Yard Machines 21A-121R900 Manuel utilisateur

Catégorie
Outils de jardin
Taper
Manuel utilisateur

Ce manuel convient également à

2-Cycle Garden
Cultivator
Operator’s Manual
P/N 769-02636 (8/06)
SAVE THESE INSTRUCTIONS DO NOT THROW AWAY
2
INTRODUCTION
Copy the serial number
here:
THANK YOU
Thank you for buying this quality product. This modern
outdoor power tool will provide many hours of useful
service. You will find it to be a great labor-saving device.
This operator’s manual provides you with easy-to-
understand operating instructions. Read the whole
manual and follow all the instructions to keep your new
outdoor power tool in top operating condition.
PRODUCT REFERENCES, ILLUSTRATIONS
AND SPECIFICATIONS
All information, illustrations, and specifications in this
manual are based on the latest product information
available at the time of printing. We reserve the right to
make changes at any time without notice.
Copyright © 2005 MTD SOUTHWEST INC, All Rights
Reserved.
SERVICE INFORMATION
Service on this unit both within and after the warranty
period should be performed only by an authorized and
approved service dealer.
For service call 1-800-345-8746 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.yardmachines.com.
DO NOT RETURN THE UNIT TO THE RETAILER.
PROOF OF PURCHASE WILL BE REQUIRED FOR
WARRANTY SERVICE.
Before beginning, locate the unit’s model plate. It lists
the model and serial numbers of your unit. Refer to the
sample plate below and copy the information for future
reference.
S/N :
ITEM :
MODEL :
Make sure you carefully read and understand this manual
before starting or operating this equipment.
THIS PRODUCT IS COVERED BY ONE OR MORE U.S.
PATENTS. OTHER PATENTS PENDING.
TABLE OF CONTENTS
Service Information . . . . . . . . . . . . . . . . . . . . . . . . .2
Rules for Safe Operation . . . . . . . . . . . . . . . . . . . . .3
Know Your Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Assembly Instructions . . . . . . . . . . . . . . . . . . . . . . .7
Oil and Fuel Information . . . . . . . . . . . . . . . . . . . . . .8
Starting/Stopping Instructions . . . . . . . . . . . . . . . . .9
Operating Instructions . . . . . . . . . . . . . . . . . . . . . .10
Maintenance and Repair Instructions . . . . . . . . . . .11
Cleaning and Storage . . . . . . . . . . . . . . . . . . . . . . .14
Accessories and Replacement Parts . . . . . . . . . . .14
Troubleshooting Chart . . . . . . . . . . . . . . . . . . . . . .15
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Warranty Information . . . . . . . . . . . . . . . . . . . . . . .20
Parts List . . . . . . . . . . . . . . . . . . . .Inside Back Cover
Copy the model and parent
part number here:
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
#753-04925.
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.
3
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 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.
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.
Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
SYMBOL MEANING
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.
SYMBOL MEANING
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.
WARNING:
• IMPORTANT SAFETY INSTRUCTIONS •
Failure to obey a
safety warning can
result in injury to yourself and others.
Always follow the safety precautions to
reduce the risk of fire, electric shock and
personal injury.
WARNING:
Failure to obey a
safety warning will
result in serious injury to yourself or to
others. Always follow the safety precautions
to reduce the risk of fire, electric shock and
personal injury.
DANGER:
Failure to obey a
safety warning may
result in property damage or personal injury
to yourself or to others. Always follow the
safety precautions to reduce the risk of fire,
electric shock and personal injury.
CAUTION:
Indicates
danger,
warning or caution. Attention is required in
order to avoid serious personal injury. May
be used in conjunction with other symbols
or pictographs.
SAFETY ALERT:
Gasoline is highly
flammable, and its
vapors can explode if ignited. Take the
following precautions:
WARNING:
Read the Operator’s Manual(s) and follow all
warnings and safety instructions.
Failure to do so can result in serious injury to the
operator and/or bystanders.
FOR QUESTIONS, CALL 1-800-345-8746 in the
United States, or 1-800-668-1238 in Canada
RULES FOR SAFE OPERATION
4
RULES FOR SAFE OPERATION
Do not touch the engine or muffler. These parts get
extremely hot from operation. They remain hot for a
short time after you turn off the unit.
Do not operate the engine faster than the speed
needed to cultivate. Do not run the engine at high
speed when you are not cultivating.
Always stop the engine when cultivating is delayed or
when walking from one 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 and switch the engine to off for maintenance,
repair, or to install or remove the tines.
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 tines.
To reduce fire hazard, replace 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 the unit, with fuel in the tank, 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 the 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
Always stop the engine and allow it to cool before filling
the fuel tank. Never remove the cap of the fuel tank, 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.
