Murray MS2560 Operator's Manual
769-08353 / 00 08/12
Operator’s Manual
2-Cycle Trimmer
TABLE OF CONTENTS
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Oil and Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
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© 2012 MTD SOUTHWEST INC, All Rights Reserved.
DO NOT RETURN THIS UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
For assistance regarding the assembly, controls, operation or
maintenance of the unit, please call the Customer Support Department
at 1-800-800-7310 in the United States or 1-800-668-1238 in Canada.
Additional information about the unit can be found on our website:
www.mtdproducts.com (U.S.) or www.mtdproducts.ca (Canada).
For service, please call the Customer Support Department to obtain
a list of authorized service dealers near you. Service on this unit,
both within and after the warranty period, should only be performed
by an authorized and approved service dealer. When servicing, use
only identical replacement parts.
SAVE THESE INSTRUCTIONS
SERVICE
SAFETY
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 #753-06418 Muffler Assembly.
Read the operator’s manual and follow all warnings and safety
instructions. Failure to do so can result in serious injury to the
operator and/or bystanders.
SYMBOL MEANING
WARNING:
Signals a SERIOUS hazard.
Failure to obey a safety WARNING signal CAN result in
serious injury to yourself or to others.
CAUTION:
Signals a MODERATE hazard.
Failure to obey a safety CAUTION signal MAY result in
property damage or injury to yourself or to others.
The purpose of safety symbols is to attract your attention to
possible dangers. The safety symbols, and their explanations,
deserve your careful attention and understanding. The safety
warnings do not by themselves eliminate any danger. The
instructions or warnings they give are not substitutes for proper
accident prevention measures.
NOTE: Advises you of information or instructions vital to the
operation or maintenance of the equipment.
DANGER:
Signals an EXTREME hazard.
Failure to obey a safety DANGER signal WILL result in
serious injury or death to yourself or to others.
CALIFORNIA PROPOSITION 65
WARNING:
Engine exhaust, some of its constituents and
certain finished components contain or emit chemicals known
to the State of California to cause cancer and birth defects or
other reproductive harm. Wash hands after handling.
2
READ ALL INSTRUCTIONS BEFORE OPERATING
• Read the instructions carefully. Be familiar with the controls and
proper use of the unit.
• Do not operate this unit when tired, ill or under the influence of
alcohol, drugs or medication.
• Children must not operate the unit. Teens must be accompanied
and 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.
• Only use the trimming line described in the Specifications section
of this manual. Never use metal-reinforced line, wire, chain or
rope. These can break off and become dangerous projectiles.
• Be aware of risk of injury to the head, hands and feet.
• Carefully inspect the area before starting the unit. Remove
rocks, broken glass, nails, wire, string and other objects that
may be thrown or become entangled with the unit.
• Clear the area of children, bystanders and pets; keep them
outside a 50-foot (15 m) radius, at a minimum. Even then, they are
still at risk from thrown objects. Encourage bystanders to wear
eye protection. If you are approached, stop the unit immediately.
• Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments or
repairs before using the unit.
WHILE OPERATING
• Wear safety glasses or goggles that meet current ANSI Z87.1
standards and are marked as such. Wear ear/hearing protection
when operating this unit. Wear a face mask or dust mask if the
operation is dusty.
• Wear heavy long pants, boots, gloves and a long sleeve shirt. Do
not wear loose clothing, jewelry, short pants, sandals or go
barefoot. Secure hair above shoulder level.
• The cutting head shield must always be in place while operating
the unit. Do not operate the unit without both trimming lines
extended and the proper line installed. Do not extend the
trimming line beyond the length of the shield.
• This unit has a clutch. The cutting head remains stationary when
the engine is idling. If it does not, take the unit to an authorized
service dealer for an adjustment.
• Adjust the handle to provide the best grip.
• Make sure the cutting head 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 and Stopping.
• Use the right tool. Only use this tool for its intended purpose.
• Always hold the unit with both hands when operating. Keep a
firm grip on both handles or grips.
• Do not overreach. Always keep proper footing and balance. Take
extra care when working on steep slopes or inclines.
