Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty
OPERATOR’S MANUAL
Front Tine Tiller — Model Series 390
IMPORTANT
READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-
covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).
If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law
(Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester
for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland,
Ohio 44136-0019.
FORM NO. 769-02988
12/15/2006
PRINTED IN U.S.A.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
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Safety Labels Found OnYour Tiller
1
Safety
Labels
WARNING
DO NOT remove safety
(or any) labels from
tiller for any reason.
3
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WARNING: Engine Exhaust, some of its constituents, and certain vehicle
components contain or emit chemicals known to State of California to cause
cancer and birth defects or other reproductive harm.
ꢀ
DANGER: This machine was built to be operated according to the rules for safe operation
in this manual. As with any type of power equipment, carelessness or error on the part of
the operator can result in serious injury. This machine is capable of amputating hands and
feet and throwing objects. Failure to observe the following safety instructions could result in
serious injury or death.
Safe
Operation
Practices
•
•
•
Never remove gas cap or add fuel while the engine
is hot or running.
Training
•
Read, understand, and follow all instructions on the
Allow engine to cool at least two minutes before
refueling
machine and in the manual(s) before attempting to
assemble and operate. Keep this manual in a safe
place for future and regular reference and for ordering
replacement parts.
Never over fill fuel tank. Fill tank to no more than ½
inch below bottom of filler neck to provide space for
fuel expansion.
•
•
Be familiar with all controls and their proper operation.
Know how to stop the machine.
•
•
Replace gasoline cap and tighten securely.
If gasoline is spilled, wipe it off the engine and
equipment. Move machine to another area. Wait five
minutes before starting the engine.
Never allow children under 14 years old to operate
this machine. Children 14 years old and over should
read and understand the operation instructions and
safety rules in this manual and should be trained and
supervised by a parent.
WARNING
•
Never store the machine or fuel container inside
near an open flame, spark or pilot light (e.g. furnace,
water or space heater, clothes dryer, etc.).
Allow machine to cool five minutes before storing.
This symbol points out
important safety in-
•
•
Never allow adults to operate this machine without
proper instruction.
•
structions which, if not
followed, could endanger
the personal safety and/or
property of yourself and
others. Read and follow all
instructions in this manual
before attempting to oper-
ate this machine. Failure
to comply with these
instructions may result in
personal injury. When you
see this symbol, HEED
ITS WARNING!
Keep bystanders, helpers, pets, and children at least
75 feet from the machine while it is in operation. Stop
machine if anyone enters the area.
Operation
•
•
•
Do not put hands or feet near rotating parts. Contact
with the rotating parts can amputate hands and feet.
Do not operate machine while under the influence of
alcohol or drugs.
Preparation
•
Thoroughly inspect the area where the equipment is
to be used. Remove all stones, sticks, wire, and other
foreign objects which could be tripped over and cause
personal injury.
Never operate this machine without good visibility or
light. Always be sure of your footing and keep a firm
hold on the handles.
•
Wear sturdy, rough-soled work shoes and close
fitting slacks and shirt. Loose fitting clothes or jewelry
can be caught in movable parts. Never operate this
machine in bare feet or sandals.
•
•
Keep bystanders, helpers, pets, and children at least
75 feet from the machine while it is in operation.
Stop the machine if anyone enters the area.
Be careful when tilling in hard ground. The tines may
catch in the ground and propel the tiller forward.
If this occurs, let go of the handle bars and do not
restrain the machine.
•
•
•
Disengage clutch levers and shift (if provided) into
neutral (“N”) before starting the engine.
Never leave this machine unattended with the engine
running.
•
•
Exercise extreme caution when operating on or
crossing gravel surfaces. Stay alert for hidden
hazards or traffic.
Never attempt to make any adjustments while engine
is running, except where specifically recommended in
the operator’s manual.
Never operate the machine at high transport speeds
on hard or slippery surfaces.
•
To avoid personal injury or property damage use
extreme care in handling gasoline. Gasoline is
extremely flammable and the vapors are explosive.
Serious personal injury can occur when gasoline is
spilled on yourself or your clothes which can ignite.
Wash your skin and change clothes immediately.
Use only an approved gasoline container.
Extinguish all cigarettes, cigars, pipes and other
sources of ignition.
•
•
Exercise caution to avoid slipping or falling.
Look down and behind and use care when in reverse
or pulling machine towards you.
•
Start the engine according to the instructions found
in this manual and keep feet well away from the tines
at all times.
•
•
•
Never fuel machine indoors.
4
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•
•
•
After striking a foreign object, stop the engine,
disconnect the spark plug wire and ground against
the engine Thoroughly inspect the machine for any
damage. Repair the damage before starting and
operating.
Maintenance & Storage
•
Never tamper with safety devices. Check their
proper operation regularly.
•
Check bolts and screws for proper tightness at
frequent intervals to keep the machine in safe
working condition. Also, visually inspect machine
for any damage.