Mix and add fuel in a clean, well-ventilated outdoor area
where there are no sparks or flames. Slowly remove the
fuel cap only after stopping engine. Do not smoke while
fueling or mixing fuel. Wipe up any spilled fuel from the
unit immediately. Always wipe unit dry before using.
Move the unit at least 30 feet (9.1 m) from the fueling
source and site before starting the engine. Do not
smoke or allow sparks and open flames near 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 kill. Operate
this unit only in a well ventilated outdoor area.
Wear safety glasses or goggles that are marked as
meeting ANSI Z87.1-1989 standards. Also wear
ear/hearing protection when operating this unit. Wear
a face or dust mask if the operation is dusty. Long
sleeve shirts are recommended.
Wear heavy, long pants, boots and gloves. Do not
wear loose clothing, jewelry, short pants, sandals or
go barefoot. Secure hair above shoulder level.
This unit has a clutch. The tines remains stationary
when the engine is idling. If it does not, have the unit
adjusted by an authorized service technician.
Be sure the tines are not in contact with anything
before starting the unit.
Use the unit only in daylight or good artificial light.
Avoid accidental starting. The operator and unit must
be in a stable position while starting. See
Starting/Stopping Instructions.
Use the right tool. Only use this tool for the purpose
intended.
Use extreme caution when reversing or pulling the unit
towards you.
Do not overreach. Always keep proper footing and
balance. Take extra care when working on steep
slopes or inclines.
Always hold the unit with both hands when operating.
Keep a firm grip on the grips.
Keep hands, face, and feet at a distance from all
moving parts. Do not touch or try to stop the tines
when they are rotating.
5
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
SAFETY ALERT SYMBOL
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.
KEEP BYSTANDERS AWAY
WARNING: Keep all bystanders,
especially children and pets, at least
50 feet (15 m) from the operating area.
UNLEADED FUEL
Always use clean, fresh unleaded fuel.
OIL
Refer to operator's manual for the
proper type of oil.
• THROWN OBJECTS AND
ROTATING CUTTER CAN CAUSE
SEVERE INJURY
WARNING: Do not operate without
the proper attachments and guards in
place. Keep away from the rotating
tines.
SYMBOL MEANING
ON/OFF STOP CONTROL
ON / START / RUN
ON/OFF STOP CONTROL
OFF or STOP
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.
• CHOKE CONTROL
1 • FULL choke position.
2 • PARTIAL choke position.
3 • RUN position.
GARDEN CULTIVATORS –
ROTATING TINES CAN CAUSE
SEVERE INJURY
WARNING: Stop the engine and allow
the tines to stop before installing or
removing tines, or before cleaning or
performing any maintenance. Keep
hands and feet away from rotating
tines.
NO STEP
Always keep proper footing and
balance. Do not overreach, take extra
care when working on steep slopes or
inclines.
PLACE LEFT FOOT HERE
Avoid accidental starting. Stand in the
starting position whenever pulling the
starter rope. The operator and unit
must be in a stable position while
starting.
12
3
6
RULES FOR SAFE OPERATION
KNOW YOUR UNIT
Tine Guard
Tines
Gearbox
Primer Bulb
Air Filter/
Muffler
Cover
Spark
Plug
Muffler
Fuel Cap
Throttle
Control
Starter Rope Grip
Handlebar
Wheel Bracket
Assembly
Shaft Tube Grip
Handgrip
Handgrip
On/Off Stop
Control
STOP/OFF (O)
START/ON (I)
Throttle
Cable and
Switch Wires
Handlebar
Knob
Handlebar
Knob
Application
Cultivating sod and light to medium soil
Cultivating in garden areas, around trees, etc.
Blue Choke
Lever
7
ASSEMBLY INSTRUCTIONS
ASSEMBLING THE UNIT
Before operating, position the unit’s handlebars.
NOTE: You may also need to reposition the wheel height
before using the cultivator. Refer to the Adjusting
Tine Depth section.
Begin by carefully unpacking the contents and making
sure that nothing is damaged.
POSITIONING THE HANDLEBARS
1. Loosen the two knobs on the inside of the
handlebars (Fig. 1).
2. With the unit upright, swing the handlebars up into
the operating position (Fig. 1).
NOTE: Take care not to pinch the throttle cable or
switch wires when positioning the handlebar.
3. Tighten the knobs to secure the handlebars in place.
NOTE: Do not over-tighten the knobs.
4. Readjust the throttle cable and switch the wires so
they are smooth and tight against the handlebar
assembly. This will help prevent them from catching
or snagging during normal operation.
INSTALLING THE WHEEL BRACKET
ASSEMBLY
If the wheel bracket assembly is not installed, or if you
ever need to remove or reinstall it, follow the ensuing
instructions.
1. With the unit on its side, place the wheel bracket
assembly on the underside of the tine guard (Fig. 3).
