shorter lengths produces the best results.

•Trim only when grass and weeds are dry.

•The life of your cutting line is dependent upon:

•Proper adherence of explained trimming techniques

•What vegetation is cut

•Where vegetation is cut

For example, the line will wear faster when trimming against a foundation wall as opposed to trimming around a tree.

7

MAINTENANCE AND REPAIR INSTRUCTIONS

MAINTENANCE SCHEDULE		NOTE:	Maintenance, replacement, or repair of the emission
Perform these required maintenance procedures at the			control devices and system may be performed by any
frequency stated in the table. These procedures should also be			non-road engine repair establishment, individual or
a part of any seasonal tune-up.			authorized service dealer.
NOTE: Some maintenance procedures may require special
				WARNING: To prevent serious injury, never
tools or skills. If you are unsure about these
				perform maintenance or repairs with unit running.
procedures take your unit to any non-road engine
				Always service and repair a cool unit. Disconnect
repair establishment, individual or authorized service
				the spark plug wire to ensure that the unit cannot
dealer.				start.
FREQUENCY	MAINTENANCE REQUIRED				REFER TO
Before starting engine	Fill fuel tank with fresh fuel				Page 5
	Check oil				Page 10
Every 10 hours	Clean and re-oil air filter				Page 11
First change at 10 hours	Change oil				Page 10
At 25 hours	Change oil				Page 10
Every 25 hours thereafter	Clean spark arrestor				Page 14
10 hours on new engine	Check rocker arm to valve clearance and adjust				Page 12
Every 25 hours	Check rocker arm to valve clearance and adjust				Page 12
Every 25 hours	Check spark plug condition and gap				Page 14

LINE INSTALLATION

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

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

Always use original equipment manufacturer replacement line. Use 0.080 in. (2.03 mm) line. Line other than the specified may make the engine overheat or fail.

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.Hold the outer spool with one hand and unscrew the Bump Knob counterclockwise (Fig. 15). Inspect the bolt inside the bump knob to make sure it moves freely. Replace the bump knob if damaged.

Outer Spool

Bolt

Spring

Bump

Knob™ Inner

Reel

Fig. 15

2.Remove the inner reel from outer spool (Fig. 15).

3.Remove spring from the inner reel (Fig. 15).

4.Use a clean cloth to clean the the inner reel, spring, shaft and inner surface of the outer spool (Fig. 16).

5.Check the indexing teeth on

the inner reel and outer spool for wear (Fig. 17). If necessary, remove burrs or replace the reel and spool.

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 18 to

identify the inner reel you Fig. 16 have.

Indexing Teeth

	Fig. 17
For Use with Single	For Use with SplitLine™
Line ONLY	or Single Line
	Slotted
	Holes

Fig. 18

8

MAINTENANCE AND REPAIR INSTRUCTIONS

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.

Single Line Installation

Go To Step 8 for SplitLine™ Installation

6.Take approximately 16 feet (5 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. 19). Pull the line through the inner reel so that the loop is as small as possible.

Loop

Fig. 19

7.Wind the lines in tight even layers, onto the reel (Fig. 20). 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. 20

SplitLine™ Installation

8.Take approximately 8 feet (2.5 m) of new trimming line. Insert one end of the line through one of the two holes in the inner reel (Fig. 21). Pull the line through the inner reel until only about 4 inches is left out.

Loop

Fig. 21

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. 21).

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.

12. Insert the ends of the line into the two holding slots (Fig. 22).

Holding Slots

Fig. 22

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. 23). 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.

Eyelet	Eyelet
	Spring

Fig. 23

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 clockwise. Tighten securely.

Installing a Prewound Wheel

1.Hold the outer spool with one hand and unscrew the bump knob counterclockwise. Inspect the bolt inside the bump knob to make sure it moves freely. Replace the bump knob if damaged (Fig. 15).

2.Remove the old inner reel from the outer spool (Fig. 15).

3.Remove the spring from the old inner reel (Fig. 15).

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. 23).

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 clockwise. Tighten securely.