ꢀ
Disengage all clutch levers (if fitted) and stop engine
before you leave the operating position (behind the
handles). Wait until the tines come to a complete
stop before unclogging the tines, making any adjust-
ments, or inspections.
Safe
Operation
Practices
•
•
Before cleaning, repairing, or inspecting, stop the
engine and make certain the tines and all moving
parts have stopped. Disconnect the spark plug
wire and ground it against the engine to prevent
unintended starting.
Never run an engine indoors or in a poorly ventilated
area. Engine exhaust contains carbon monoxide, an
odorless and deadly gas.
Do not change the engine governor settings or
over-speed the engine. The governor controls the
maximum safe operating speed of the engine.
Maintain or replace safety and instruction labels,
as necessary.
•
•
Muffler and engine become hot and can cause a
burn. Do not touch.
Use caution when tilling near fences, buildings and
underground utilities. Rotating tines can cause
property damage or personal injury.
•
•
•
Follow this manual for safe loading, unloading,
transporting, and storage of this machine.
Never store the machine or fuel container inside
where there is an open flame, spark or pilot light
such as a water heater, furnace, clothes dryer, etc.
Always refer to the operator’s manual for proper
instructions on off-season storage.
•
•
Do not overload machine capacity by attempting to
till soil too deep at too fast of a rate.
If the machine should start making an unusual noise
or vibration, stop the engine, disconnect the spark
plug wire and ground it against the engine. Inspect
thoroughly for damage. Repair any damage before
starting and operating.
WARNING
•
•
•
If the fuel tank has to be drained, do this outdoors.
Observe proper disposal laws and regulations for
gas, oil, etc. to protect the environment.
This symbol points out
important safety in-
•
•
•
Keep all shields, guards, and safety devices in place
and operating properly.
structions which, if not
followed, could endanger
the personal safety and/or
property of yourself and
others. Read and follow all
instructions in this manual
before attempting to oper-
ate this machine. Failure
to comply with these
instructions may result in
personal injury. When you
see this symbol, HEED ITS
WARNING!
Never pick up or carry machine while the engine is
running.
Your Responsibility
•
Restrict the use of this power machine to persons
who read, understand, and follow the warnings and
instructions in this manual and on the machine.
The safety labels on the tiller are shown in the
“Safety Labels” section. To ensure safe operation
of the tiller, follow the instructions on all labels
closely.
Use only attachments and accessories approved
by the manufacturer. Failure to do so can result in
personal injury.
•
•
If situations occur which are not covered in this
manual, use care and good judgment. Contact your
dealer or call the customer service number found on
page two.
5
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Tiller Setup
References to right and left side of tiller are determined
from behind the unit in the operating position.
3
Handle Attachment
1. Identify forward clutch cable (A) and reverse
clutch cables (B). Figure 3–1.
Assembly
NOTE: Stand behind
the tiller as if you were
going to operate it. Your
right hand corresponds
to right side of
Figure 3–1: Identify Cables.
Be sure not to kink cables while attaching.
2. Hook the “Z” end of the forward clutch cable
(A) into the forward tine engagement lever
Figure 3–2.
tiller; your left hand
corresponds to
left side of tiller.
3. Hook the “Z” end of the reverse clutch cable
(B) into the reverse tine engagement lever
Figure 3–2.
IMPORTANT
This unit is shipped
without gasoline or
oil in the engine. Fill
up gasoline and oil
as instructed in the
accompanying engine
manual BEFORE
operating your tiller.
Figure 3–2: Insert cables into levers.
4. Remove the hex bolt and cupped washer from
the right side of the frame. Hold the cable
guide bracket on the left side of frame as it
will fall when the bolt is removed.
Figure 3–3 Step 1.
5. Insert handle into tiller frame as shown. See
Figure 3–3 Step 2.
6. Insert bolt through the cupped washer, frame,
handle and into the cable guide bracket (note
the notch in the cable guide bracket goes
over the flange on the frame.) See Figure
3–3 Step 3. Tighten the bolt securely after
securing handle brace as seen in Figure 3–4.
Figure 3–3: Insert handle into frame.
6
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7. Locate the carriage bolt, bell washer and
hand knob packed with your unit.
8. Insert the carriage bolt through the welded
bracket on the handle, bell washer, handle
brace and into the hand knob.
3
See Figure 3–4.
Assembly
9. Select one of the three handle height
positions (three notches in welded handle
bracket) and tighten the hand knob to secure
the handle in the desired position.
Figure 3–4: Remove hardware from lower handle.
Figure 3–4. Return to lower handle and
tighten the hex bolt securely
Depth Gage Attachment
1. Disassemble the depth gage assembly as
seen in Figure 3–5. Retain the pin and clip for
later reassembly.
NOTE: Stand behind
the tiller as if you were
going to operate it. Your
right hand corresponds
to right side of
tiller; your left hand
corresponds to
left side of tiller.
Figure 3–5: Disassemble depth gage if necessary.
2. Remove the two screws from the rear of the
tiller frame as shown in Figure 3–6.
