Yard Machines 340 User Manual

OPERATOR’S MANUAL

FRONT TINE

TILLERS

Models

340 Thru 390

Model 340 Shown

IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY

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 368022 Cleveland, Ohio 44136-9722.

MTD PRODUCTS INC. P.O. BOX 368022 CLEVELAND, OHIO 44136-9722

PRINTED IN U.S.A. FORM NO. 770-8576A

SECTION 1: IMPORTANT SAFE OPERATION PRACTICES

WARNING: THIS SYMBOL POINTS OUT IMPORTANT SAFETY INSTRUCTIONS 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 OPERATE YOUR TILLER. FAILURE TO COMPLY WITH THESE
INSTRUCTIONS MAY RESULT IN PERSONAL INJURY. WHEN YOU SEE THIS SYMBOL—

HEED ITS 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.

DANGER: Your tiller 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 tiller is capable of amputating hands and feet. Failure to observe the
following safety instructions could result in serious injury or death.

1. GENERAL OPERATION

• Read this operator’s manual carefully in its entirety
before attempting to assemble this machine. Read,
understand, and follow all instructions on the
machine and in the manual(s) before operation. Be
completely familiar with the controls and the proper
use of the machine before operating it. Keep this
manual in a safe place for future and regular
reference and for ordering replacement parts.

• Your tiller is a powerful tool, not a plaything.
Therefore, exercise extreme caution at all times.
Your unit has been designed to perform one job: to
till soil. Do not use it for any other purpose.

• Never allow children under age 14 to operate the
unit. Children 14 years and older should only
operate the unit under close parental supervision.
Only responsible individuals who are familiar with
these rules of safe operation should be allowed to
use your unit.

• Do not operate tiller while under the influence of
alcohol or drugs.

• Keep the area of operation clear of all persons,
particularly small children and pets. Stop the
engine when they are in the vicinity of your tiller.

• Wear sturdy, rough-soled work shoes and close
fitting slacks and shirt. Shirt and slacks that cover
the arms and legs and steel-toed shoes are
recommended. Do not wear loose fitting clothes or
jewelry and secure hair so it is above shoulder
length. They can be caught in moving parts. Never
operate a unit in bare feet, sandals or sneakers.

• Operate tiller only in daylight or good artificial light.

• Do not start tiller unless the shift lever (if provided)
is in the neutral (N) position.

• Do not allow anyone to stand or walk in front of
tiller when starting or running engine.

• Do not place feet or hands on or near the tines
when starting the engine or while the engine is
running.

• Never attempt to make depth bar, tine width,
cable, handle, or wheel adjustments while the
engine is running.

• Do not leave the tiller unattended with the engine
running.

• Before attempting to remove rocks, bricks and
other objects from tines, stop the engine and be
sure the tines have stopped completely.
Disconnect the spark plug wire and move it away
from the spark plug.

• If your machine should start making an unusual
noise or vibration, immediately stop the engine and
allow the machine to come to a complete stop.
Disconnect the spark plug wire and move it away
from the spark plug. Take the following steps:

• Inspect for damage.

• Repair or replace any damaged parts.

• Check for any loose parts and tighten to
assure continued safe operation.

• Muffler and engine become hot and can cause a
burn. Do not touch.

• Keep all shields, guards and safety devices in
place and operating properly.

• Use caution when tilling near fences, buildings and
underground utilities. Rotating tines can cause
damage or injury.

• Do not operate engine if air cleaner or cover over
carburetor air intake is removed, except for
adjustment. Removal of such parts could create a
fire hazard.

2

• Only use accessories approved for this machine
by the manufacturer. Read, understand, and follow
all instructions provided with the approved
accessory.

• If situations occur which are not covered by this
manual, use care and good judgment. Contact
your dealer for assistance.

2. CHILDREN

• Tragic accidents can occur if the operator is not
alert to the presence of small children. Children
are often attracted to the tilling activity. Never
assume that children will remain where you last
saw them.

• Keep children out of the work area and under the
watchful eye of a responsible adult other than the
operator.

• Be alert and turn the unit off if a child enters the
area.

• Never allow children under the age of 14 to
operate the tiller.

3. SERVICE

• Use extreme care in handling gasoline and other
fuels. They are extremely flammable and the
vapors are explosive.

• Store fuel and oil in approved containers, away
from heat and open flame, and out of the reach of
children. Check and add fuel before starting the
engine. Never remove gas cap or add fuel while
the engine is running. Allow engine to cool at least
two minutes before refueling.

• Replace gasoline cap securely and wipe off any
spilled gasoline before starting the engine as it
may cause a fire or explosion.

• Extinguish all cigarettes, cigars, pipes and other
sources of ignition.

• Never refuel unit indoors because flammable
vapors will accumulate in the area.

• Never store the machine or fuel container inside
where there is an open flame or spark such as a
gas hot water heater, space heater, clothes dryer
or furnace.

• Never run your machine in an enclosed area as
the exhaust from the engine contains carbon
monoxide, which is a odorless, tasteless and
deadly poisonous gas.

• To reduce fire hazard, keep engine and muffler
free of leaves, grass, and other debris build-up.
Clean up fuel and oil spillage. Allow unit to cool at
least 5 minutes before storing.

• Before cleaning, repairing, or inspecting, make
certain the tines and all moving parts have
stopped. Disconnect the spark plug wire and keep
wire away from spark plug to prevent accidental
starting. Do not use flammable solutions to clean
air filter.

• Keep all nuts, bolts, and screws tight to be sure
the equipment is in safe working condition.

