Murray 41AS79MY758 User Manual
Operator’s Manual
2-Cycle Handheld Blower
TABLE OF CONTENTS
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Oil and Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
SAVE THESE INSTRUCTIONS
SERVICE
DO NOT RETURN THIS UNIT TO THE RETAILER. PROOF OF
PURCHASE WILL BE REQUIRED FOR WARRANTY SERVICE.
For assistance regarding the assembly, operation or maintenance of
the unit, please call 1-800-800-7310 (in the United States) or 1-800-
668-1238 (in Canada). Additional information can be found at
www.mtdproducts.com (in the United States) or
www.mtdproducts.ca (in Canada).
Warranty service is available through an authorized service center.
To locate a service center in your area, please visit our website or
call the number listed above. Service on this unit, both within and
after the warranty period, should only be performed by an
authorized and approved service center. When servicing, use only
identical replacement parts.
All information, illustrations, and specifications in this manual are based
on the latest product information available at the time of printing. We
reserve the right to make changes at any time without notice.
The product may vary slightly from the illustrations contained in this
manual.
Copyright© 2015 MTD SOUTHWEST INC, All Rights Reserved.
IMPORTANT: Read this manual thoroughly before using this product. Follow all instructions.
769-10764 / 01 07/15
SAFETY
The purpose of safety symbols is to attract your attention to
possible dangers. The safety symbols, and their explanations,
deserve your careful attention and understanding. The safety
warnings do not by themselves eliminate any danger. The
instructions or warnings they give are not substitutes for proper
accident prevention measures.
SYMBOL MEANING
DANGER:
Failure to obey a safety DANGER symbol WILL result in
serious injury or death to yourself or to others.
WARNING:
Failure to obey a safety WARNING symbol CAN result in
serious injury to yourself or to others.
Signals an EXTREME hazard.
Signals a SERIOUS hazard.
CAUTION:Signals a MODERATE hazard.
Failure to obey a safety CAUTION symbol MAY result in
property damage or injury to yourself or to others.
NOTE: Advises you of information or instructions vital to the
operation or maintenance of the equipment.
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the states of
California, Maine, Oregon and Washington. All U.S. Forest Land
and the state of California (Public Resources Codes 4442 and
4443), Oregon and Washington require, by law that certain internal
combustion engines operated on forest brush and/or grass-covered
areas be equipped with a spark arrestor, maintained in effective
working order, or the engine be constructed, equipped and
maintained for the prevention of fire. Check with your state or local
authorities for regulations pertaining to these requirements. Failure
to follow these requirements could subject you to liability or a fine.
This unit is factory equipped with a spark arrestor. If it requires
replacement, contact your local service dealer to install the
appropriate muffler assembly.
CALIFORNIA PROPOSITION 65
WARNING:This product contains a chemical
known to the state of California to cause cancer, birth defects
or other reproductive harm.
Read the operator’s manual and follow all warnings and safety
instructions. Failure to do so can result in serious injury to the
operator and/or bystanders.
• IMPORTANT SAFETY INSTRUCTIONS •
READ ALL INSTRUCTIONS BEFORE OPERATING
WARNING:
instructions must be followed. Please read these
instructions before operating the unit in order to ensure the
safety of the operator and any bystanders. Please keep
these instructions for later use.
• Read the instructions carefully. Be familiar with the controls and
proper use of the unit.
• Do not operate this unit when tired, ill or under the influence of
alcohol, drugs or medication.
• Never allow children to operate the unit. Teens must be trained,
accompanied and supervised by an adult. Never allow adults to
operate the unit without proper instruction.
• All guards and safety attachments must be installed properly
before operating the unit.
• Inspect the unit before use. 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.
• 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.
When using the unit, all safety
• Clear the area of children, bystanders and pets; keep them
outside a 50-foot (15 m) radius, at a minimum. Even then, they are
still at risk from thrown objects. Encourage bystanders to wear
eye protection. If you are approached, stop the unit immediately.
• Squeeze the throttle control and check that it returns
automatically to the idle position. Make all adjustments or
repairs before using the unit.
• Do not change the engine governor settings or overspeed the
engine.
• This unit is intended for occasional, household use only.
2
SAFETY WARNINGS FOR GAS UNITS
WARNING:Gasoline is highly flammable and
its vapors can explode if ignited. Take the following
precautions:
• Store fuel only in containers specifically designed and approved
for the storage of such materials.
• Always stop the engine and allow it to cool before filling the
tank. Never remove the fuel tank cap or add fuel when the
engine is hot. Always loosen the fuel tank cap slowly to relieve
any pressure in the tank before fueling.
• Always 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.
WHILE OPERATING
• Wear safety glasses or goggles that meet current ANSI / ISEA
Z87.1 standards and are marked as such. Wear ear/hearing
protection when operating this unit. Wear a face mask or dust
mask if the operation is dusty.