IMPORTANT
This unit is shipped
without gasoline or
oil in the engine. Fill
up gasoline and oil
as instructed in the
accompanying engine
manual BEFORE
operating your tiller.
3. Insert the depth gage bracket into the frame
and reinstall the two screws removed earlier.
Tighten the hex bolts securely.
See Figure 3–6.
Figure 3–6: Insert depth gage bracket into frame.
4. Insert the depth stake into the depth gage
bracket assembly as seen in Figure 3–7.
Secure the pin with the clip removed earlier.
The depth stake can be placed at various
positions. For setup purposes it is suggested
that the depth stake be assembled with the
stake just above or level with the ground
surface. For further instructions on the
Depth Stake refer to adjustments section
of this manual.
Figure 3–7: Reassemble depth stake.
ꢁ
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Reverse Tine
Engagement Lever
Your Tiller
4
Handle
Operating
Your Tiller
Forward Tine
Engagement Lever
Throttle Control
Handle Knob
Depth Stake
WARNING
The tine clutch control
is a safety device. Never
attempt to bypass its
operation.
End Cap
Tiller Tines
Use extreme care when
handling gasoline.
Figure 4–1:The major parts of the tiller
Gasoline is extremely
flammable and the vapors
are explosive. Never fuel
tiller indoors or while
engine is hot or running.
Extinguish cigarettes,
cigars, pipes, and other
sources of ignition.
WARNING: Read, understand, and
Tines and End Caps
Tilling tines and end caps are used to cultivate, furrow
and prepare your garden for seeding. End caps are used
to avoid tilled soil from overflowing onto unwanted areas.
follow all instructions and warnings
posted on the machine and in this
manual before operating.
Handle Knob
Forward Tine Engagement Lever
The forward tine control lever is located beneath the
upper section of the handle. Squeezing the lever against
the handle engages the tine drive. Release the lever to
stop the tines from turning.
The handle height may be adjusted. Loosen the knob to
change the position. Tighten hardware when complete.
Keep hands and feet away
from the tines. Refer to
warning label on the unit.
Engine Controls
NOTE: Refer to engine manual for additional information
and functions of the engine controls.
Reverse Tine Engagement Lever
The reverse tine control lever is located on top of the
upper section of the handle. Pulling the lever toward
operator engages the tines in reverse. Release the lever
to stop the tines from turning in reverse.
Throttle Control
The throttle controls engine’s speed. Use maximum
engine speed when tilling. Stop the engine when
tranporting the tiller.
Choke Lever
Choke lever is located next to the throttle lever. It is used
to enrich the fuel mixture when starting a cold engine.
Note: Never engage both the forward and reverse tine
drives at the same time. Engaging both forward and
reverse tine drives at the same time could damage the
belt drives and cause the engin to stall.
Recoil Starter
The recoil starter is located on the right side of the engine
and is used to manually start the engine.
Depth Stake
The depth stake controls the tilling depth. Refert to
Operating Your Tiller later in this section for further
instructions on its use.
8
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OperatingYour Tiller
WARNING: Read, understand, and
Refer to the engine manual for instructions.
4
follow all instructions and warnings
posted on the machine and in this
manual before operating.
1. Attach spark plug wire to spark plug. Make sure the
metal cap on the end of the spark plug is fastened
securely over the metal tip on the spark plug.
Operating
Your Tiller
2. Make sure that the tine clutch control is disengaged.
3. Place the engine speed control in the START
position (if so equiped).
Before Starting
Gas And Oil Fill-Up
4. Push primer two (2) or three (3) times. Wait about
two (2) seconds between each push.
Service the engine with gasoline and oil as instructed in
the separate engine manual packed with your tiller. Read
instructions carefully.
Note: Primer may be needed to restart a warm engine
after shutdown.
WARNING: Use extreme care when
handling gasoline. Gasoline is
extremely flammable and the vapors are
explosive. Never fuel machine indoors
or while the engine is hot or running.
5. Pull rope out slowly until engine reaches the
beginning of its compression cycle (rope will pull
slightly harder at this point).
6. Pull rope with a rapid, continuous, full arm stroke.
Keep a firm grip on handle. Let rope rewind slowly.
Do not let recoil starter snap back against engine.
Repeat until engine starts.
WARNING
Starting Engine
Be sure no one other
than the operator is
standing near the tiller
while starting engine
or operating the unit.
Never run engine
indoors or in enclosed,
poorly ventilated
areas. Engine exhaust
contains carbon
monoxide, an odorless
and deadly gas. Keep
hands, feet, hair and
loose clothing away
from any moving parts
on engine and tiller.
7. Repeat prvious steps until engine starts. Refer to
engine manual for addtional engine information.
WARNING: Be sure no one is standing
in front of the tiller while the engine is
running or being started.
Refer to the engine manual for instructions.
Stopping Engine
1. Attach spark plug wire to spark plug. Make sure the
metal cap on the end of the spark plug is fastened
securely over the metal tip on the spark plug.
Move throttle control lever to STOP or OFF position.