• Never tamper with safety devices. Check their
proper operation regularly.

• Do not alter or tamper with the engine’s governor
setting. The governor controls the maximum safe
operating speed of the engine. Overspeeding the
engine is dangerous and will cause damage to the
engine and to other moving parts of the machine.

WARNING — 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.

Figure 1 Safety labels found on your unit

3

SECTION 2: FINDING YOUR MODEL NUMBER

This Operator’s Manual is an important part of your new tiller. It will help you assemble, prepare and maintain
your tiller. Please read and understand what it says.
Before you start to prepare your tiller for its first use, please locate the model plate and copy the information
from it in this Operators Manual. The information on the model plate is very important if you need help from
your dealer or the MTD customer support department.

• Every tiller has a model plate. You can locate it by standing in the operating position behind the unit
and looking down at the frame on the right side.

• The model plate will look like Figure 2.

This is where your model number will be.

XXX-X-XXX-X-XXX XXXXXXXXXXX

This is where your serial number will be.

Copy the model number here:

MTD PRODUCTS INC

CLEVELAND , OHIO 44136

Copy the serial number here:

Figure 2

SECTION 3: CALLING CUSTOMER SUPPORT

If you are having difficulty assembling this product or if you have any question regarding the controls, operation
or maintenance of this unit, please call the Customer Support Department. You can reach them by calling:

1-800-800-7310

Before you call, make sure that you have your model and serial numbers ready. By having the model and
serial numbers ready, you help the Customer Support Representative give you faster service. To find your
unit’s model and serial number, see SECTION 2: FINDING YOUR MODEL NUMBER.

SECTION 4: UNPACKING
INSTRUCTIONS

1. Remove staples, break glue on top flaps, or cut
tape at carton end and peel along top flap to
open carton.

2. Remove all loose parts included with unit.

3. Cut along dotted lines and lay carton down flat.

4. Remove packing material.

5. Roll or slide unit out of carton. Check carton
thoroughly for loose parts.

6. Extend control cable(s) to the rear of the tiller
and lay them on the floor. Be careful not to
bend or kink control cable(s).

All hardware required for assembly has been placed
in position on the tiller.

SECTION 5: ASSEMBLY
INSTRUCTIONS

IMPORTANT:

GASOLINE or OIL. After assembly, see separate
engine manual for proper fuel and engine oil
recommendations.

NOTE:

operator's position, standing behind the tiller.

Left and right is determined from the

TOOLS REQUIRED FOR ASSEMBLY

(1)-1/2" Wrench or Socket*
(1)-Pair of Pliers
(1)-3/8" Wrench*
*An adjustable wrench may be used.

This owner's guide covers three different model
tillers. Models 340 and 345 have forward tine
drive only. Model 390 has both forward and
reverse tine drive. Follow only the instructions
which pertain to your model tiller. See the model
plate on your tiller for the correct model number.

This unit is shipped WITHOUT

4

A TT ACHING THE T AILPIECE AND DEPTH
ST AKE

Remove the two self-tapping screws on the frame.
Slide the tailpiece into the frame, with the lower hole
in the tailpiece toward the front. Secure with screws
just removed. (See Figure 3.)

Tailpiece

Lower
Hole

Self-Tapping

Screw

Handle

Brace

Spark

Plug

Models 340 & 390

Hex

Lock Nut

Spark

Plug

Model 345

Figure 3

ATTACHING THE HANDLE ASSEMBLY

1. Remove the hex bolt and cupped washer from
the top right side of the frame halves. Hold the
cable guide bracket on the left side of the frame
as it will fall when the bolt is removed. (See
Figure 5.)

2. Insert the handle assembly between the two
frame halves. Insert the hex bolt just removed
through the frame halves, handle assembly,
and into the cable guide bracket (notch in cable
guide bracket goes over the flange on the
frame). Tighten securely.

3. Loosen the hand knob which secures the
handle brace to the handle assembly.

4. Remove the hex lock nut from on top of the
engine, just to the left of the spark plug. Attach
the curved end of the handle brace to the top of
the engine, using hex lock nut just removed.
Tighten securely. (See Figure 4.)

5. Select one of the three handle height positions
(three notches in welded bracket), and tighten
the hand knob to secure the handle in desired
position. Make certain carriage bolt is seated

securely into one of the three positions

provided.

Hex

Lock Nut

Hand Knob

Handle
Hex Bolt

Cupped
Washer

Frame

Half

Figure 4

Handle

Brace

Spark
Plug

Handle

Brace

Hex

Lock Nut

Shoulder

Bolt

5

Figure 5

A TT ACHING THE CLUTCH CONTROL CABLE(S)

FORWARD CABLE

Attach the end of the forward cable to the bracket
underneath the handle assembly as follows. (On
model 390, the forward clutch cable is the cable
which is attached closer to the rear of the tiller).

1. Loosen the hex nut on the threaded rod near
the end of the cable, and move it up the rod as
far as it will go.

2. Unthread the rod from the rest of the cable.
Hook the “Z” end of the rod into the bracket
underneath the handle assembly from the right
hand side. (See Figure 6.)

3. Thread the rod back into the cable until the
cable is straight. Do not tighten it enough to put
any tension on the spring.

4. Thread the hex nut down against the end of
cable. Use a pair of pliers and a wrench to lock
the nut against the rod.

NOTE:

much tension may cause it to break when engaged

Do not overtighten control cable. Too

.