2. Install a carriage bolt through each of the slotted
holes in the wheel bracket and into the tine guard.
3. On the TOP side of the tine guard, install a lock
washer and a wing nut onto each of the bolts (Fig. 3).
4. Make sure the square shoulder of the bolts is pushed
through the slotted holes in the wheel bracket.
Tighten the wing nuts (Fig. 4).
NOTE: Do not over-tighten the wing nuts. Loosen the
wing nuts to adjust wheel height.
Wing Nut &
Lock Washer
Tine
Guard
Wheel
Bracket
Assembly
Fig. 4
Fig. 3
To avoid injury from
the tines, wear
heavy gloves and a long sleeve shirt when
installing the wheel bracket assembly.
WARNING:
To prevent serious
personal injury, the
wheel bracket assembly must be installed
when operating the unit.
WARNING:
Handlebar
Knobs
Handlebar
Knobs
Handlebar
Knob
Handlebars
Washer
Hole
Bolt
Fig. 2
Fig. 1
8
OIL AND FUEL INFORMATION
FILLING THE FUEL TANK
Make sure the cultivator is in a horizontal position when
filling or adding fuel to the tank.
Fig. 5
NOTE: Dispose of the old fuel/oil mix in accordance to
Federal, State and Local regulations.
OIL AND FUEL MIXING INSTRUCTIONS
Old and/or improperly mixed fuel are the main reasons
for the unit not running properly. Be sure to use fresh,
clean unleaded fuel. Follow the instructions carefully for
the proper fuel/oil mixture.
Definition of Blended Fuels
Today's fuels are often a blend of gasoline and
oxygenates such as ethanol, methanol, or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1%
water in the fuel can make fuel and oil separate. It forms
acids when stored. When using alcohol-blended fuel,
use fresh fuel (less than 60 days old).
Using Blended Fuels
If you choose to use a blended fuel, or its use is
unavoidable, follow recommended precautions:
Always use the fresh fuel mix explained in your
operator's manual
Always agitate the fuel mix before fueling the unit
Drain the tank and run the engine dry before storing
the unit
Using Fuel Additives
The bottle of 2-cycle oil that came with your unit
contains a fuel additive which will help inhibit corrosion
and minimize the formation of gum deposits. It is
recommended that you use our 2-cycle oil with this unit.
If unavailable, use a good 2-cycle oil designed for
air-cooled engines along with a fuel additive, such as
STA-BIL
®
Gas Stabilizer or an equivalent. Add 0.8 oz.
(23 ml.) of fuel additive per gallon of fuel according to the
instructions on the container. NEVER add fuel additives
directly to the unit's fuel tank.
Thoroughly mix the proper ratio of 2-cycle engine oil
with unleaded gasoline in a separate fuel can. Use a 40:1
fuel/oil ratio. Do not mix them directly in the engine fuel
tank. See the table below for specific gas and oil mixing
ratios.
NOTE: One gallon (3.8 liters) of unleaded gasoline mixed
with one 3.2 oz. (95 ml.) bottle of
2-cycle oil makes a 40:1 fuel/oil ratio.
UNLEADED GAS 2 CYCLE OIL
1 GALLON US
(3.8 LITERS)
3.2 FL. OZ.
(95 ml)
1 LITER 25 ml
+
MIXING RATIO - 40:1
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.
WARNING:
Gasoline is
extremely
flammable. Ignited Vapors may explode.
Always stop the engine and allow it to cool
before filling the fuel tank. Do not smoke
while filling the tank. Keep sparks and open
flames at a distance from the area.
WARNING:
Remove fuel cap
slowly to avoid injury
from fuel spray. Never operate the unit
without the fuel cap securely in place
.
WARNING:
For proper engine
operation and
maximum reliability, pay strict attention to
the oil and fuel mixing instructions on the
2-cycle oil container. Using improperly mixed
fuel can severely damage the engine.
CAUTION:
9
STARTING/STOPPING INSTRUCTIONS
Blue Choke Lever
Position 1
Starter
Rope
Throttle
Control
Primer Bulb
STARTING INSTRUCTIONS
1. Mix gas with oil. Fill fuel tank with fuel/oil mixture. Refer
to Oil and Fuel Mixing Instructions.
2. Make sure the On/Off Stop Control in the ON [
I
]
position (Fig. 6).
3. Place the blue choke lever in Position 1 (Fig. 7).
4. 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. 7). 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.
5. Stand between the handlebars and support the unit by
placing your left foot on the wheel bracket assembly
and gripping the handlebar grip with your right hand
(Fig. 8).
NOTE: Tilt the unit back slightly to bring the tines off
the ground when starting.