Refer to the engine manual for instructions on stopping
the engine.
2. Make sure that the tine clutch control is disengaged.
3. Move throttle control to FAST position.
4. Move/pull out choke lever to CHOKE position when
starting cold engine (if so equiped).
5. Pull rope out slowly until engine reaches the beginning
of its compression cycle (rope will pull slightly harder
at this point).
6. Pull rope with a rapid, continuous, full arm stroke.
Keep a firm grip on handle. Let rope rewind slowly. Do
not let recoil starter snap back against engine. Repeat
until engine starts.
7. Move/push in choke lever once engine warms up
enough to run smoothly.
Refer to the engine
manual for detailed
engine instructions.
8. Move throttle to FAST position for tilling.
9
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UsingYour Tiller
Your tiller is designed for seed bed preparation, cultivat-
ing, furrowing, and mulching.
4
Wheel Position
The tiller is shipped with the wheels adjusted so that the
unit sits level. The wheels need to be adjusted to meet
your tilling needs before operation. This adjustment is
made by removing the clevis pin from the wheel yoke
and raising the wheels to the desired height.
See Figure 4–3.
Operating
Your Tiller
Figure 4–3: Wheel and depth stake positioning.
Figure 4–4: Wheel and Yoke forward for shallow tilling.
Figure 4–5: Wheel and Yoke back for deeper tilling.
Tilling Depth and Wheel
Yoke Adjustment
Placement of wheel yoke will effect depth of tilling.
WARNING
Yoke Forward
Place the wheel yoke so that wheels are forward (near-
est to tines) for shallow tilling, cultivating and transport.
See Figure 4–4.
Be sure no one other
than the operator is
standing near the tiller
while starting engine
or operating the unit.
Never run engine
indoors or in enclosed,
poorly ventilated
areas. Engine exhaust
contains carbon
monoxide, an odorless
and deadly gas. Keep
hands, feet, hair and
loose clothing away
from any moving parts
on engine and tiller.
Yoke to Back
Place the wheel yoke so that wheels are toward rear
(closest to depth stake) for deep tilling and cultivating.
See Figure 4–5.
Depth Stake
The depth stake acts as a brake for the tiller and
controls the depth and speed at which the machine will
operate. Remove the clevis pin and hairpin clip to raise
or lower depth stake. See Figure 4–6.
Handle Pressure
Further control of tilling depth and travel speed can be
obtained by variation of pressure on the handles.
A downward pressure on the handles will reduce the
working depth and increase the forward speed. An
upward pressure on the handles will increase the
working depth and reduce the forward speed.
The type of soil and working conditions will determine
the actual setting of the depth stake and the handle
pressure required.
Refer to the engine
manual for detailed
instructions pertaining
to the engine controls.
Transporting and
Storing the Tiller
To transport and store the tiller move the throttle to the
stop position. Pivot the depth stake away from ground up
between wheels. See Figure 4-6.
Figure 4–6: Pivot depth stake for transportation.
10
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Tilling Procedure
When tilling, leave approximately eight inches of untilled
soil between the first and second tilling paths, then make
the third path between the first and second, Figure 4–7.
In some soils, the desired depth is obtained the first
time over the garden. In other soils, the desired depth
is obtained by going over the garden two or three times.
Passes should be made across the length and width of
the garden alternately. Rocks which are turned up should
be removed from the garden area.
4
4 5 2 3 1
Operating
Your Tiller
Figure 4–7: Recommended tiller paths.
With the outer tines installed, the working width of the
machine is 24 inches. This width may be expanded to
26 inches by removing the clevis and cotter pins, sliding
each outer tine outward away from the center of the unit
and resecuring the pins in the holes provided.
See Figure 4–8.
WARNING
Removing End Caps
The end cap, which is used to avoid tilled soil from
overflowing onto unwanted areas, are removable from the
axle. Remove the hairpin clip and clevis pin that secure
each end cap and slide the end caps off the axle.
See Figure 4–9.
Be sure no one other
than the operator is
standing near the tiller
while starting engine
or operating the unit.
Never run engine
indoors or in enclosed,
poorly ventilated
areas. Engine exhaust
contains carbon
monoxide, an odorless
and deadly gas. Keep
hands, feet, hair and
loose clothing away
from any moving parts
on engine and tiller.
Figure 4–8: Moving and removing outer tines.
Cultivating
For cultivating, a two to three inch depth is desirable.
The tine width can be reduced to 13 inches by removing
the outer tines completely from the tiller. See figure 4–8.
When laying out plant rows, be sure to allow enough
width to permit cultivation between the rows. In growing
corn or similar crops, check-row planting will permit cross
cultivation and practically eliminate hand hoeing.
Figure 4–10.
Figure 4–9: Removing end caps.