• Wear heavy long pants, boots, gloves and a long sleeve shirt. Do
not wear loose clothing, jewelry, short pants, sandals or go
barefoot. Secure hair above shoulder level.
• 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 a firm grip when operating.
• Do not overreach. Always keep proper footing and balance. Take
extra care when working on stairs, steep slopes or inclines. To
avoid serious injury, do not operate the unit while on a ladder or
a roof.
• Keep hands, face, and feet away from all moving parts. Do not
touch or try to stop moving parts.
• Do not touch the engine 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.
• Before setting the unit down, always make sure the engine is off
and all moving parts have stopped.
• 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 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.
BLOWER SAFETY
• Do not insert anything into the air openings, blower tubes or
nozzle. Do not operate the unit if any of the air openings or
tubes are blocked. Keep the air openings free from dust, lint,
hair and anything else that may reduce airflow.
• Do not operate the unit without the blower tube securely attached.
• Do not use the unit to spray liquids, especially flammable or
combustible liquids, such as gasoline. Do not use the unit in
areas where such liquids are present.
• Do not use the unit for spreading chemicals, fertilizer or any
other substance that may contain toxic materials.
• Do not set the unit down on any surface while the unit is
running. Debris can be picked up by the air intake and thrown
out the discharge opening, resulting in damage to the unit or
property or causing serious injury to bystanders or the operator.
• During operation, never point the unit in the direction of people,
animals, windows or automobiles. Always direct blowing debris
away from people, animals, windows or automobiles.
• Use extra caution when blowing debris near solid objects, such
as trees, walls, fences, etc. When possible, blow away from
such objects, not toward them.
• Take care when working near valuable plants. The force of the
blown air could damage tender plants.
• Never attempt to clear a clogged air intake opening while the
unit is running.
• Keep hair, fingers and all other body parts away from moving
parts and openings.
3
OTHER SAFETY WARNINGS
• Maintain the unit with care.
• All service, other than the maintenance procedures described in
this manual, should be performed by an authorized service dealer.
• Never remove, modify or make inoperative any safety device
furnished with the unit.
• Before inspecting, 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 and clean (free from debris, oil and grease).
Clean the unit after each use. Refer to Cleaning and Storage. Do
not use solvents or strong detergents.
• Keep these instructions. Refer to them often and use them to
instruct other users. If you loan this unit to others, also loan
them these instructions.
SAVE THESE INSTRUCTIONS
4
• 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:
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:
noise can cause severe eye injury and hearing loss.
Wear eye protection meeting current ANSI / ISEA
Z87.1 standards and ear protection when operating
this unit. Use a full face shield when needed.
• 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:
containing greater than 10% ethanol will likely
damage this engine and void the warranty.
Read the operator’s
Thrown objects and loud
It has been proven that fuel
• ON/OFF STOP CONTROL
ON / START / RUN
• ON/OFF STOP CONTROL
OFF or STOP
• PRIMER BULB
Push primer bulb, fully and slowly, 10 times.
• CHOKE CONTROL
• START choke position
• WARM UP choke position
• RUN choke position
• THROWN OBJECTS CAN CAUSE SEVERE INJURY
WARNING:
propelled at high speed, causing injury.
• KEEP BYSTANDERS AWAY
Small objects can be
WARNING:Keep all bystanders,
especially children and pets, at least 50 feet (15 m) from
the operating area.
• HOT SURFACE
WARNING:
or cylinder. You may get burned. These parts get
extremely hot from operation. When turned off, they
remain hot for a short time.
Do not touch a hot muffler
• BLOWERS – ROTATING IMPELLER BLADES CAN
CAUSE SEVERE INJURY
WARNING:
impeller to stop before changing tubes, cleaning or
performing any maintenance. Keep hands and feet
away from moving parts.
Stop the unit and allow the
5
KNOW YOUR UNIT
APPLICATIONS
• Cleaning yards, garages, driveways, porches, patios, around
walls, fences and more
Spark Plug
NO ASSEMBLY TOOLS REQUIRED
Muffler
Upper Blower
Tube
Nozzle
On/Off Switch
Throttle
Handle
Control
Starter
Rope Grip
Primer Bulb
Choke Lever
Air Filter
Cover
Fuel Cap
SPECIFICATIONS*
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 oz. (414 ml)
Approximate Unit Weight (No fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 10 lbs. (4.1 - 4.5 kg)
Air Volume** (measured at: upper tube / nozzle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 / 250 cfm (11 / 7 m
Air Speed (Peak)** (measured at: upper tube / nozzle) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 / 180 mph (145 / 290 km/h)
Air Speed (Average)** (measured at: upper tube / nozzle). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 / 150 mph (120 / 240 km/h)
3
/min)
* 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.