6. While squeezing the throttle control to the wide open
(full throttle) position, grasp the starter rope grip with
your left hand. Pull the starter rope out a short
distance, until you feel some resistance. This is usually
around 2-4 inches. Then pull the rope smoothly and
briskly. Repeat this 5 times.
7. Move the blue choke lever to Position 2.
8. While squeezing the throttle control, pull the starter
rope in the same manner as explained in Step 6. Pull 1
to 3 times to start the engine.
9. Keep the throttle squeezed and allow the engine to
warm up for 15 to 30 seconds.
NOTE: Engine may take longer to warm up and reach
maximum operating speed at colder temperatures.
NOTE: Unit is properly warmed up when engine
accelerates without hesitation.
10. Once the engine is warmed up, place the blue choke
lever in Position 3 (Fig. 7). Release the throttle control
to the idle position and begin operation.
IF...
The engine hesitates, return choke lever to Position 2
(Fig. 7) and continue warm up.
IF... The engine does not start, go back to step 3.
IF...
The engine fails to start after a few attempts, place
the blue choke lever in Position 3 and squeeze the
throttle control. Pull the starter rope briskly 3 to 8
times. The engine should start. If not, repeat.
IF WARM...
If the engine is already warm, make sure the
On/Off Stop control is in the ON position and start the
unit with the blue choke lever in Position 2. After the
unit starts, move the blue choke lever to Position 3.
Position 3
Position 2
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 STOP (O)
position.
On/Off Stop Control
ON (I)
OFF (O)
Throttle Control
Fig. 6
Fig. 8
Fig. 7
Operate this unit only
in a well- ventilated
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. 8).
To avoid serious injury,
the operator and unit must be in a stable
position while starting.
WARNING:
10
OPERATING INSTRUCTIONS
TRANSPORTING THE UNIT
1. Stop the engine.
2. Slide the wheel bracket assembly all the way down.
3. Tilt the unit back until the tines clear the ground.
4. Push or pull the unit to the next location.
OPERATING TIPS
1. Move the cultivator to the work area prior to starting the
engine. Transport the cultivator by pushing it on its
wheels.
2. Start the unit as described in the Starting Instructions.
3. With the engine running and the tines off the ground,
depress the throttle control to increase the engine speed.
4. Holding both of the handlebar grips firmly, slowly
lower the cultivator until the tines make contact with
the ground (Fig. 9).
5. As cultivating action begins, pull back on the
cultivator so that the tines can penetrate the ground.
6. Once the ground has been broken, continue at a
moderate pace until you are familiar with the controls
and the handling of the cultivator.
7. Pull the cultivator backwards to improve the depth of
cultivation and reduce your effort.
8. If the tines are digging too deep or not deep enough,
adjust them according to Adjusting Tine Depth.
ADJUSTING TINE DEPTH
Tine adjustment will vary depending on the type of soil
being cultivated and how it will be used. Generally,
adjusting the tines to break the soil 4 to 6 inches is
recommended for most gardens. Adjust the tines as
follows:
1. Stop the engine and disconnect the spark plug wire.
2. Loosen (do not remove) the two wing nuts on the
tine guard (Fig. 10).
3. Slide the wheel bracket assembly down for shallower
penetration, and up for deeper tine penetration.
4. Once the tines are in the desired position, tighten the
wing nuts, making sure that the carriage bolts are
seated properly through the bracket.
5. If the tine depth is incorrect, repeat steps 2 to 4.
6. Reconnect the spark plug wire and continue use.
Down
Up
Fig. 10
Fig. 9
To prevent serious
personal injury, use
extreme caution when reversing
or pulling the unit towards you.
WARNING:
To prevent serious
personal injury,
never pick-up or carry the unit while the
engine is running.
WARNING:
To prevent serious
personal injury,
always stop the engine when operation is
delayed or when transporting the unit from
one location to another
WARNING:
Dress properly to
reduce the risk of
injury when operating this unit. Do not
wear loose clothing or jewelry. Wear eye
and ear/hearing protection. Wear heavy
long pants, boots and gloves. Do not wear
short pants, sandals or operate barefoot.
WARNING:
11
MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 12
Clevis Pin Clip
Felt
Washer
Shaft
Felt
Washer
Tine
Hubs
Stagger Tips
R
R
L
L
Clevis Pin
TINE REMOVAL AND REPLACEMENT
Replace all four (4) tines at the same time, because they
will wear evenly through normal use. Work on one side
at a time.
1. Put the On/Off Stop Control in the STOP (O) position
and disconnect the spark plug wire.
2. Remove the clevis pin clips and clevis pins (Fig. 11).
3. Remove the tines and felt washers from the shaft.
4. Clean and oil the shaft.
5. The tines are stamped with the letter "R" or "L" to
identified their position on each side of the gearbox
when facing the front of the unit.
6. Replace the tines and felt washers onto the shaft
with the hubs on the tines facing each other.