The tiller has many uses other than tilling and cultivating
a garden. One of these is the preparation of lawn area for
seeding. The tiller will prepare a deep seed bed which will
be free of hard untilled spots, allowing a better stand of
grass to grow. The tiller is very useful for loosening hard
soil for excavation with a shovel; No tedious handwork
will be necessary. Your tiller may be used for mixing
compost in the pile or for mixing it with the soil in your
garden. This should be done after the soil has been
broken to the full working depth. The compost should be
worked in to a depth of six to seven inches. This may be
done by working the length of the garden and then by
making separate passes across its width. The addition
of decayed organic matter will substantially increase
the fertility of your garden. For proper decaying action,
fertilizer should be applied and worked in with the mulch
materials. Breaking up leaves and straw and mixing it with
several inches of soil allows proper aeration of the plant
root system and retards the growth of weeds.
Refer to the engine
manual for detailed
instructions pertaining
to engine controls.
Figure 4–10: Allow area between rows for cultivation.
11
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WARNING: Disconnect the spark plug
wire and ground it against the engine
before performing any repairs.
Lubrication
Pivot Points
Remove the belt cover and lubricate all pivot points and
linkages at least once a season with light oil. Keep belts
free of lubrication.
Engine
Refer to the separate engine manual for engine
maintenance instructions.
5
Tine Shafts
Maintaining
Your Tiller
Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and follow
instructions carefully.
Remove tine assemblies and lubricate the tine shafts at
least once a season.
Wheel Shafts
Remove wheel assemblies and lubricate the axle shafts
at least once a season.
Service air cleaner every ten hours under normal
conditions. Clean every hour under extremely dusty
conditions. Poor engine performance and flooding
usually indicates that the air cleaner should be serviced.
To service the air cleaner, refer to the separate engine
manual packed with your unit.
Chain Drive
The chain drive is pre-lubricated and sealed at factory.
Cleaning Tine Area
IMPORTANT: Never run your engine without air cleaner
completely assembled.
Clean underside of the tine shield after each use. The
dirt washes off the tines easier if rinsed off immediately
instead of after it dries. Always towel dry the tiller
afterwards and apply a light coat of oil or silicone to
prevent rusting or water damage.
WARNING
The spark plug should be cleaned and the gap
reset every 25 hours of engine operation. Spark plug
replacement is recommended at the start of each tiller
season; check engine manual for correct plug type and
gap specification.
Disconnect the spark
plug wire and ground
it against the engine
before performing
any repairs or
IMPORTANT: Never use a “pressure washer” to clean
your tiller. Water can penetrate tight areas of the tiller
and its chain case and cause serious damage to unit.
Clean the engine regularly with a cloth or brush. Keep
the cooling system (blower housing area) clean to
permit proper air circulation which is essential to engine
performance and life. Be certain to remove all dirt and
combustible debris from muffler area.
maintenance.
Belt Replacement
Reverse Drive Belt
Your tiller has been engineered with a belt made of
special material (Kevlar Tensile) for longer life and better
performance. It should not be replaced with an off-the-shelf
belt. Order all belts through you authorized service dealer.
1. Disconnect and ground the spark plug wire against
the engine.
2. Remove the belt cover from the left side of the tiller by
removing the two self-tapping screws and hex stop nut
and washer.
See Figure 5–1.
3. Remove belt from transmission pulley and then from
around the reverse idler pulley. See Figure 5–2.
4. To reassemble new belt. Follow instructions in reverse
order. Be sure to place wider side of belt against
transmission and idler pulley while slimmer side goes
over the engine pulley. See Figure 5–2.
Figure 5–1: Screw and nut removal.
NOTE: Upon reassembly, make certain the belt is routed
over the idler pulley and inside of belt keepers by engine
pulley. See Figure 5–2.
Figure 5–2: Reverse drive belt removal.
1ꢀ
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Belt Replacement
Forward Drive Belt
1. Remove reverse drive belt as instructed in the
previous section.
5
2. Remove the return spring. See Figure 5–3.
3. Remove idler pulley bolt and move belt from under
idler pulley keeper. See Figure 5–4.
Maintaining
Your Tiller
4. The forward idler belt will not clear the belt keepers
near the engine pulley. You must remove the reverse
idler bracket to allow the belt to move off of the engine
pulley. Remove the two securing screws and move
the bracket toward the transmission pulley. Retain the
screws for reassembly. See Figure 5–5.
5. Remove belt from the reverse idler pulley and then
from around the transmission pulley. See Figure 5–6.
Figure 5–4: Idler pulley keeper belt removal.
6. To reassemble new belt. Follow instructions in reverse
order. Be sure to place wider side of belt away from
the engine and transmission pulleys.
NOTE: Upon reassembly, make certain the idler pulley
keeper is as shown in Figure 5–4. Take note of the
notch on the bottom of the keeper and alignment when
reassembling with the replacement belt.
WARNING
Remove
Screws
Do not move the gear
selection handle
with the wheels or
tines engaged. Make
certain the unit is
stopped completely
before changing the
gear selection. A
partial engagement
may be necessary
when engaging tines.
Do not push down
on handles so that
wheels are lifted off
the ground while
Figure 5–5: Bracket screw removal.
using the tine drive,
or tiller could move
backward and cause
personal injury.