• Keep hands, face, and feet away from all moving parts. Do not
touch or try to stop moving parts.
• Do not touch the engine, gear housing or muffler. These parts get
extremely hot from operation, even after the unit is turned off.
• Do not operate the unit faster than the speed needed to do the job.
Do not run the unit at high speed when not in use.
• Do not force the unit. It will do a better, safer job when used at
the intended rate.
• Always stop the unit when operation is delayed or when walking
from one location to another.
• If you strike or become entangled with a foreign object, stop the
unit immediately and check for damage. Do not operate the unit
before repairing damage. Do not operate the unit with loose or
damaged parts.
• Turn the engine to off and disconnect the spark plug for
maintenance or repair.
• Use only original equipment manufacturer (OEM) replacement
parts and accessories for this unit. These are available from your
authorized service dealer. Use of any other parts or accessories
could lead to serious injury to the user, or damage to the unit,
and void the warranty.
• Keep the unit clean. Carefully remove vegetation and other
debris that could block moving parts.
• To reduce fire hazard, replace a faulty muffler and spark arrestor.
Keep the engine and muffler free from grass, leaves, excessive
grease or carbon build up.
• If the unit starts to vibrate abnormally, stop the unit immediately.
Inspect the unit for the cause of the vibration. Vibration is
generally an indicator of trouble.
SAFETY WARNINGS FOR GAS UNITS
• Store fuel only in containers specifically designed and approved
for the storage of such materials.
• Always stop the engine and allow it to cool before filling the
tank. Never remove the fuel tank cap or add fuel when the
engine is hot. Always loosen the fuel tank cap slowly to relieve
any pressure in the tank before fueling.
• Always mix and add fuel in a clean, well-ventilated outdoor area
where there are no sparks or flames. DO NOT smoke.
• Never operate the unit without the fuel cap securely in place.
• Avoid creating a source of ignition for spilled fuel. Wipe up any
spilled fuel from the unit immediately, before starting the unit.
Move the unit at least 30 ft. (9.1 m) from the fueling source and
site before starting the engine. DO NOT smoke.
• Never start or run the unit inside a closed room or building.
Breathing exhaust fumes can kill. Operate this unit only in a well
ventilated outdoor area.
• IMPORTANT SAFETY INSTRUCTIONS •
WARNING:
When using the unit, all safety rules must be
followed. Please read these instructions before operating
the unit in order to ensure the safety of the operator and any
bystanders. Please keep these instructions for later use.
WARNING:
Gasoline is highly flammable and its vapors
can explode if ignited. Take the following precautions:
3
• SAFETY & INTERNATIONAL SYMBOLS •
This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's
manual for complete safety, assembly, operating and maintenance and repair information.
SYMBOL MEANING SYMBOL MEANING
• SAFETY ALERT SYMBOL
Indicates danger, warning or caution. May be used in
conjunction with other symbols or pictographs.
• READ OPERATOR'S MANUAL
WARNING: Read the operator’s manual(s) and
follow all warnings and safety instructions. Failure to
do so can result in serious injury to the operator
and/or bystanders.
• WEAR EYE AND HEARING PROTECTION
WARNING: Thrown objects and loud noise can
cause severe eye injury and hearing loss. Wear eye
protection meeting current ANSI Z87.1 standards and
ear protection when operating this unit. Use a full face
shield when needed.
• UNLEADED FUEL
Always use clean, fresh unleaded fuel.
• OIL
Refer to operator’s manual for the proper type of oil.
• DO NOT USE E85 FUEL IN THIS UNIT
WARNING: It has been proven that fuel containing
greater than 10% ethanol will likely damage this
engine and void the warranty.
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF or STOP
• PRIMER BULB
Push primer bulb, fully and slowly, 10 times.
• THROWN OBJECTS AND ROTATING CUTTER CAN
CAUSE SEVERE INJURY
WARNING: Small objects can be propelled at high
speed, causing injury. Keep away from the rotating rotor.
• KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders, especially children
and pets, at least 50 feet (15 m) from the operating area.