** Measured per ANSI B175.2.
6
ASSEMBLY
WARNING:
To avoid serious personal injury and
damage to the unit, shut the unit off before removing or
installing blower tubes or nozzles.
WARNING:
To prevent serious personal injury, never
operate the unit without the upper blower tube firmly
installed.
ASSEMBLING THE UNIT
• Always install the upper blower tube.
• Only use the nozzle to concentrate and intensify the air flow
when needed. DO NOT use the nozzle for general work or for
long periods.
Installing the Upper Blower Tube
1. Set the unit on a flat, level surface.
2. Align the slot on the upper blower tube with the tab on the
blower outlet (Fig. 1).
3. Push the upper blower tube onto the blower outlet until the tab
locks securely into the slot (Fig. 1).
Installing the Nozzle
1. Set the unit on a flat, level surface.
2. Align the tab on the nozzle with the hole on the upper blower
tube (Fig. 2).
3. Push the nozzle into the upper blower tube until the tab locks
securely into the hole (Fig. 2).
Removing the Nozzle
1. Set the unit on a flat, level surface.
2. Firmly press the tab on the nozzle inward and pull the nozzle out
of the upper blower tube (Fig. 2).
Blower Outlet
Upper
Blower Tube
Tab
Slot
Fig. 1
Upper Blower Tube
Nozzle
Hole
Tab
Fig. 2
7
OIL AND FUEL
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
WARNING:
has been proven that fuel containing greater than 10%
ethanol will likely damage this engine and void the warranty.
Using Fuel Additives
The container of 2-cycle oil provided with this unit includes 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. (95 ml) container of 2-cycle
oil. To obtain the correct fuel mixture described below, pour the
entire container into one gallon of unleaded gasoline.
DO NOT USE E85 FUEL IN THIS UNIT. It
FUELING THE UNIT
WARNING:
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:
from fuel spray. Never operate the unit without the fuel cap
securely in place.
WARNING:
area. Wipe up any spilled fuel immediately. Avoid creating
a source of ignition for spilled fuel. Do not start the engine
until fuel vapors dissipate.
1. Position the unit with the fuel cap facing up.
2. Slowly remove the fuel cap.
3. Place the fuel container spout into the 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.
Gasoline is extremely flammable. Ignited
Remove the fuel cap slowly to avoid injury
Add fuel in a clean, well-ventilated outdoor
CAUTION:
reliability, pay strict attention to the gasoline and oil mixing
instructions on the 2-cycle oil container. Using improperly
mixed fuel can severely damage the engine.
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
For proper engine operation and maximum
1 gallon U.S.
(3.8 liters)
1 liter 25 ml
MIXING RATIO - 40:1
3.2 fl. oz.
(95 ml)
8
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. 5).
WARNING:
When starting the unit, make sure it is not
directed toward people, animals, windows, automobiles or
loose debris.
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. 3).
3. Slowly press and release the primer bulb 10 times (Fig. 4). If fuel
cannot be seen in the primer bulb, press and release the primer
bulb until fuel is visible.
4. Move the choke lever to the START position (Fig. 4).
5. Crouch in the starting position (Fig. 5).
NOTE: SQUEEZE and HOLD the throttle control for ALL further
steps (Fig. 3).
6. Squeeze and hold the throttle control (Fig. 3). Pull the starter
rope with a controlled and steady motion 5 times (Fig. 5).
7. Continue to squeeze the throttle control. Move the choke lever
to the WARM UP position (Fig. 4).
8. Continue to squeeze the throttle control. Pull the starter rope
with a controlled and steady motion 3 to 5 times to start the
engine.
9. Continue to squeeze the throttle control. Allow the engine to
warm up for 30 to 60 seconds.
10. Continue to squeeze the throttle control. Move the choke lever
to the RUN position (Fig. 4). Allow the engine to warm up for an
additional 60 seconds. The unit may be used during this time.
NOTE: The engine is properly warmed up when it accelerates
without hesitation.
IF... the engine hesitates, return the choke lever to the WARM UP
position and repeat steps 9 - 10.
IF... the engine does not start, begin the starting procedure with
step 3.
IF... the engine fails to start after a few attempts: Move the choke
lever to the RUN position. Squeeze and hold the throttle control.
Pull the starter rope with a controlled and steady motion 3 to 8
times. The engine should start. If it does not, repeat this
instruction.
IF... the engine is already warm, begin the starting procedure with
step 7.
On/Off Switch
Throttle Control
Choke Lever
Starter Rope Grip
Off (O)
Fig. 3
Fig. 4
Fig. 5
On ( I )
Primer Bulb
Starting
Position
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. 3).
9
OPERATION
WARNING:
operate the unit without the upper blower tube firmly
installed.
WARNING:
protection to reduce the risk of injury when operating this unit.