Return Spring
Never attempt
to make any
adjustments
while engine is
running, except
where specified in
operator’s manual.
Figure 5–3: Return spring removal.
Figure 5–6: Forward drive belt removal.
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Cable Adjustment
From time to time you may need to adjust the tension on
the forward and reverse tine engagement cables.
1. Disconnect and ground the spark plug wire against
the engine.
5
Reverse Tine
Engagement Cable
2. Adjust either the forward or reverse clutch cable by
loosening the hex nut. See Figure 5–8.
Maintaining
Your Tiller
3. Turn the cable collar section one or two turns to add or
lesson tension on the cable. See Figure 5–9.
4. Retighten the lock nut against the cable collar.
See Figure 5–10.
Forward Tine
Engagement Cable
5. With the forward and reverse tine engagement
handles in neutral (released) positions, pull the starter
rope several times. The tines should not turn. If they
turn forward, adjust the forward tine engagement
cable to release tension using the previous steps in
this section. If the tines turn toward rear, adjust the
reverse tine engagement cable to lesson the tension
as with previous steps. Check again for correct
tension on cables.
Figure 5–7: Reverse drive belt removal.
WARNING
Disconnect the spark
plug wire and ground
it against the engine
before performing
any repairs or
Lock Nut
maintenance.
Figure 5–8: Reverse drive belt removal.
Cable Collar
Lock Nut
Figure 5–9: Reverse drive belt removal.
Figure 5–10: Reverse drive belt removal.
14
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3. Refer to the engine manual for correct engine
storage instructions.
Off-Season Storage
If the tiller will not be used for a period longer than 30 days, the
following steps should be taken to prepare the tiller for storage.
4. Wipe tines with oiled rag to prevent rust.
5. Store tiller in a clean, dry area. Do not store next to
corrosive materials, such as fertilizer.
1. Clean the exterior of engine and the entire tiller
thoroughly. Lubricate the tiller as described in the
lubrication instructions.
6
NOTE: When storing any type of power equipment in an
unventilated or metal storage shed, care should be taken
to rustproof the equipment. Using a light oil or silicone,
coat the equipment and especially any springs, bearings,
and cables.
Trouble
Shooting
Guide
2. We do not recommend the use of pressure washers
to clean your unit. They may cause damage to electric
components, spindles, pulleys, bearings or the engine.
The use of pressure washers will result in shortened
life and reduce serviceability.
WARNING
Trouble
Engine fails to start Fuel tank empty, or stale fuel.
Possible Cause(s)
Corrective Action
Fill tank with clean, fresh gasoline. Fuel will not last
over thirty days unless a fuel stabilizer is used.
Do not move gear
selection handle
Throttle control lever not in correct Move throttle lever to start position.
with the wheels or
tines engaged. Make
certain the unit is
stopped completely
before changing the
gear selection. A
starting position (if so equipped).
Blocked fuel line.
Dirty air cleaner.
Choke not in ON position.
Spark plug wire disconnected.
Faulty spark plug.
Clean fuel line.
Refer to the engine manual packed with your unit.
Move switch to ON position.
Connect wire to spark plug.
Clean, adjust gap or replace.
Refer to the engine manual packed with your unit.
Engine flooded.
Engine runs erratic Unit running on CHOKE.
Spark plug wire loose.
Blocked fuel line or stale fuel.
Move choke lever to OFF position.
Connect and tighten spark plug wire.
Clean fuel line; fill tank with clean, fresh gasoline. Fuel will
not last over thirty days unless a fuel stabilizer is used.
Clear vent.
Drain fuel tank. Refill with fresh fuel.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
partial engagement
may be necessary
when engaging tines.
Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Do not push down
on handles so that
wheels are lifted off
the ground while
using tine drive, or
the tiller could move
backward and cause
personal injury.
Carburetor out of adjustment.
Engine overheats
Engine oil level low.
Dirty air cleaner.
Air flow restricted.
Fill crankcase with proper oil.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Carburetor not adjusted properly. Adjust carburetor as instructed in separate engine manual.
Tines do not
engage
Foreign object lodged in tines.
Tine clevis pin(s) missing.
Pulley and idler not in correct
adjustment.
Dislodge foreign object.
Replace tine clevis pin(s).
Take unit to authorized service dealer.
Never attempt
to make any
adjustments while
the engine is
Not shifting properly.
Refer to Controls section of operator’s manual for
proper shifting procedures.
Control cable not adjusted properly. Adjust control cable (see assembly instructions).
Belt worn and/or stretched.
Replace belt.
running, except
where specified in
operator’s manual.
Tines skip over
ground
Improper rotation.
Forward rotation should only be used on soil that has
already been tilled, not on virgin soil.
Wheels do not
engage
Clevis pin missing.
Replace clevis pin.
Tiller is not being shifted properly. Refer to Controls section of operator’s manual for
proper shifting procedures.
Control cable not adjusted properly. Adjust control cable (see assembly instructions).