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the
frequency stated in the table. These procedures should
also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure
about these procedures take your unit to
any non-road engine repair establishment,
individual or authorized service dealer.
NOTE:
Maintenance, replacement, or repair of the emission
control devices and system may be performed by
any non-road engine repair establishment, individual
or authorized service dealer.
In order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. If you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. If you feel your engine is in need of this
inspection, refer service to any non-road engine repair
establishment, individual or authorized service dealer for
repair. DO NOT attempt to perform this process yourself
as engine damage may result from contaminants
involved in the cleaning process for the port.
FREQUENCY MAINTENANCE REQUIRED REFER TO
Before starting engine Fill fuel tank with fresh fuel mix Page 8
Every 10 hours Clean and re-oil air filter Page 12
Every 25 hours
Check and clean spark arrestor
Check spark plug condition and gap
Page 12
Page 13
Every 50 hours
Inspect exhaust port and spark arrestor screen for clogging or
obstruction to assure maximum performance levels
Page 12
7. Before you reinstall the clevis pins and pin clips,
ensure that the tips on the tines are staggered when
compared to each other (Fig. 12).
8. Repeat this procedure on the opposite side.
NOTE: When installed correctly, there will be an "R" and
"L" tine on both the sides of the gearbox and the
tips of the tines. These letters will line up in the
same direction for each side. It is important that
the tines are installed correctly.
Fig. 11
To prevent serious
injury, never perform
maintenance or repairs with unit running.
Always service and repair a cool unit.
Disconnect the spark plug wire to ensure that
the unit cannot start.
WARNING:
To prevent serious
personal injury,
always wear heavy gloves when handling
the tines.
WARNING:
12
MAINTENANCE AND REPAIR INSTRUCTIONS
Cleaning the Air Filter
Clean and re-oil the air filter every 10 hours of operation.
It is an important item to maintain. Failure to maintain
your air filter properly can result in poor performance or
can cause permanent damage to your engine.
1. Remove the air filter/muffler cover. Refer to the
Removing the Air filter/Muffler Cover section.
2. Remove the air filter from inside the air filter/muffler
cover (Fig. 14).
3. Wash the filter in detergent and water (Fig. 14). Rinse
the filter thoroughly. Squeeze out excess water.
Allow it to dry completely.
4. Apply enough SAE 30 oil to lightly coat the filter (Fig. 15).
5. Squeeze the filter to spread and remove extra oil (Fig. 15).
6. Replace the air filter inside the muffler cover (Fig. 14).
NOTE:
Operating the unit without the air filter and cover
assembly will VOID the warranty
.
Reinstalling the Air filter/Muffler Cover
1. Place the air filter/muffler cover over the back of the
carburetor and muffler.
NOTE: The blue choke lever must be in Postion 2 (Fig.
13) to remove the air filter/ muffler cover.
2. Insert the four (4) screws into the holes in the air filter/
muffler cover (Fig. 13) and tighten. Use a # T20 Torx
bit screwdriver. Do not over tighten. Do not force.
Blue Choke
Lever
Screws
Screws
Position 2
AIR FILTER MAINTENANCE
Removing the Air Filter/Muffler Cover
1. Place the blue choke lever in Position 2.
NOTE: The blue choke lever must be in Position 2
(Fig. 13) to remove the air filter/ muffler cover.
2. Remove the four (4) screws securing the air
filter/muffler cover (Fig. 13). Use a # T20 Torx bit
screwdriver.
3. Pull the cover from the engine. Do not force.
Air Filter
Inside Muffler
Cover
Fig. 13
Fig. 14
Fig. 15
To avoid serious
personal injury,
always turn the unit off and allow it to cool
before you clean or service it.
WARNING:
SPARK ARRESTOR MAINTENANCE
1. Remove air filter/muffler cover. Refer to Removing
the Air Filter/Muffler Cover.
2. Locate the muffler, but do not remove it. Find the
screw on the bottom of the muffler (Fig. 16). Remove
the screw using either a torx #20 or flat blade
screwdriver.
3. Carefully pry up the left side spark arrestor hood.
Two tabs act as hinges on the right side of the hood.
Flip open the spark arrestor hood like a door and
then pull its tabs out of the muffler slots.
4. Using a small flat blade screwdriver, carefully pry the
spark arrestor screen out from the inside of the spark
arrestor hood.
5. Clean the spark arrestor screen with a wire brush.
Replace it if it is damaged, or if you are unable to
clean it thoroughly.
6. Reinstall the spark arrestor screen snugly back into
the spark arrestor hood.
7. Reinstall the two hood tabs into the two muffler slots
and flip the spark arrestor hood closed.
8. Replace the screw you removed in Step 2 and tighten
it securely.