• HOT SURFACE
WARNING: Do not touch a hot muffler or cylinder.
You may get burned. These parts get extremely hot
from operation. When turned off they remain hot for a
short time.
• SHARP BLADE
WARNING: Sharp blade on trimmer attachment
shield. To prevent serious injury, do not touch the line
cutting blade.
4
OTHER SAFETY WARNINGS
• All service, other than the maintenance procedures described in
this manual, should be performed by a qualified service dealer.
• Before inspecting, servicing, cleaning, storing, transporting or
replacing any parts on the unit:
1. Stop the unit.
2. Make sure all moving parts have stopped.
3. Allow the unit to cool.
4. Disconnect the spark plug wire.
• Secure the unit while transporting.
• Never store the unit with fuel in the tank, inside a building where
fumes may reach an open flame (pilot lights, etc.) or sparks
(switches, electrical motors, etc.).
• Store the unit in a dry place, secured or at a height to prevent
unauthorized use or damage. Keep the unit out of the reach of
children.
• Never douse or squirt the unit with water or any other liquid.
Keep handles dry, clean and free from debris. Clean the unit
after each use. Refer to Cleaning and Storage.
• Keep these instructions. Refer to them often and use them to
instruct other users. If you loan this unit to others, also loan
them these instructions.
SAVE THESE INSTRUCTIONS
Cutting Head
Shield
Fuel Cap
Handle
Cutting Head
Shaft Grip
Shaft Housing
Starter
Rope Grip
Throttle
Control
Spark Plug
Muffler
On/Off Switch
Line Cutting Blade
Air Filter
Cover
Coupler
Primer Bulb
Choke Lever
5
KNOW YOUR UNIT
APPLICATIONS
As a trimmer:
• Cutting grass and light weeds.
• Edging
• Decorative trimming around trees, fences, etc.
Other optional accessories may be used with this unit.
SPECIFICATIONS*
* All specifications are based on the latest product information available at the time of printing. We reserve the right to make changes at any
time without notice.
Engine Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
Displacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 cc (1.52 cu. in.)
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in. (0.635 mm)
Spark Plug . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion® RDJ7J or equivalent plug
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuel/Oil Mixture
Fuel/Oil Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 oz. (296 ml)
Approximate Unit Weight (No fuel, with cutting head, cutting head shield and handle) . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 11 lbs. (4.5 - 5 kg)
Trimmer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fixed-line cutting head
Trimming Line. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.095 inches (2.41 mm) pre-cut line
Cutting Path Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 in. (35.56 cm)
ASSEMBLY TOOLS REQUIRED:
• #2 Phillips screwdriver
• 3/8” Socket
ASSEMBLY
6
INSTALLING AND ADJUSTING THE HANDLE
Installing the Handle
1. Push the handle down onto the shaft housing (Fig. 2). The bolt
hole in the handle should be to the right.
2. Insert the bolt into the bolt hole and push it through (Fig. 2).
Tighten the bolt with a 3/ 8” socket, but do not tighten the bolt
completely .
3. While holding the unit in the operating position (Fig. 10), move
the handle to the location that provides the best grip. Place it a
minimum of 6 inches (15.24 cm) from the end of the shaft grip
(Fig. 2).
4. Tighten the bolt with a 3/ 8” socket until the handle is secure.
Adjusting the Handle
If the handle requires adjustment:
1. Loosen the bolt with a 3/ 8” socket (Fig. 2).
2. While holding the unit in the operating position (Fig. 10), move
the handle to the location that provides the best grip. Place it a
minimum of 6 inches (15.24 cm) from the end of the shaft grip
(Fig. 2).
3. Tighten the bolt with a 3/ 8” socket until the handle is secure.
INSTALLING THE CUTTING HEAD SHIELD
Use the following instructions if the cutting head shield is not
installed. Use only the instructions that apply to the type of shaft
and shield equipped with this unit.
1. Place the cutting head shield onto the mount bracket. Align the
holes in the cutting head shield with the holes in the mount
bracket. (Fig. 1)
2. Screw the 2 screws through the mount bracket and into the
cutting head shield until finger tight.