9

MAINTENANCE AND REPAIR INSTRUCTIONS

CHECKING THE OIL LEVEL

WARNING: To prevent extensive engine wear and damage to the unit, always maintain the proper oil level in the crankcase. Never operate the unit with 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. 24).

Oil Fill Plug/Dipstick

O-Ring

Full

Add 1.4-1.5 Oz.

(41-44 ml)

Top of Dipstick

Fig. 24

6.If the level is low, add a small amount of oil to the oil fill hole and recheck (Fig. 25). Repeat this procedure until the oil level reaches the top of the dipstick.

NOTE: Do not overfill the unit.

NOTE: Make sure the O-ring is in place on the oil fill plug/dipstick when checking and changing the oil (Fig. 25).

O-Ring

Oil Fill Plug/Dipstick

Oil Fill Hole

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.

2.Remove the oil fill plug/dipstick.

CAUTION: Wear gloves to prevent injury when handling the unit.

3.Pour the oil out of the oil fill hole and into a container by tipping the unit to a vertical position (Fig. 26). Allow ample time for complete drainage.

Fig. 26

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 3.04 fluid ounce (90 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. 27). Check the level with the dipstick. If the level is low, add a small amount of oil and recheck. Do not overfill (Fig. 27).

Fill Level

Fig. 25

Fig. 27

6. Replace the oil fill plug/dipstick.

7. Reconnect the spark plug boot.

10

MAINTENANCE AND REPAIR INSTRUCTIONS

AIR FILTER MAINTENANCE

Cleaning the Air Filter

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

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.

1.Open the air filter cover. Push the tab on the left side of the cover inward. Then pull the air filter cover out and to the right (Fig. 28).

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

2.Remove the air filter (Fig. 28).

Air Filter	Air Filter Cover
Tab

5.Squeeze the filter to spread and remove excess oil (Fig. 31).

Fig. 31

6.Replace the filter (Fig. 32).

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

Back Plate

Slots

Fig. 28	Fig. 32

3.Wash the filter in detergent and water (Fig. 29). Rinse the filter thoroughly and allow it to dry.

7.Reinstall the air filter cover. Position the hooks on the right side of the air filter cover into the slots at the right side of the back plate (Fig. 33, no.1).

8.Swing the cover to the left until the tab on the air filter cover snaps into place in the slot on the back plate (Fig. 33, no. 2).

Air Filter Cover

	Fig. 29
	4. Apply enough clean SAE 30 motor oil to lightly coat the	Cover
	filter (Fig. 30).
		Hinge

Fig. 33

Fig. 30

11

MAINTENANCE AND REPAIR INSTRUCTIONS

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. 34).

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

Check Fuel

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.

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.

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.

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

Adjust Idle Speed Screw

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. 34). 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 engine idles.

Idle Ajustment

Screw

Fig. 34

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.

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 five (5) screws on back of the engine cover with a Flat-head or T-20 Torx screwdriver (Fig. 35).

Remove

Screws

Engine

Cover

Muffler

Fig. 35

2.Remove the screw behind the engine cover with a Flathead or T-25 Torx screwdriver (Fig. 36).

Screw

Fig. 36

12

MAINTENANCE AND REPAIR INSTRUCTIONS

3.Disconnect the spark plug wire.

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

5.Remove the engine cover (Fig. 35 & 36).

6.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. 37). Remove the rocker arm cover and gasket.

Rocker Arm Cover

Spark Plug Hole

Fig. 37

7.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. 37)

•Both rocker arms move freely, and both valves are closed If these statements are not true, repeat this step.

8.Slide the feeler gauge between the rocker arm and the valve return spring. Measure the clearance between the valve stem and rocker arm (Fig. 38). Measure both the intake and exhaust valves.

The recommended clearance for both intake and exhaust is

.003 – .006 in. (.076 – 0.152 mm). Use a standard automotive

.005 in. (0.127 mm) feeler gauge. The feeler gauge should slide between the rocker arm and valve stem with a slight amount of resistance, without binding. Figure 38 and 39 show how to measure the clearance.