REVERSE CABLE

The reverse clutch cable is the cable which is
attached closer to the front of the tiller. Attach the
end of the reverse cable to the reverse tine drive
clutch lever, above the handle assembly, in the
same manner as you attached the forward cable.
(See Figure 7.)

(Model 390 Only)

FINAL CLUTCH ADJUSTMENT

To check the clutch cable adjustment, proceed as
follows.

1. Disconnect the spark plug wire and move it
away from the spark plug to prevent accidental
starting.

2. Engage and release the tine engagement
handle, then the reverse tine engagement lever
(model 390 only). If an excessive noise is heard
when releasing either the tine drive clutch
handle or lever, the cable may be too loose.
Adjust either the forward or reverse clutch cable
by loosening the hex nut, threading the rod into
the cable one or two turns, then retightening the
nut.

Threaded

Rod

Hex Nut

Reverse

Cable

Threaded

Rod

Hex Nut

Cable

Figure 6 Model 340/345

Reverse Tine

Engagement Handle

“Z” End

Hooked In

Bracket

“Z” End

Hooked In

Bracket

Model 340/345

Tine

Engagement Handle

Figure 8

3. With tine engagement handle in neutral
(released) as shown in Figure 8, pull the starter
rope several times. The tines should not turn.
If they turn forward, loosen the hex nut on the
forward cable (underneath the handle
assembly). See Figure 6. If they turn toward the
rear (model 390 only), loosen the hex nut on the
reverse cable (above the handle assembly).
Unthread the rod from the cable 2 or 3 turns.
Retighten the hex nut, and check again for
correct adjustment. See Figure 8.

Reverse Tine

Engagement Handle

Model 390

Figure 7 Model 390

6

SECTION 6: CONTROLS

THROTTLE CONTROL

The throttle control lever is located on the engine. It
controls the engine speed and stops the engine. (See
Figure 9.)

CHOKE LEVER

The choke lever is located above the throttle control.
It is used to enrich the fuel mixture when starting a
cold engine. (See Figure 9).

PRIMER BUTTON

The primer button is located behind the air cleaner. It
is used to enrich the fuel mixture in the carburetor
when starting a cold engine. (See Figure 9).

(Model 340/390)

(Model 345)

FORWARD TINE ENGAGEMENT HANDLE

The forward tine engagement handle is located
beneath the tiller handle. (See Figure 8). Squeezing
the handle up against the tiller handle engages the
tines. Release the handle to stop the tines.

REVERSE TINE DRIVE CLUTCH LEVER

(Model 390 Only)

The reverse tine drive clutch lever is located on top
of the handle panel. (See Figure 8). Pull the lever to
the rear to move the tines in reverse. Release the
lever to stop the reverse tine drive.

NOTE:

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 engine to stall.

Never engage both the forward and reverse

Choke

Primer

Models 340/390

Throttle Control

Model 345

Fast

Stop

Figure 9

Air

Cleaner

Throttle
Control

DEPTH STAKE

The depth stake controls the tilling depth. Refer to
"HOW TO USE YOUR TILLER" SECTION" at
bottom of this page.

SECTION 7: OPERATION

GAS AND OIL FILL-UP

Service the engine with gasoline and oil as
instructed in the separate engine manual packed
with your tiller. Read instructions carefully.

NOTE:

small amount of oil may be present from the factory.

TO START ENGINE

Model 340/390

1. Attach spark plug wire to spark plug. Make

2. Make certain all controls are in the neutral

Your tiller is shipped without oil; however, a

WARNING:

standing in front of the tiller while the
engine is running or being started.

certain the metal loop on the end of the spark
plug wire (inside the boot) is fastened securely
over the metal tip on the spark plug.

position (released). (See Figure 8).

Be sure no one is

3. Place the throttle control lever in FAST position.
(See Figure 9).

4. Move choke lever to CHOKE position. (A warm
engine requires little or no choke.)

5. Grasp starter handle (See Figure 9) and pull
rope out slowly until engine reaches start of
compression cycle (rope will pull slightly harder
at this point). Let the rope rewind slowly.

6. Pull rope with a rapid, continuous, full arm
stroke. Keep a firm grip on starter handle. Let
rope rewind slowly. Do not let starter handle
snap back against starter.

7. Repeat preceding instructions 5 and 6 until
engine starts. When engine starts, move choke
lever on engine halfway between CHOKE and
RUN.

8. Move throttle control to IDLE position for a few
minutes warm-up. Move choke lever to RUN
position as engine warms up.

7

1.

Model 345

1. Attach spark plug wire to spark plug. Make
certain the metal loop on the end of the spark
plug wire (inside the boot) is fastened securely
over the metal tip on the spark plug.

2. Make certain all controls are in the neutral
position (released). (See Figure 8).

3. Place the engine speed control in the START
position.

4. Push primer two (2) or three (3) times (see
Figure 9). Wait about two (2) seconds between
each push.

NOTE: Primer may be needed to restart a warm

engine after a short shutdown.

5. Stand at side of tiller. Grasp the starter handle
and pull out slowly, until it pulls slightly harder.
Let rope rewind slowly.

6. Pull rope with a rapid full arm stroke. Do not
allow handle to snap back. Allow it to rewind
slowly while keeping a firm hold on the starter
handle.

NOTE: If engine fails to start after three (3) pulls,

push primer two (2) times and pull starter rope again.

7. Repeat steps 4 and 5 until engine starts. Refer
to engine manual for additional engine
information.

NOTE: After starting engine and prior to using the

tiller, be certain to check the clutch adjustment as
described in “Checking the Clutch Adjustment”
section of the Assembly Instructions.