3. Using a #2 Phillips screwdriver, tighten the screws until the
cutting head shield is firmly in place. Tighten the screws equally.
The gap between the mount bracket and the cutting head shield
should be the same on each side.
Fig. 1
Mount Bracket
Cutting Head
Shield
Screws (2)
WARNING:
To prevent serious personal injury, never
operate the unit without the cutting head shield in place.
Fig. 2
Bolt
Shaft Grip
Minimum 6 in.
(15.24 cm)
Handle
Shaft
Housing
7
Fig. 4
Fig. 5
Fig. 3
Release Button
Guide Recess
90˚ Edging Hole
(Trimmer Only)
Knob
Primary Hole
Lower Shaft
Housing
Upper Shaft
Housing
OPERATING THE COUPLER
The coupler enables the use of various optional attachments.
NOTE: To make installing or removing the attachment easier, place
the unit on the ground or on a work bench.
Installing the Attachment
NOTE: Remove the protective cap and gray spacer from the upper
and lower shafts prior to assembling the attachment.
1. Turn the knob counterclockwise to loosen (Fig. 3).
2. While firmly holding the attachment, push it straight into the
coupler until the release button snaps firmly into the primary
hole (Fig. 5).
NOTE: Aligning the release button with the guide recess will help
installation (Fig. 4).
3. Turn the knob clockwise to tighten (Fig. 3).
For decorative edging with a string trimmer attachment, lock the
release button into the 90° edging hole (Fig. 3).
Removing the Attachment
1. Turn the knob counterclockwise to loosen (Fig. 3).
2. Press and hold the release button (Fig. 4).
3. While firmly holding the upper shaft housing, pull the attachment
straight out of the coupler (Fig. 5).
WARNING:
Before using any attachment, read and
understand the manual that came with the attachment.
Follow all safety information contained within.
CAUTION:
Before operating the unit, make sure the
release button is fully snapped into the primary hole (Fig. 5)
and the knob (Fig. 3) is securely tightened.
WARNING:
To avoid serious personal injury and
damage to the unit, shut the unit off before removing or
installing an attachment.
CAUTION:
The release button should be snapped into
the primary hole only. Using the wrong hole could lead to
personal injury or damage to the unit.
Coupler
8
OIL AND FUEL
FUELING THE UNIT
1. Position the unit with the fuel cap facing up.
2. Remove the fuel cap.
3. Place the fuel container spout into the fill hole on the fuel tank
and fill the tank.
NOTE: Do not overfill the tank.
4. Wipe up any fuel that may have spilled.
5. Reinstall the fuel cap.
6. Move the unit at least 30 ft. (9.1 m) from the fuel container and
the fueling site before starting the engine.
OIL AND FUEL MIXING INSTRUCTIONS
The use of old and/or improperly mixed fuel is the most common cause
of performance problems. Use only fresh, clean unleaded gasoline.
Follow the instructions carefully for the proper gasoline/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, forming acids when stored. ALWAYS use fresh fuel (less
than 30 days old).
NOTE: Dispose of old fuel according to federal, state and local
regulations.
Using Blended Fuels
If using a blended fuel:
• Always use the fresh fuel mix explained in your operator's manual
• Use the fuel additive STA-BIL® or an equivalent
• 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 provided with this unit contains a fuel
additive to help inhibit corrosion and minimize gum deposits.
Always use the brand of 2-cycle oil that came with this unit. If this is
unavailable, use a 2-cycle oil designed for air-cooled engines and
mix it with a fuel additive, such as STA-BIL Fuel 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.
Mixing the Fuel
NOTE: This unit comes with a 3.2 oz. bottle of 2-cycle oil. To obtain
the correct fuel mixture described below, pour the entire bottle
into one gallon of unleaded gasoline.
Thoroughly mix the proper ratio of unleaded gasoline with 2-cycle
engine oil. Do not mix them directly in the unit’s fuel tank. Use a
separate fuel can. Use a 40:1 gasoline/oil ratio. See the table below
for specific gasoline and oil mixing ratios.