9. Reinstall the air filter/muffler cover.
13
MAINTENANCE AND REPAIR INSTRUCTIONS
REPLACING THE SPARK PLUG
Use a Champion RDJ7Y spark plug (or equivalent). The
correct air gap is 0.020 in. (0.5 mm). Remove the plug
after every 25 hours of operation to 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.
NOTE: Replace a cracked, fouled or dirty spark plug.
3. Set the air gap at 0.020 in. (0.5 mm) using a feeler
gauge (Fig. 18).
Adjust Idle Speed Adjuster
If after checking the fuel mixture and cleaning the air
filter the engine still will not idle, adjust the idle speed
screw as follows:
1. Start the engine and let it run for about 2-3 minutes
at a high speed (full throttle) to warm up. Refer to the
Starting/Stopping Instructions.
NOTE: Ensure the tines are not in contact with the
ground when adjusting the idle.
2. Release the throttle control and let the engine idle. If
the engine stops, insert a small phillips screwdriver
into the hole in the muffler cover (Fig. 17). Turn the
idle speed screw clockwise 1/8 of a turn at a time
(as needed) until the engine idles smoothly.
NOTE:
The tines should not rotate during engine idle.
3. If the tines rotate when the engine idles, turn the idle
speed screw counterclockwise 1/8 of a turn at a
time (as needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter, and
adjusting the idle speed screw should solve most engine
problems. If not and all 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.
Idle Speed Adjuster
CARBURETOR ADJUSTMENTS
The engine’s idle speed adjuster is adjustable through
the air filter/muffler cover (Fig 17).
NOTE:
Careless adjustment
s can seriously damage your
unit. An authorized service dealer should make
carburetor adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the tank
with fresh, properly mixed fuel prior to making any
adjustments. Refer to Oil and Fuel Information.
Clean Air Filter
The condition of the air filter is important to the operation
of the unit. A dirty air filter will restrict air flow and
change the air/fuel mixture. This is often mistaken for an
out of adjustment carburetor. Check the condition of the
air filter before adjusting the idle speed adjuster. Refer to
Air Filter Maintenance.
Fig. 17
Fig. 16
Do not sand blast,
scrape or clean
electrodes. Grit in the engine could damage
the cylinder.
CAUTION:
The unit will still run
during idle speed
adjustments. Wear protective clothing and
observe all safety instructions to prevent
serious personal injury.
WARNING:
If the exhaust
deflector assembly is
not tightened securely, it could fall off causing
damage to the unit and possible serious
personal injury.
WARNING:
Spark Arrestor
Screen
Spark Arrestor
Hood
Screw
Muffler
Engine
Tabs
Slots
14
MAINTENANCE AND REPAIR INSTRUCTIONS
Handlebar Knobs
Shaft Tube
Grip
TRANSPORTING
Allow the engine to cool before transporting.
Secure the unit while transporting.
Drain the fuel tank before transporting.
Tighten fuel cap before transporting.
MOVING THE UNIT
1. Allow the unit to cool before moving.
2. Loosen the knobs on the handlebar.
3. Fold the handlebars down as shown (Fig. 19).
4. Either carry the unit by the shaft tube grip or grasp
the center of the handlebar to use it as a carrying
handle (Fig. 20).
5. After the unit has been moved, reposition the
handlebars and continue operation.
CLEANING THE UNIT
Use a small brush to clean off the outside of the unit
and to keep the air vents free of obstructions.
Do not use strong detergents or petroleum based
cleaners, like kerosene. Some household cleaners
contain aromatic oils such as pine and lemon that
can damage the plastic housings or handles. Wipe
off any moisture with a soft cloth.
STORAGE
Never store a fueled unit where fumes may reach an
open flame or spark.
Allow the engine to cool before storing.
Store the unit in a locked up area to prevent
unauthorized use or damage.
Store the unit in a dry, well-ventilated area.
Store the unit out of the reach of children.
LONG TERM STORAGE
If you plan to store the unit for an extended time:
1. Drain all fuel from the fuel tank into a container. Do
not use fuel that has been stored for more than 60
days. Dispose of the old fuel in accordance to local
regulations.
2. Start the engine and allow it to run until it stalls. This
ensures that all fuel has been drained from the
carburetor.
3. Allow the engine to cool. Remove the spark plug and
put 1 oz. (30 ml) of 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
unit after storage.
4. 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.
4. Install a correctly gapped spark plug in the cylinder
head. Tighten by turning 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.
0.020 in.
(0.5 mm)
Fig. 18
Fig. 20
Fig. 19
To avoid serious
personal injury,
always turn your unit off and allow it to cool
before you clean or service it.
WARNING:
15
If further assistance is required, contact your authorized service dealer.