TO STOP ENGINE

1. Move throttle control lever to STOP or OFF
position.

2. Disconnect spark plug wire from spark plug and
ground against the engine to prevent accidental
starting while equipment is unattended.

WHEEL POSITION

The tiller is shipped with the wheels adjusted such
that the unit sits level. While tilling, as the tines
enter the ground and the front of the tiller lowers,
the wheels must be raised to level the unit, which is
essential for proper engine operation. This
adjustment is made by removing the clevis pin and
hairpin clip from wheel yoke, raising the wheels to
the desired height, and replacing the clevis pin and
hairpin clip. (See Figure 10.)

Depth Stake

Wheel

Yoke

Hairpin

Clip and

Clevis Pin

Figure 10

CONTROLLING SPEED AND TILLING
DEPTH

Wheel Yoke Adjustment: Place wheel yoke so

that the wheels are forward (nearest point
between wheels and tines) for shallow tilling,
cultivating and transport. The forward speed will
increase. Turn yoke around (farthest point
between wheels and tines) for deep tilling.
Forward speed will decrease. (See Figure 11.)

HOW T O USE YOUR TILLER

Your tiller is a precision built machine designed for
seed bed preparation, cultivating, furrowing and
mulching. It is engineered to minimize the hardest
work in the vegetable or flower garden, to till the soil
for planting and cultivating, and to perform many
other useful labor saving tasks in the garden. With
the proper amount of care and maintenance, this
machine will provide the owner with many years of
service.

Wheel Yoke in this

position for

deep tilling.

8

Wheel Yoke in this
position for shallow tilling,
cultivating, and transport.

Figure 11

2. Depth Stake Adjustment: 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 10.)

By increasing the depth of the depth stake, the
forward speed of the machine is reduced, and the
working depth is increased. (See Figure 12.) When
the depth stake is raised, the working depth of the
machine is reduced and the forward speed is
increased. The working depth of the machine may
be predetermined by setting the depth stake and
wheels so that the wheels are about four inches
from the ground when the tines and depth stake are
resting on the ground. This setting will permit a
working depth of about four inches. When presetting
the working depth, the handles should be adjusted
so the hand grips are a little above waist height
because the tiller will be lower when the tines and
depth stake penetrate the ground.

Transport
Position

Depth
Stake

Shallow
Tilling
Fast
Forward

Deep Tilling
Slow Forward

Raised Wheel Setting

for Deep Tilling

Figure 12

When tilling, leave approximately 8 inches of
untilled soil between the first and second tilling
paths, then make the third path between the first
and second as shown in Figure 13. 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. In the
latter case, the depth stake should be lowered
before each succeeding pass over the garden.
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.

3.

Figure 13

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.

4. Throttle Control: The throttle control lever
adjusts the engine speed and stops the engine.
With the throttle control lever pushed completely
forward, the carburetor is in START position.
Pulling the throttle control back slightly adjusts
the engine speed to FAST. Pulling the throttle
back further reduces the engine speed to
SLOW. Pull the throttle completely back to stop
the engine.
Use maximum engine speed for deep tilling.
Move the throttle control to SLOW when
transporting the tiller.

TRANSPORTING THE TILLER

To transport the tiller to or from the garden, pivot the
depth stake forward, out of the way. (See Figure

12.) With the throttle control in SLOW position, the

unit will walk freely on top of the lawn. If the
operator does not allow the tiller to move freely, the
unit will start to till the surface.

CULTIVATING

For cultivating, a two to three inch depth is
desirable. Setting the wheels and depth stake so
that the wheels are about two inches above the
ground while the tiller is resting on the tines and
depth stake will allow the machine to work at
cultivating depth. The throttle should be set to
control forward movement to a slow walking speed.

9

With the outer tines installed, the working width of
the machine is 22 or 24 inches. For cultivation, this
may be reduced to 13 inches by removing the outer
tines. Refer to Tine Width Adjustment in Adjustment
section. 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. (See Figure 14.)

SECTION 8: ADJUSTMENTS

WARNING:

plug wire and ground against the
engine before performing any
adjustments, repairs, or maintenance.

TINE WIDTH ADJUSTMENT

The tilling width of the unit is 22 inches. (See Figure

15.) Tilling width can be increased to 24 inches by

removing the clevis pins and hairpin clips, sliding
the outer tines out one inch, and securing in this
position with the clevis pins and hairpin clips. (See
Figure 16.) For cultivation, reduce the tine width to
13 inches by removing the outer tines completely.
(See Figure 17.)

Disconnect the spark

Figure 14

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 hand pickwork
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 causes the soil to hold
moisture longer and allows proper aeration of the
plant root system. This also retards the growth of
weeds.
The U.S. Department of Agriculture and various
state and local agencies offer published booklets
and expert advice on all phases of gardening. They
should be consulted regarding soil information,
planting dates, and the most satisfactory varieties of
crop for your particular area.

22"

Figure 15

24"

Figure 16

13"

Figure 17

WHEEL ADJUSTMENTS

To adjust the wheel yoke and wheel position, refer
to HOW TO USE YOUR TILLER on page 8.

DEPTH STAKE ADJUSTMENT

To adjust the depth stake, refer to HOW TO USE
YOUR TILLER on page 8.

CLUTCH CONTROL ADJUSTMENTS

To adjust the clutch controls, refer to the Final Adjust­ment section of assembly instructions.

10

CARBURETOR ADJUSTMENT

WARNING:

made to the engine while the engine is
running (e.g. carburetor), disengage all
clutches and tines. Keep clear of all
moving parts. Be careful of heated
surfaces and muffler.