Belt worn and/or stretched.
Replace belt.
15
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10
6
9
4
1
11
2
12
13
5
3
7
2
††Standard Briggs & Stratton
Tecumseh Engines
8
50
14
51††
52††
50
16
54
15
54
53††
55
55
19
30
22
49
21
29
26
28
27
20
38
31
32
23
35
36
37
42
56
34
37
25
24
33
30
40
39
41
56
23
30
43
47
46
27
48
16
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9
Illustrated
Parts List
Ref. Part No.
Part Description
Ref. Part No.
Part Description
1
2
3
4
5
6
7
8
9
712-0442 Acorn Lock Nut 1/4-20
736-3020 Flat Washer.271” I.D. x.630” O.D.
720-0270A Reverse Handle Grip
731-1600 Handle Cover w/o throttle
710-0779A Truss Mach. Scr. #10 x 1/2” Lg.
720-0274 Handle Grip
28 710-0805 Hex Bolt 5/16-18 x 1.5” Lg.
29 710-0189 Hex Bolt 5/16-18 x 3” Lg.
30 736-0242 Wash. Bell.340” I.D. x.872” O.D.
31 711-1036A Spec. Hex Nut
Model 390
Series
32 736-0119 L-Wash. 5/16” I.D.
33 710-3008 Hex Bolt 5/16-18 Gr. 5
34 786-0129 Cable Guide Bracket
35 710-0604A Hex Washer Screw 5/16-18 x.62” Lg.
36 710-0602 Hex Wash. Hd.TT-Tap Scr.
37 738-0934 Shdl. Bolt 5/16-18
712-3006 Hex Nut 1/4-20 Gr.2
726-0135 Cap Speed Nut
686-0083 Clutch Handle Assembly
10 720-0269 Clutch Grip
11 710-0641 Hex Bolt 1/4-20 x 2.25” Lg. Gr.5
12 731-1645A Clutch Handle Holder
13 736-0140 Flat Washer.385” I.D. x.62” O.D.
14 686-0014A Reverse Handle Ass’y
15 736-0264 Flat Washer.344” I.D. x.62” O.D.
16 649-04040 Handle Assembly Comp.
19 749-1401 Handle Brace † or †††
20 736-0921 Lock Washer 1/2 † or †††
21 710-3194 Hex Bolt 1/2-20 Gr. 5 † or †††
22 786-0005 Depth Bar
38 786-0138A Frame (R.H.)
To order replacement
parts, contact
1 (800) 800-7310
or visit
39 786-0139A Frame (L.H.)
40 736-0171 Lock Washer 7/16
41 712-0240 Jam Nut 7/16-20 Gr. 2
42 710-0176 Hex Bolt 5/16-18 x 2.75” Lg.
43 712-0429 Hex Nylon Nut 5/16-18 Thd.
46 686-0081A Wheel Hanger Bracket Assembly
47 734-1781 Wheel Ass’y 8” x 1.75”(Plastic)
734-1566 Wheel Ass’y 8” x 1.75” (Steel)
48 738-0929 Shoulder Screw.496 I.D. x 1.445 O.D.
49 750-0890 Spacer
23 714-0149B Cotter Pin
24 712-04063 Hex Flange L-Nut 5/16-18 Thd. Gr.5
25 786-0003 Tail Piece Bracket (L.H.)
26 786-0004 Tail Piece Bracket (R.H.)
27 711-0415 Clevis Pin
50 710-1236 Carr. Bolt 5/16-18 x 1
51 749-0915A Engine Tube Brace (Std. B&S)
749-1082 Engine Tube Brace (Tec.)
52 712-04063 Hex Flange L-Nut 5/16-18 Thd. ††
53 786-0159 Engine Brkt. (Std. B&S)
55 736-0242 Bell. Wash.34” I.D.
† Briggs & Stratton Intek Engine
†† Standard Briggs & Stratton
and Tec. Engine
52 720-0195 Hand Knob
53 750-0470 Spacer
††† Honda Engine
1ꢁ
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26
25
48
24
24
23
13
30
29
31
49
34
3
27
28
32
35
36
10
42
33
6
10
†††Honda Engine
45
22
38
14
50
9
7
5
53
52
51
6
10
8
54
43
44
7
11
4
47
5
46
1
19
16
2
20
3
21
17
18
18
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9
Illustrated
Parts List
Ref. Part No.
Part Description
Ref. Part No.
Part Description
1
2
3
4
5
6
7
8
9
712-0392 Hex L-Stop nut 1/4-28
736-3020 Flat Wash.266” I.D. x.625” O.D.
710-0599 Hex Washer TT-Tap Scr. 1/4-20 x.5”
711-0920 Belt Cover Bolt
26 748-0350 Pulley Mounting Adapter
27 736-0112 Bell-Wash.525” I.D. x 1.5” O.D.
28 712-3029 Hex Jam Nut 1/2-20 Thd.
29 732-0697 Return Spring
Model 390
Series
712-04063 Hex Flange Top L-Nut 5/16-18
710-0723 Hex Hd. Scr. 3/8-16 x 1.25” Lg.