CAUSE ACTION
Old or improperly mixed fuel Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment Take to an authorized service dealer for an adjustment
Fouled spark plug Replace or clean the spark plug
Plugged spark arrestor Clean or replace spark arrestor
CAUSE ACTION
Empty fuel tank Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough Press primer bulb fully and slowly 10 times
Engine is flooded Squeeze the trigger and pull the starter rope
Old or improperly mixed fuel Drain gas tank and add fresh fuel mixture
Fouled spark plug Replace or clean the spark plug
Plugged spark arrestor Clean or replace spark arrestor
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
ENGINE LACKS POWER OR STALLS WHEN CULTIVATING
CAUSE ACTION
Air filter is plugged Replace or clean the air filter
Old or improperly mixed fuel Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment Adjust according to the Carburetor Adjustments section
CAUSE ACTION
Old or improperly mixed fuel Drain gas tank and add fresh fuel mixture
Improper carburetor adjustment Take to an authorized service dealer for an adjustment
Tines bound with grass Stop the engine and clean the tines
Dirty air filter Clean or replace the air filter
Plugged spark arrestor Clean or replace spark arrestor
TROUBLESHOOTING
16
SPECIFICATIONS
ENGINE*
DRIVE SHAFT and CULTIVATOR*
*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 .............................................................................................................................................................. 31 cc
Idle Speed RPM ......................................................................................................................................... 2,600-3,600 rpm
Operating RPM................................................................................................................................................... 7,800+ rpm
Clutch Type ......................................................................................................................................................... Centrifugal
Ignition Type.......................................................................................................................................................... Electronic
On/Off Stop Control....................................................................................................................................... Rocker Switch
Spark Plug Gap .................................................................................................................................... 0.020 inch (0.5 mm)
Lubrication................................................................................................................................................... Fuel/Oil Mixture
Fuel/Oil Ratio.................................................................................................................................................................. 40:1
Carburetor....................................................................................................................................... Diaphragm, All-Position
Starter............................................................................................................................................................... Auto Rewind
Muffler ..................................................................................................................................................... Baffled with Guard
Throttle............................................................................................................................................................ Spring Return
Fuel Tank Capacity................................................................................................................................. 14 ounces (415 ml)
Drive Shaft Tube .................................................................................................................................................. Steel Tube
Throttle Control ........................................................................................................................................ Finger-Tip Trigger
Cultivating Path Width (Maximum) ....................................................................................................... 9 inches (22.86 cm)
Cultivating Depth (Maximum) ............................................................................................................... 6 inches (15.24 cm)
Approximate Weight (no fuel) ......................................................................................................................... 26 lb. (12 kg)
17
NOTES
18
NOTES
19
California / EPA Emission Control Warranty Statement
Your Warranty Rights and Obligations
The California Air Resources Board, the Environmental Protection Agency and MTD LLC (MTD) are pleased to explain
the emission control system warranty on your 2005 and later small off-road engine. New small off-road engines must be
designed, built and equipped to meet stringent anti-smog standards. MTD must warrant the emission control system on
your small off-road engine for the periods of time listed below provided there has been no abuse, neglect or improper
maintenance of your small off-road engine.
Your emission control system may include parts such as the carburetor or fuel-injected system, the ignition system, and
catalytic converter. Also included may be hoses, belts, connectors and other emission-related assemblies.
Where a warrantable condition exists, MTD will repair your small off-road engine at no cost to you including diagnosis,
parts and labor.
The 2005 and later small off-road engines are warranted for two years. If any emission-related part on your engine is
defective, the part will be repaired or replaced by MTD.
Owners Warranty Responsibilities
• As the small off-road engine owner, you are responsible for the performance of the required maintenance listed in your
operator’s manual. MTD recommends that you retain all receipts covering maintenance on your small off-road engine,
but MTD cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all
scheduled maintenance.
• As the small off-road engine owner, you however should be aware that MTD may deny you warranty coverage if your
small off-road engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications.
• You are responsible for presenting your small off-road engine to a MTD Authorized Service Center as soon as a
problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.
If you have any questions regarding your warranty rights and responsibilities, you should call 1-800-345-8746.
Manufacturer’s Warranty Coverage
• The warranty period begins on the date the engine or equipment is delivered to the retail purchaser.
• The manufacturer warrants to the initial owner and each subsequent purchaser, that the engine is free from defects in
material and workmanship which cause the failure of a warranted part for a period of two years.
• Repair or replacement of warranted part will be performed at no charge to the owner at an Authorized MTD Service
Center. For the nearest location please contact MTD at: 1-800-345-8746.
• Any warranted part which is not scheduled for replacement, as required maintenance or which is scheduled for only
for regular inspection to the effect of “Repair or Replace as Necessary” is warranted for the warranty period. Any
warranted part which is scheduled for replacement as required maintenance will be warranted for the period of time up
to the first scheduled replacement point for that part.