Minor carburetor adjustment may be required to
compensate for differences in fuel, temperature,
altitude or load. If adjustments are needed, refer to
the engine manual packed with the tiller.

If any adjustments are

NOTE: A dirty air cleaner will cause engine to run

rough. Be certain air cleaner is clean and attached
to the carburetor before adjusting carburetor. Do not
make unnecessary adjustments. Factory settings
are satisfactory for most applications and conditions.

SECTION 9: LUBRICATION

WARNING: Always stop engine and

disconnect spark plug wire before
cleaning, lubricating or doing any kind
of work on tiller.

Pivot Points-Remove the belt cover and lubricate

all moving parts and pivot points at least once a
season using SAE 30 engine oil.

Chain Drive-The chain case is pre-lubricated and
sealed at the factory.

SECTION 10: MAINTENANCE

WARNING: Disconnect spark plug

wire and ground it against the engine
before performing any repairs or
maintenance.

TROUBLE SHOOTING

Refer to page 13 of this manual for trouble shooting
information.

ENGINE

Refer to the separate engine manual for all
engine maintenance instructions.

Maintain engine oil as instructed in the separate
engine manual packed with your unit. Read and
follow instructions carefully.

Service air cleaner every 25 hours under normal
conditions. Clean every few hours 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.

IMPORTANT: Never run your engine without air

cleaner completely assembled.
The spark plug should be cleaned and the gap
reset once a season. Spark plug replacement is
recommended at the start of each tilling season;
check engine manual for correct plug type and gap
specifications.

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.

CLEANING THE TINE AREA

Clean the underside of the tine shield after each
use. The dirt washes off the tines easier if washed
off immediately instead of after it dries.

BELT REMOVAL AND REPLACEMENT

Your tiller has been engineered with belts made of
special material (Kevlar Tensile). They should not
be replaced with an off-the-shelf belt. If belt
replacement is required, order belt or belts by part
number from your nearest authorized service dealer.

Forward Drive Belt - Part No. 754-0428
Reverse Drive Belt (390 Only) - Part No. 754-0429

Reverse Drive Belt (Model 390 Only)

1. Disconnect and ground the spark plug wire
against the engine. Remove the belt cover from
the left side of the tiller as follows.

2. Remove two self-tapping screws and flat
washers from the front of belt cover. (See
Figure 18.)

3. Remove the hex stop nut and flat washer from
the side of the belt cover. Remove belt cover.

Self-Tapping

Screws

4. Lift the belt off the transmission pulley.

5. Remove the hex nut which secures the reverse
idler pulley to the idler bracket. Slide idler pulley
out and remove the belt. (See Figure 19.)

Hex Nut and Washer

Belt

Cover

Figure 18

11

Reverse Idler Pulley

Hex Nut

Forward

Belt

6. Reassemble the new belt, following instructions
in reverse order. Make certain the reverse drive
belt is assembled with the wide side of the belt
against the transmission and engine pulleys. Be
certain to adjust the clutch control as instructed
in the final clutch adjustment section of
assembly instructions

.

Reverse

Idler

Pulley

Engine

Pulley

Reverse Belt

Figure 19 Model 390 Shown

Engine

Pulley

Forward

Belt

Transmission
Pulley

Transmission

Pulley

Forward Drive Belt (See Figure 19)

1. Model 340: Remove the belt cover by following
step 1and step 2 of the previous section.
Model 390: Remove the reverse drive belt as
instructed in the previous section.

2. Remove the belt keeper from the idler pulley by
removing the idler pulley nut.

3. Lift belt off the idler pulley and transmission
pulley. See Figure 20.

4. Using a 9/16" wrench, remove bolt from engine
pulley.

5. Push reverse idler pulley bracket forward, and
remove engine pulley and belt. See Figure 20.

6. Reassemble the new belt, following instructions
in reverse order. Make certain the forward drive
belt is assembled with the wide side of the belt
away from the transmission and engine pulleys.
Be certain to adjust the clutch control as
instructed in the final clutch adjustment section
of assembly instructions.

Idler

Pulley

Nut

Figure 20 Model 390 Shown

SECTION 11: OFF-SEASON STORAGE

If the tiller is to be inoperative for a period longer
than 30 days, the following precautions are
recommended.

1. Working outdoors, drain all fuel from the fuel
tank. Run the engine until it stops from lack of
fuel.

WARNING: Do not drain fuel while

smoking, or if near an open fire.

2. Drain all the oil from the crankcase (this should
be done after the engine has been operated
and is still warm) and refill the crankcase with
fresh oil.

12

3. Protect the inside of the engine for storage as
instructed in the separate engine manual
packed with your tiller.

4. Clean the engine and the entire tiller thoroughly.

5. Wipe tines with oiled rag to prevent rust.

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, especially
any springs, bearings and cables.

6. Store in a clean, dry area. Do not store next to
corrosive materials, such as fertilizer.

SECTION 12: TROUBLE SHOOTING GUIDE

Trouble Possible Cause(s) Corrective Action

Engine fails to
start

Engine runs
erratic

Engine over­heats

Tines do not
engage

Fuel tank empty, or stale fuel.
Throttle control lever not in correct

starting position (if so equipped).
Blocked fuel line.
Dirty aircleaner.
Choke not in ON position.
Spark plug wire disconnected.
Faulty spark plug.
Engine flooded.
Unit running on CHOKE.
Spark plug wire loose.
Blocked fuel line or stale fuel.