Exhaust

Adjusting Nut

Exhaust

Rocker Arm

0.003–0.006 in. (0.076–0.152 mm)

Intake Valve	Feeler Gauge
Stem
	Exhaust Valve Stem
	Fig. 39

9.If the clearance is not within specification:

a.Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver (Fig. 39).

•To increase clearance, turn the adjusting nut counterclockwise.

•To decrease clearance, turn the adjusting nut clockwise.

b.Recheck both clearances, and adjust as necessary.

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

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

12.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. 33).

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

14.Replace the spark plug wire.

Adjusting Nuts

Rocker Arms

INTAKE

EXHAUST

Feeler Gauge

Fig. 38

13

MAINTENANCE AND REPAIR INSTRUCTIONS

REPLACING THE SPARK PLUG

Use a replacement part number 791-180852B 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.

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

3.Replace cracked, fouled or dirty spark plug. Set the air gap at 0.025 in. (0.635 mm.) using a feeler gauge (Fig. 40).

0.025 in.

(0.635 mm.)

Fig. 40

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 and a T-25 bit, remove the screws attaching the spark arrestor diverter to the muffler (Fig. 41).

Muffler

Spark Arrestor Screen

Diverter

T-25 Screw

Slot

T-20 Screw

Fig. 41

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.

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.

14

	TROUBLESHOOTING
	ENGINE WILL NOT START
	C A U S E			A C T I O N
	Empty fuel tank			Fill fuel tank with fuel
	Primer bulb wasn't pressed enough			Press primer bulb fully and slowly 10 times
	Old fuel			Drain gas tank and add fresh fuel
	Fouled spark plug			Replace or clean the spark plug
	Plugged spark arrestor			Clean or replace spark arrestor
	When it is above 40°F outside & the Cold Weather Start Lever			Flip the Cold Weather Start Lever to RUN / OPEN
	is in the CLOSED / START position
	When it is below 40°F outside & the Cold Weather Start Lever			Flip the Cold Weather Start Lever to CLOSED / START and
	is in the RUN / OPEN position			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 according to the Carburetor Adjustments section or take
				to an authorized service dealer for an adjustment
	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			Adjust according to the Carburetor Adjustments section or 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 fuel			Drain gas tank and add fresh fuel
	Improper carburetor adjustment			Adjust according to the Carburetor Adjustments section or 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.

15

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 .............................................................................................................................................................	3,400 - 4,400 rpm
Ignition Type.................................................................................................................................................................................	Electronic
Ignition Switch .......................................................................................................................................................................	Rocker Switch
Valve clearance.....................................................................................................................................	0.003–0.006 in. (0.076–0.152 mm)
Spark Plug Gap .......................................................................................................................................................	0.025 inch (0.635 mm)
Lubrication ..................................................................................................................................................................................	SAE 30 Oil
Crankcase Oil Capacity .......................................................................................................................................................	3.04 oz (90 ml)
Fuel ..............................................................................................................................................................................................	Unleaded
Carburetor..............................................................................................................................................................	Diaphragm, All-Position
Starter......................................................................................................................................................................................	Auto Rewind
Muffler ............................................................................................................................................................................	Baffled with Guard
Throttle......................................................................................................................................................................	Manual Spring Return
Fuel Tank Capacity...............................................................................................................................................................	18 oz (532 ml)
DRIVE SHAFT AND CUTTING ATTACHMENT*
Drive Shaft Housing ............................................................................................................................................	Steel Tube (Rapid-Link™)
Throttle Control ...............................................................................................................................................................	Finger-Tip Trigger
Approximate Unit Weight (No fuel, with handle, shield and cutting attachment)...................................................................	12 lbs (5.4 kg)
Cutting Mechanism ...............................................................................................................................................................	Bump Head™
Line Spool....................................................................................................................................................................	Bump Line Releaser
Line Spool Diameter: ....................................................................................................................................................	3 inches (76.2 mm)
Trimming Line Diameter: .......................................................................................................................................	0.080 inches (2.03 mm)
Cutting Path Diameter ..............................................................................................................................................	17 inches (431.8 mm)

*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.

16

NOTES

17