Unleaded gasoline 2-cycle oil
1 gallon U.S.
(3.8 liters)
3.2 fl. oz.
(95 ml)
1 liter 25 ml
MIXING RATIO - 40:1
CAUTION:
For proper engine operation and maximum
reliability, pay strict attention to the gasoline and oil mixing
instructions on the 2-cycle oil bottle. Using improperly
mixed fuel can severely damage the engine.
WARNING:
Gasoline is extremely flammable. Ignited
vapors may explode. Always stop the engine and allow it
to cool before filling the fuel tank. Do not smoke while
filling the tank. Keep sparks and open flames at a distance
from the area.
WARNING:
Remove the fuel cap slowly to avoid injury
from fuel spray. Never operate the unit without the fuel cap
securely in place.
WARNING:
Add fuel in a clean, well ventilated outdoor
area. Wipe up any spilled fuel immediately. Avoid creating
a source of ignition for spilled fuel. Do not start the engine
until fuel vapors dissipate.
WARNING:
DO NOT USE E85 FUEL IN THIS UNIT. It
has been proven that fuel containing greater than 10%
ethanol will likely damage this engine and void the warranty.
9
STARTING AND STOPPING
WARNING:
Operate this unit only in a well-ventilated
outdoor area. Carbon monoxide exhaust fumes can be
lethal in a confined area.
WARNING:
Avoid accidentally starting the unit. To avoid
serious injury, the operator and the unit must be in a stable
position when pulling the starter rope (Fig. 9).
STARTING INSTRUCTIONS
1. Mix gasoline with oil. Refer to Oil and Fuel Mixing Instructions.
2. Fill the fuel tank. Refer to Fueling the Unit.
NOTE: There is no need to turn the unit on. The On/Off switch is in
the ON ( I ) position at all times (Fig. 6).
3. Slowly press and release the primer bulb 10 times (Fig. 7). If fuel
cannot be seen in the primer bulb, press and release the primer
bulb until fuel is visible.
4. Flip the choke lever clockwise until it clicks (Fig. 8).
5. Crouch in the starting position (Fig. 9).
6. DO NOT squeeze the throttle control (Fig. 6). Pull the starter
rope with a controlled and steady motion until the unit starts
(Fig. 9).
7. Idle the engine for 5 to 10 seconds. If the unit stops during this
time, squeeze the throttle control and pull the starter rope in a
controlled and steady motion until the unit starts.
8. Squeeze and hold the throttle control. Allow the engine to warm
up for 30 to 60 seconds.
NOTE: The engine is properly warmed up when it accelerates
without hesitation.
IF... the engine does not start, begin the starting procedure with
step 3.
IF... the unit is hot and fails to start within 3 pulls of the starter rope,
squeeze the throttle control and pull the starter rope with a
controlled and steady motion until the unit starts.
STOPPING INSTRUCTIONS
1. Release the throttle control and allow the engine to idle.
2. Press and hold the On/Off switch in the OFF (O) position until
the engine comes to a complete stop (Fig. 6).
Fig. 6
On ( I ) / Start
Off (O) / Stop
Throttle Control
Fig. 9
Starting
Position
Starter Rope Grip
Fig. 7
Primer Bulb
Fig. 8
Choke Lever
10
OPERATION
HOLDING THE UNIT
• Stand in the operating position (Fig. 10).
• Hold the shaft grip with the right hand. Keep the right arm
slightly bent.
• Hold the handle with the left hand. Keep the left arm straight.
• Hold the unit at waist level.
• Keep the cutting head parallel to the ground so that it easily
contacts the grass without the need for bending over.
WARNING:
Always wear eye, hearing, hand, foot and
body protection to reduce the risk of injury when operating
this unit.
TIPS FOR BEST RESULTS
• Keep the cutting head parallel to the ground.
• Cut from left to right whenever possible. This improves the unit's
cutting efficiency and throws clippings away from the operator.
• Do not trim wet grass or weeds.