Wear a face mask or dust mask if the operation is dusty.
To prevent serious personal injury, never
Always wear eye, hearing, hand, foot and body
HOLDING THE UNIT
• Stand in the operating position (Fig. 6). Stand up straight. Do not
bend over.
• Keep feet apart and firmly planted.
• Hold the unit with a firm grip.
• Hold the unit in front of, and away from, your body (Fig. 6).
WARNING:
to the unit, DO NOT hold the unit at your side (Fig. 6). The
engine may be extremely hot. DO NOT block the air intake.
To prevent serious personal injury or damage
TIPS FOR BEST RESULTS
• Conserve water by using the blower instead of a hose to
perform many outdoor cleaning actions.
• Operate the unit only at reasonable hours, not early in the morning
or late at night when people might be disturbed. Comply with
times listed in local ordinances. Usual recommendations are 9:00
a.m. to 5:00 p.m., Monday through Saturday.
• To reduce noise levels, operate the unit at the lowest speed
needed to do the job. Limit the number of pieces of power
equipment used at any one time.
• Use rakes or brooms to loosen debris before operation.
• In dusty conditions, slightly dampen surfaces.
• Watch out for children, pets, open windows and freshly washed
cars. Blow debris safely away. Never direct the unit toward
anyone while the unit is in operation.
• Sweep the unit from side to side with the blower tube several
inches above the ground. Slowly advance, keeping the
accumulated debris in front of the operator.
• Only use the nozzle to concentrate and intensify the air flow
when needed. DO NOT use the nozzle for general work or for
long periods.
• Clean up after operation. Dispose of debris appropriately.
Handle
Air Intake
Fig. 6
10
MAINTENANCE
WARNING:
the engine and allow it to cool before cleaning or maintaining
the unit. Never perform cleaning or maintenance while the
unit is running. Disconnect the spark plug wire to prevent
the unit from starting accidentally.
WARNING:
safety instructions to prevent serious personal injury.
To avoid serious personal injury, always stop
Wear protective clothing and observe all
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 left (Fig. 7).
2. Remove the air filter (Fig. 7).
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 (Fig. 7).
NOTE: Operating the unit without the air filter and air filter cover will
VOID the warranty.
7. Close the air filter cover: insert the tabs on the air filter cover into
the slots on the backplate. Swing the air filter cover to the right
and press it closed until the lock tab snaps into place (Fig. 7).
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.
FREQUENCY MAINTENANCE REQUIRED
Every 10 hours • Clean and re-oil the air filter. Refer to
Every 25 hours • Check the spark plug condition and gap.
Air Filter
Cover
Tabs
Lock Tab
Maintaining the Air Filter.
Refer to Maintaining the Spark Plug.
Slots
Fig. 7
Backplate
Air Filter
11
ADJUSTING THE IDLE SPEED
If the engine will not idle properly:
1. Drain the fuel tank and add fresh, properly-mixed fuel. Refer to
Oil and Fuel.
2. Clean the air filter. Refer to Maintaining the Air Filter.
If the engine still will not idle properly, adjust the idle speed:
1. Start the engine. Refer to Starting and Stopping.
2. Release the throttle control and let the engine idle. If the engine
stops, increase the idle speed. Use a small Phillips screwdriver
to turn the idle speed screw clockwise, 1/8 of a turn at a time,
until the engine idles smoothly (Fig. 8).
If the engine still will not idle properly, and any of the following
conditions are true, take the unit to an authorized service dealer:
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
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.
Idle Speed Screw
Fig. 8
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
3. Inspect the spark plug. If the spark plug is cracked, fouled or
dirty, replace it with 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. 9).
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.
0.025 in.
(0.635 mm)
Fig. 9
12
CLEANING AND STORAGE
CLEANING
WARNING:
the engine and allow it to cool before cleaning or maintaining
the unit.
Use a small brush to clean the outside of the unit. Do not use strong
detergents. Household cleaners that contain aromatic oils such as
pine and lemon, and solvents such as kerosene, can damage
plastic. Wipe off any moisture with a soft cloth.
To avoid serious personal injury, always stop
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.
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. Tip the unit and drain all of the oil from
the cylinder into an approved container. Reinstall the spark plug.
NOTE: Do not use fuel that has been stored for more than 30 days.
Dispose of old fuel and oil according to federal, state and local
regulations.
13
TROUBLESHOOTING
PROBLEM SOLUTION
THE ENGINE WILL NOT START
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
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
THE ENGINE WILL NOT IDLE
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 ENGINE WILL NOT ACCELERATE
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 ENGINE LACKS POWER OR STALLS
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
Move the choke lever to the RUN position, squeeze the throttle
control and pull the starter rope until the engine starts
If further assistance is required, contact an authorized service dealer.
14
NOTES
15
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