Vent in gas cap plugged.
Water or dirt in fuel system.
Dirty air cleaner.
Carburetor out of adjustment.
Engine oil level low.
Dirty air cleaner.
Air flow restricted.
Carburetor not adjusted properly.
Foreign object lodged in tines.
Tine clevis pin(s) missing.
Pulley and idler not in correct
adjustment.
Control cable not adjusted properly.
Belt worn and/or stretched.

Fill tank with clean, fresh gasoline. Fuel will not last over
thirty days unless a fuel stabilizer is used.
Move throttle lever to start position.

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.
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.
Fill crankcase with proper oil.
Refer to the engine manual packed with your unit.
Refer to the engine manual packed with your unit.
Adjust carburetor as instructed in separate engine manual.
Dislodge foreign object.
Replace tine clevis pin(s).
Take unit to authorized service dealer.

Adjust control cable (see assembly instructions).
Replace belt.

Note: For repairs beyond the minor adjustments above, contact your local authorized service dealer.

13

Model 340-345

14

Model 340-345

REF.

NO. PART NO.

2 712-3004A Hex Flange L-Nut 5/16-18
3 786-0004 Tail Piece Brkt. (R.H.)

4 786-0003 Tail Piece Brkt. (L.H.)
5 710-0805 Hex Bolt 5/16-18 x 1.5" Lg.
7 750-0890 Spacer .32" I.D. x .75" O.D.
8 786-0005 Depth Bar

9 711-0415 Clevis Pin .375" I.D. x 1.62" Lg.
10 714-0149B Internal Cotter Pin
11 750-0470 Spacer .326" I.D. x .47" O.D.
13 710-0176 Hex Bolt 5/16-18 x 2.75" Lg.
14 786-0138 Frame—R.H.
15 786-0139 Frame—L.H.
16 686-0081A N Wheel Hanger Brkt. Ass’y.
18 738-0929 Shld. Bolt .496" Dia. x 1.45"
19 734-1781 Wheel Ass’y.
22 731-1599 Handle Cover
23 711-1036 Spec. Hex Nut
24 786-0129 Cable Guide Brkt.
25 736-0119 L-Wash. 5/16" I.D.*
26 736-3020 Fl-Wash. .266" I.D. x .625" O.D.
27 712-0442 Hex L-Stop Nut 1/4-20 Thd.
28 712-0287 Hex Nut 1/4-20 Thd.

CODE

Thd. (Gr. 5)

DESCRIPTION

REF.

NO. PART NO.

29 720-0274 Grip—Handle
31 736-0140 Fl-Wash. .385" I.D. x .62" O.D.
35 731-1645A Clutch Handle Holder
36 720-0269 Grip—Clutch
38 686-0083 Clutch Handle Ass’y.
39 710-0189 Hex Bolt 5/16-18 x 3" Lg.*
40 649-0022A N Longhorn Handle Ass’y.
42 746-0918 Clutch Control Cable
43 710-1236 Carr. Bolt 5/16-18 x 1" Lg. (Special)
45 736-0242 Wash. Bell. .340" ID x .872" OD
46 720-0195 Hand Knob
47 749-0915A Engine Tubing Brace (340)

749-1082 Engine Tubing Brace (345)
48 712-0429 Hex L-Nut 5/16-18 Thd.
49 736-0242 Bell-Wash. .345" I.D. x .88" O.D.
50 710-3008 Hex Bolt 5/16-18 x.75" Lg
51 710-0641 Hex Bolt 1/4-20 x 2.25" Lg.
52 738-0934 Shld. Bolt
53 710-0604 Hex Wash. Hd. TT -Tap Scr. 5/16-18

54 710-0602 Hex Wash. Hd. TT -Tap Scr. 5/16-18
55 786-0159 Engine Brkt. (340)

For faster service obtain standard nuts, bolts and washers locally. If these
items cannot be obtained locally, order by part number and size as shown
on parts list.

CODE

x .62" Lg.
x 1" Lg.

DESCRIPTION

15

Model 340-345

16

Model 340-345

REF.

NO.

1 786-0056 Belt Cover
2 736-3020 Fl-Wash. .266" I.D. x .625" O.D.
3 710-0599 Hex Wash. Hd. TT-Tap Scr. 1/4-20

4 712-0392 Hex L-Stop Nut 1/4-28 Thd.
5 712-3004A Hex Flange Top L-Nut 5/16-18 Thd.
6 786-0035A Tine Shield
7 710-0118 Hex Bolt 5/16-18 x .75" Lg.*

8 711-0919 Belt Cover Bolt
10 736-0171 L-Wash. 7/16" I.D.
11 710-0502A Hex Wash. Hd. TT-Tap Scr.

14 — Engine
16 711-0415 Clevis Pin .375" Dia. x 1.62" Lg.
17 714-0149B Internal Cotter Pin
18 642-0005 Outer Tine Ass’y.—L.H.

19 642-0003 Inner Tine Ass’y.—L.H.

20 686-0091 Chain Case Ass’y. Comp.
21 736-0119 L-Wash. 5/16" I.D.*

22 710-0107 Hex Bolt 5/16-24 x .5" Lg.
24 710-0191 Hex Bolt 3/8-24 x 1.25" Lg.

PART

NO. CODE DESCRIPTION

x .5" Lg.

3/8-16 x 1.25" Lg.

642-0004 Outer Tine Ass’y.—R.H.

(Not Shown)

642-0002 Inner Tine Ass’y.—R.H.

(Not Shown)
(Available Only as Comp. Ass’y.)

REF.

NO.