NOTE: Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick vegetation
• Forcing the line into objects such as walls or fence posts
DECORATIVE TRIMMING
When trimming around trees, posts, fences, etc., rotate the whole
unit so that the cutting head is at a 30° angle to the ground (Fig. 11).
Fig. 10
Fig. 11
11
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency
stated in the table. These procedures should also be a part of any
seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or
skills. If you are unsure about these procedures, take the unit to
an MTD authorized service dealer.
NOTE: Maintenance, replacement, or repair of the emission control
devices and system may be performed by an MTD authorized
service dealer.
NOTE: Please read the California/EPA statement that came with the
unit for a complete listing of terms and coverage for the emissions
control devices, such as the spark arrestor, muffler, carburetor, etc.
WARNING:
To prevent serious injury, never perform
maintenance or repairs while the unit is running. Always
allow the unit to cool before servicing or repairing the unit.
Disconnect the spark plug wire to prevent the unit from
starting accidentally.
MAINTENANCE
FREQUENCY MAINTENANCE REQUIRED
Every 10 hours • Clean and re-oil the air filter. Refer to
Maintaining the Air Filter.
Every 25 hours • Check the spark plug condition and gap.
Refer to Maintaining the Spark Plug.
Fig. 12
Fig. 13
Fig. 14
Line
Holes
Cutting Head
Positioning
Tunnel
Positioning
Tunnel
Line
Line
Fig. 15
Line
Line
Cutting Head
REPLACING THE TRIMMING LINE
Only use the trimming line described in the Specifications section.
Other types of trimming line may cause the engine to overheat or fail.
1. Remove the old line from the cutting head.
2. Use a clean cloth to clean the surface of the cutting head.
3. Insert the ends of the line through the circular holes in the side
of the cutting head (Fig. 12). Push the line through the holes until
both ends protrude from the positioning tunnels (Fig. 13).
4. Pull the ends of the line until the line is tight against the cutting
head. Make sure the ends of the line are of equal length (Fig. 14).
If one end is longer than the other, push the longer end back
through the cutting head partway and pull the shorter end out. If
necessary, repeat this process until both ends are of equal length.
5. Press the exposed trimming line between the circular holes until
it lies flat against the cutting head (Fig. 15).
WARNING:
Never use metal-reinforced line, wire, chain or
rope. These can break off and become dangerous projectiles.
12
MAINTAINING THE AIR FILTER
Failure to maintain the air filter can result in poor performance or can
cause permanent damage to the engine. Engine failure due to
improper air filter maintenance is not covered by the product warranty.
Cleaning the Air Filter
1. Open the air filter cover: press in the lock tab and swing the air
filter cover to the right (Fig. 16).
2. Remove the air filter from inside the air filter cover (Fig. 16).
3. Wash the air filter in detergent and water. Rinse the air filter
thoroughly and allow it to dry.
4. Lightly coat the air filter with clean SAE 30 oil.
5. Squeeze the air filter to spread and remove excess oil.
6. Reinstall the air filter inside the air filter cover (Fig. 16).
NOTE: Operating the unit without the air filter and air filter cover will
VOID the warranty.
7. Close the air filter cover: swing the air filter cover to the left and
press it closed until the lock tab snaps into place (Fig. 16).
WARNING:
To avoid serious personal injury, always stop
the engine and allow it to cool before cleaning or maintaining
the unit.
Fig. 16
Air Filter
Air Filter Cover
Lock Tab
ADJUSTING THE IDLE SPEED
NOTE: Careless adjustments can seriously damage the unit. A qualified
service dealer should make carburetor adjustments.
If, after checking the fuel and cleaning the air filter, the engine still
will not idle, adjust the idle speed screw as follows:
1. Start the engine. Refer to Starting and Stopping.
2. Release the throttle control and let the engine idle. If the engine
stops, use a small Phillips screwdriver to turn the idle speed screw
clockwise, 1/8 of a turn at a time (as needed) until the engine idles
smoothly (Fig. 17).
3. If the engine is idling too quickly, turn the idle speed screw
counterclockwise, 1/8 of a turn at a time (as needed) to reduce the
idle speed (Fig. 17).