756-0313 Flat Idler Pulley 2.12” O.D.
786-0149 Idler Belt Keeper
30 786-0040B Reverse Bracket
31 736-0119 Lock Washer 5/16
32 710-0237 Hex Bolt 5/16-24 x.625”
33 756-0971 Engine Inner Half Pulley
34 756-0600 Reverse Engine Pulley
35 736-0452 Bell Washer.396” I.D. x 1/14” O.D.
36 710-1093 Hex Bolt 3/8-24 x 1.00”
38 686-0013 Reverse Arm Assembly
42 786-0041 Reverse Belt Keeper
43 710-0502A Hex L-Wash.TT-Tap 3/8-16 x 1.25”
44 786-0145A Engine Plate
786-0144 Idler Bracket
10 712-0266 Hex Cent. Jam Nut 3/8-16 Thd.
11 786-0057 Belt Cover
To order replacement
parts, contact
1 (800) 800-7310
or visit
13 786-0043A Tine Shield
14 710-3008 Hex Hd. Cap Scr. 5/16-18 x.75” Lg
16 686-0091 Chain Case Assembly Complete
17 686-0106 Outer Disc Plate Assembly
18 714-0149B Internal Cotter Pin
19 711-0415 Clevis Pin
45 786-0053 Tine Shield Bracket
46 736-0171 L-Wash. 7/16” I.D.
20 642-0023 Outer Tine Assembly L.H.
642-0024 Outer Tine Assembly R.H.
21 642-0003 Inner Tine Assembly L.H.
642-0002 Inner Tine Assembly R.H.
22 746-0918 Forward Clutch Cable
23 746-0953 Reverse Clutch Cable
24 756-0585 Fl-Pulley 6” Dia.
47 712-0240 Hex Nut 7/16-20 Thd.
48 754-0428 V-Belt (Forward) 1/2 x 41.9”
49 754-0429 V-Belt (Reverse) 3/8 x 45.68”
50 738-0102 Shld. Screw.498 x 1.445
51 738-0930 Shld. Screw.560 x.165
52 710-0805 Screw 5/16-18 x 1.50 †††
53 712-3010 Hex Nut 5/16-18 †††
54 736-0242 Bell Washer †††
25 750-0892 Spacer.64” Dia. x 2.4” Lg.
††† Honda Engine
19
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MANUFACTURER’S LIMITED WARRANTY FOR
The limited warranty set forth below is given by MTD LLC with respect
to new merchandise purchased and used in the United States, its
possessions and territories.
e. MTD does not extend any warranty for products sold or exported
outside of the United States, its possessions and territories, except
those sold through MTD’s authorized channels of export distribution.
“MTD” warrants this product against defects in material and workman-
ship 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 materials or workmanship. This limited war-
ranty 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 part, 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.
Normal wear parts are warranted to be free from defects in material and
workmanship for a period of thirty (30) days from the date of purchase.
Normal wear parts include, but are not limited to items such as: batter-
ies, belts, blades, blade adapters, grass bags, rider deck wheels, seats,
snow thrower skid shoes, shave plates, auger spiral rubber and tires.
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, check your Yellow Pages,
or contact MTD LLC at P.O. Box 361131, Cleveland, Ohio 44136-
0019, or call 1-800-800-7310 or 1-330-220-4683 or log on to our
f. Replacement parts that are not genuine MTD parts.
g. Transportation charges and service calls.
No implied warranty, including any implied warranty of mer-
chantability of 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, 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.
The provisions as set forth in this warranty provide the sole and
exclusive remedy arising from the sale. MTD shall not be liable
for incidental or consequential loss or damage including, without
limitation, expenses incurred for substitute or replacement lawn
care services or for rental expenses to temporarily replace a
warranted product.
Some states do not allow the exclusion or limitation of incidental or
consequential damages, or limitations on how long an implied warranty
lasts, so the above exclusions or limitations 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 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 misuse or inability to use the product.
This limited warranty shall not extend to anyone other than the original
purchaser or to the person for whom it was purchased as a gift.
HOW STATE LAW RELATES TO THIS WARRANTY: This limited
warranty gives you specific legal rights, and you may also have other
rights which vary from state to state.
This limited warranty does not provide coverage in the following cases:
a. The engine or component parts thereof. These items may carry a
separate manufacturer’s warranty. Refer to applicable manufacturer’s
warranty for terms and conditions.
b. Log splitter pumps, valves, and cylinders have a separate one year
warranty.
c. Routine maintenance items such as lubricants, filters, blade
sharpening, tune-ups, brake adjustments, clutch adjustments, deck
adjustments, and normal deterioration of the exterior finish due to
use or exposure.
IMPORTANT: Owner must present Original Proof of Purchase to obtain
warranty coverage.
d. Service completed by someone other than an authorized service
dealer.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019; Phone: 1-800-800-ꢁ310, 1-330-ꢀꢀ0-4683
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