26 756-0972 Outer Engine Pulley Half
27 756-0971 Inner Engine Pulley Half
28 756-0585 Fl-Pulley 6" Dia.
30 754-0428 “V”-Belt
31 748-0350 Pulley Mounting Adapter
32 736-0112 Bell-Wash. .535" I.D. x 1.5" O.D.
33 712-3029 Hex Jam Nut 1/2-20 Thd. (Gr. 5)
34 738-0930 Shld. Bolt 5/16-18 Thd.
35 786-0039 Belt Cover Brkt.
39 710-0723 Hex Cap Bolt 3/8-16 x 1.25" Lg.
40 712-0266 Hex Cent. Jam Nut 3/8-16 Thd.
41 750-0892 Spacer .64" I.D. x 2.4" Lg.
42 786-0144 Tine Idler Brkt.
43 756-0313 Fl-Idler
44 710-0783 Hex Self-Tap Scr. #8-32 x .38"Lg.
45 751-0233 Muffler Deflector
46 746-0918 Clutch Control Cable
48 735-0639 Spark Plug Boot (Optional)
50 736-0169 L-Wash. 3/8" I.D.*
51 736-0258 Fl-Wash. 3/8" I.D. x 1" O.D.
52 786-0145A Engine Plate
53 786-0053 Tine Shield Support
54 712-0240 Hex Nut 7/16-20 Thd.
56 736-0312 Bearing Retainer Washer
57 786-0149 Belt Keeper

PART

NO. CODE DESCRIPTION

For faster service obtain standard nuts, bolts and washers locally. If these
items cannot be obtained locally, order by part number and size as shown
on parts list.

17

Model 390

18

Model 390

REF.

NO.

10 714-0149B Internal Cotter Pin
11 750-0470 Spacer .326" I.D. x .47" O.D.
13 710-0176 Hex Bolt 5/16-18 x 2.75" Lg.
14 786-0138 Frame–R.H.
15 786-0139 Frame–L.H.
16 686-0081A N Wheel Hanger Brkt. Ass’y.
18 738-0929 Shld. Bolt 3/8-16 Thd.
19 734-1566 Wheel Ass’y. 8" x 1.75"
22 731-1600 Handle Cover w/Reverse
23 711-1036 Spec. Hex Nut
24 786-0129 Cable Guide Brkt.
25 736-0119 L-Wash. 5/16" I.D.*
26 736-3020 Fl-Wash. .266" I.D. x .625" O.D.
27 712-0442 Hex L-Stop Nut 1/4-20 Thd.
28 712-0287 Hex Nut 1/4-20 Thd.*
29 720-0274 Grip–Handle
30 736-0264 Fl-Wash. .344" I.D. x .62" O.D.
32 720-0270A N Grip–Reverse Lever

PART NO. CODE DESCRIPTION

2 712-3004A Hex Flange L-Nut 5/16-18 Thd.

(Gr. 5)
3 786-0004 Tail Piece Brkt. (R.H.)
4 786-0003 Tail Piece Brkt. (L.H.)
5 710-0805 Hex Bolt 5/16-18 x 1.5" Lg.
7 750-0890 Spacer .32" I.D. x .75" O.D.
8 786-0005 Depth Bar
9 711-0415 Clevis Pin .375" I.D. x 1.62" Lg.

REF.

NO.

33 686-0014A N Reverse Handle Ass’y.
34 726-0135 Cap Speed Nut
35 731-1645A Clutch Handle Holder
36 720-0269 Grip–Clutch
38 686-0083 Clutch Handle Ass’y.
39 710-0189 Hex Bolt 5/16-18 x 3" Lg.
40 649-0022A N Longhorn Handle Ass’y.
41 746-0953 N Clutch Control Cable–Reverse
42 746-0918 Clutch Control Cable–Forward
43 710-1236 Carr. Bolt 5/16-18 x 1" Lg.

45 736-0242 Wash. Bell. .340" ID x .872" OD
46 720-0195 Hand Knob
47 749-0915A Engine T ubing Brace
48 712-0429 Hex Nyloc Nut 5/16-18 Thd.
49 736-0242 Bell-Wash. .345" I.D. x .88" O.D.
50 710-3008 Hex Bolt 5/16-18 x .75" Lg.

51 710-0641 Hex Bolt 1/4-20 x 2.25" Lg.
52 738-0934 Shld. Bolt
53 710-0604 Hex Wash. Hd. TT-Tap Scr.

54 710-0602 Hex Wash Hd. TT-Tap Scr. 5/16-18
56 710-0779A Truss Mach. Scr. #10 x 1/2" Lg.

57 786-0159 Engine Bracket

PART NO. CODE DESCRIPTION

(Special)

(Gr. 5)

5/16-18 x .62" Lg.
x 1" Lg.

For faster service obtain standard nuts, bolts and washers locally. If these
items cannot be obtained locally, order by part number and size as shown
on parts list.

19

Model 390

20

Model 390

REF.

NO.

1 786-0057 Belt Cover
2 736-3020 Fl-Wash. .266" I.D. x .625" O.D.
3 710-0599 Hex Wash. Hd. TT-Tap Scr.

4 712-0392 Hex L-Stop Nut 1/4-28 Thd.
5 712-3004A Hex Flange Top L-Nut 5/16-18

6 786-0035A Tine Shield
7 710-0118 Hex Bolt 5/16-18 x .75" Lg.*

8 711-0920 Belt Cover Bolt
10 736-0171 L-Wash. 7/16" I.D.
11 710-0502A Hex L-Wash. TT-Tap Scr.