• The owner will not be charged for diagnostic labor which leads to the determination that a warranted part is defective,
if the diagnostic work is performed at an Authorized MTD Service Center.
• The manufacturer is liable for damages to other engine components caused by the failure of a warranted part still
under warranty.
• Failures caused by abuse, neglect or improper maintenance are not covered under warranty.
• The use of add-on or modified parts can be grounds for disallowing a warranty claim. The manufacturer is not liable to
cover failures of warranted parts caused by the use of add-on or modified parts.
• In order to file a claim, go to your nearest Authorized MTD Service Center. Warranty services or repairs will be
provided at all Authorized MTD Service Centers.
• Any manufacturer approved replacement part may be used in the performance of any warranty maintenance or repair
of emission related parts and will be provided without charge to the owner. Any replacement part that is equivalent in
performance or durability may be used in non-warranty maintenance or repair and will not reduce the warranty
obligations of the manufacturer
• The following components are included in the emission related warranty of the engine, air filter, carburetor, primer, fuel
lines, fuel pick up/ fuel filter, ignition module, spark plug and muffler.
MANUFACTURER’S LIMITED WARRANTY FOR:
No implied warranty, including any implied warranty of
merchantability or fitness for a particular purpose,
applies after the applicable period of express written
warranty above as to the parts as identified. No other
express warranty or guaranty, whether written or oral,
except as mentioned above, given by any person or
entity, including a dealer or retailer, with respect to any
product shall bind MTD. During the period of the
Warranty, the exclusive remedy is repair or replacement
of the product as set forth above. (Some states do not
allow limitations on how long an implied warranty lasts, so
the above limitation may not apply to you.)
The provisions as set forth in this Warranty provide the
sole and exclusive remedy arising from the sales. MTD
shall not be liable for incidental or consequential loss or
damages including, without limitation, expenses incurred
for substitute or replacement lawn care services, for
transportation or for related expenses, or for rental
expenses to temporarily replace a warranted product.
(Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you.)
In no event shall recovery of any kind be greater than the
amount of the purchase price of the product sold. Alteration
of the safety features of the product shall void this Warranty.
You assume the risk and liability for loss, damage, or injury
to you and your property and/or to others and their property
arising out of the use or misuse or inability to use the
product.
This limited warranty shall not extend to anyone other than
the original purchaser, original lessee or the person for whom
it was purchased as a gift.
How State Law Relates to this Warranty: This warranty
gives you specific legal rights, and you may also have other
rights which vary from state to state.
To locate your nearest service dealer dial 1-800-345-8746
in the United States or 1-800-668-1238 in Canada.
MTD LLC
P.O. Box 361131
Cleveland, OH 44136-0019
The limited warranty set forth below is given by MTD
LLC (“MTD”) with respect to new merchandise purchased and
used in the United States, its possessions and territories.
MTD warrants this product against defects in material and
workmanship for a period of two (2) years commencing on the
date of original purchase and will, at its option, repair or
replace, free of charge, any part found to be defective in
material or workmanship. This limited warranty shall only apply
if this product has been operated and maintained in
accordance with the Operator’s Manual furnished with the
product, and has not been subject to misuse, abuse,
commercial use, neglect, accident, improper maintenance,
alteration, vandalism, theft, fire, water or damage because of
other peril or natural disaster. Damage resulting from the
installation or use of any accessory or attachment not
approved by MTD for use with the product(s) covered by this
manual will void your warranty as to any resulting damage. This
warranty is limited to ninety (90) days from the date of original
retail purchase for any MTD product that is used for rental or
commercial purposes, or any other income-producing purpose.
HOW TO OBTAIN SERVICE: Warranty service is available,
WITH PROOF OF PURCHASE THROUGH YOUR LOCAL
AUTHORIZED SERVICE DEALER. To locate the dealer in your
area, please check for a listing in the Yellow Pages or contact
the Customer Service Department of MTD LLC by calling
1-800-345-8746 or writing to P.O. Box 361131, Cleveland OH
44136-0019 or if in Canada call 1-800-668-1238. No product
returned directly to the factory will be accepted unless prior
written permission has been extended by the Customer
Service Department of MTD LLC.
This limited warranty does not provide coverage in the
following cases:
A. Tune-ups - Spark Plugs, Carburetor Adjustments, Filters.
B. Wear items - Bump Knobs, Outer Spools, Cutting Line,
Inner Reels, Starter Pulley, Starter Ropes, Drive Belts.
C. MTD does not extend any warranty for products sold or
exported outside of the United States of America, its
possessions and territories, except those sold through
MTD’s authorized channels of export distribution.
MTD reserves the right to change or improve the design of
any MTD Product without assuming any obligation to modify
any product previously manufactured.
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Yard Machines 21A-121R900 Manuel utilisateur

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