Checking the fuel, cleaning the air filter, and adjusting the idle speed
should solve most engine problems. If not, and any of the following
conditions are true, take the unit to a qualified service dealer:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
WARNING:
The cutting head may spin during idle speed
adjustments. Wear protective clothing and observe all
safety instructions to prevent serious personal injury.
Fig. 17
Idle Speed Screw
13
Fig. 18
0.025 in.
(0.635 mm)
MAINTAINING THE SPARK PLUG
1. Stop the engine and allow it to cool. Grasp the spark plug boot
firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the
cylinder head with a 5/8-inch socket, turning counterclockwise.
3. Inspect the spark plug. If the spark plug is cracked, fouled or
dirty, replace it with a replacement part #753-06193, a
Champion RDJ7J or an equivalent spark plug.
4. Use a feeler gauge to set the air gap at 0.025 in. (0.635 mm)
(Fig. 18).
5. Install the spark plug in the cylinder head. Tighten the spark plug
with a 5/8-inch socket, turning it clockwise until snug.
NOTE: If using a torque wrench, torque to:
110-120 in.•lb. (12.3-13.5 N•m). Do not over tighten.
6. Reattach the spark plug boot.
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
14
CLEANING AND STORAGE
CLEANING
Use a small brush to clean the outside of the unit. Do not use strong
detergents. Household cleaners that contain aromatic oils such as
pine and lemon, and solvents such as kerosene, can damage
plastic. Wipe off any moisture with a soft cloth.
STORAGE
• Never store a fueled unit where fumes may reach an open flame
or spark.
• Allow the engine to cool before storing.
• Lock up the unit to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
Short-term Storage (1-2 weeks)
1. Store the unit in a horizontal position. If this is not possible, store
the unit vertically with the engine at the top.
Long-term Storage
1. Remove the fuel cap, tip the unit and drain the fuel into an
approved container. Reinstall the fuel cap.
2. Start the engine and allow it to run until it stalls. This ensures
that all fuel has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 5
drops of any high quality motor oil or 2-cycle oil into the cylinder.
Pull the starter rope slowly to distribute the oil. Reinstall the
spark plug.
4. Thoroughly clean the unit and inspect it for any loose or
damaged parts. Repair or replace damaged parts and tighten
loose screws, nuts or bolts.
Preparing the Unit for Use after Long-term Storage
1. Remove the spark plug and drain all of the oil from the cylinder.
NOTE: Do not use fuel that has been stored for more than 30 days.
Dispose of old fuel according to federal, state and local regulations.
WARNING:
To avoid serious personal injury, always stop
the engine and allow it to cool before cleaning or maintaining
the unit.
15
If further assistance is required, contact an authorized service dealer.
The fuel tank is empty Fill the fuel tank with properly mixed fuel
The primer bulb was not pressed enough Press the primer bulb 10 times or until fuel is visible
The engine is flooded
Squeeze the throttle control and pull the starter rope until the engine
starts
The fuel is old (over 30 days) and/or improperly mixed Drain the fuel tank and add fresh, properly mixed fuel
The spark plug is fouled Replace the spark plug
TROUBLESHOOTING
The fuel is old (over 30 days) and/or improperly mixed Drain the fuel tank and add fresh, properly mixed fuel
The cutting head is bound with grass Stop the engine and clean the cutting head
The air filter is dirty Clean or replace the air filter
PROBLEM SOLUTION
The air filter is dirty Clean or replace the air filter
The fuel is old (over 30 days) and/or improperly mixed Drain the fuel tank and add fresh, properly mixed fuel
The idle speed is incorrect Adjust the idle speed
The fuel is old (over 30 days) and/or improperly mixed Drain the fuel tank and add fresh, properly mixed fuel
The air filter is dirty Clean or replace the air filter
The spark plug is fouled Replace the spark plug
THE ENGINE WILL NOT START
THE ENGINE WILL NOT IDLE
THE ENGINE WILL NOT ACCELERATE
THE ENGINE LACKS POWER OR STALLS
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