14 — Engine
16 711-0415 Clevis Pin .375" Dia. x 1.62" Lg.
17 714-0149B Internal Cotter Pin
18 642-0005 Outer Tine Ass’y.–L.H.

19 642-0003 Inner Tine Ass’y.–L.H.

20 686-0091 Chain Case Ass’y. Comp.
21 736-0119 L-Wash. 5/16" I.D.*

22 710-0107 Hex Bolt 5/16-24 x .5" Lg.
23 732-0697 Return Spring 2.7" Lg.
24 710-0191 Hex Bolt 3/8-24 x 1.25" Lg.
25 736-0452 Bell-Wash. .396" I.D. x 1.14" O.D.

PART

NO. CODE

1/4-20 x .5" Lg.

Thd. (Gr. 5)

3/8-16 x 1.25" Lg.

642-0004 Outer Tine Ass’y.–R.H.

(Not Shown)

642-0002 Inner Tine Ass’y.–R.H. (Not

Shown)
(Available Only as Comp.Ass’y.)

DESCRIPTION

REF.

NO.

26 756-0600 Outer Engine Pulley Half
27 756-0971 Inner Engine Pulley Half
28 756-0585 Fl-Pulley 6" Dia.
29 754-0429 “V”-Belt (Reverse)
30 754-0428 “V”-Belt (Forward)
31 748-0350 Pulley Mounting Adapter
32 736-0112 Bell-Wash. .535" I.D. x 1.5" O.D.
33 712-3029 Hex Jam Nut 1/2-20 Thd. (Gr. 5)
34 738-0930 Shld. Bolt 5/16-18 Thd.
35 786-0040 Reverse Mounting Brkt.
36 686-0013 Reverse Arm Ass’y.
37 786-0041 Keeper Plate
38 756-0313 Fl-Idler 2.12" O.D.
39 710-0723 Hex Cap Bolt 3/8-16 x 1.25" Lg.
40 712-0266 Hex Cent. Jam Nut 3/8-16 Thd.
41 750-0892 Spacer .64" I.D. x 2.4" Lg.
42 786-0144 Tine Idler Brkt. Ass’y.
43 756-0313 Fl-Idler 2.12" O.D.
44 710-0783 Hex Self-Tap Scr.

45 751-0233 Muffler Deflector
46 746-0918 Clutch Control Cable–Forward
47 746-0953 N Clutch Control Cable–Reverse
48 735-0639 Spark Plug Boot (Optional)
52 786-0145A N Engine Plate
53 786-0053 Tine Shield Support
54 712-0240 Hex Nut 7/16-20 Thd.
56 786-0149 Belt Keeper

PART

NO. CODE

DESCRIPTION

#8-32 x .38" Lg.

For faster service obtain standard nuts, bolts and washers locally. If these
items cannot be obtained locally, order by part number and size as shown
on parts list.

21

NOTES

22

NOTES

23

MANUFACTURER’S LIMITED WARRANTY FOR:

For TWO YEARS from the date of retail purchase
within the United States of America, its possessions
and territories, MTD PRODUCTS INC will, at its
option, repair or replace, for the original purchaser,
free of charge, any part or parts found to be
defective in material or workmanship. This warranty
covers units which have been operated and
maintained in accordance with the operating
instructions furnished with the unit, and which have
not been subject to misuse, abuse, commercial use,
neglect, accident, improper maintenance or
alteration.

Normal wear parts or components thereof are
subject to separate terms as noted below in the “No
Fault Ninety Day Consumer Warranty” clause.

All normal wear part failures will be covered on this
product for a period of 90 days regardless of cause.
After 90 days, but within the two year period, normal
wear parts failures will be covered ONLY IF caused
by defects in material or workmanship of OTHER
component parts. Normal wear parts are defined as
batteries*, belts, blades, blade adapters, grass
bags, rider deck wheels, seats, snow thrower skid
shoes, shave plates 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, please check the yellow pages or contact
the Customer Service Department of MTD
PRODUCTS INC, P. O. Box 368022, Cleveland,
Ohio 44136-9722. Phone [phone]. The
return of a complete unit will not be accepted by the
factory unless prior written permission has been
extended by the Customer Service Department of
MTD PRODUCTS INC.

Transportation charges: Transportation charges
for the movement of any power equipment unit or
attachment are the responsibility of the purchaser.

Units exported out of the United States: MTD
PRODUCTS INC 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 PRODUCTS INC’s
authorized channels of export distribution.

Other Warranties:

1. The engine or component parts thereof carry
separate warranties from their manufacturers.
Please refer to the applicable manufacturer’s
warranty on these items.

2. *Batteries are covered by a 90-day replacement
warranty.

3. Log splitter pumps, valves and cylinders or
component parts thereof are covered by a one
year warranty.

4. All other warranties, express or implied,
including any implied warranty of
merchantability or fitness for a particular
purpose, are hereby expressly disclaimed in
their entirety.

5. The provisions as set forth in this warranty
provide the sole and exclusive remedy of MTD
PRODUCTS INC’s obligations arising from the
sales of its products. MTD PRODUCTS INC will
not be liable for incidental or consequential loss
or damage.

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. Certain disclaimers are not allowed in
some states and therefore they may not apply to
you under all circumstances.

NOTE: This warranty does not cover routine
maintenance items such as lubricants, filters, blade
sharpening and tune-ups, or adjustments such as
brake adjustments, clutch adjustments or deck
adjustments. Nor does this warranty cover normal
deterioration of the exterior finish due to use or
exposure.