Sears Craftsman 944.621554 User manual

Important:
Read and follow
all Safety Rules
and Instructions
Before Operating
This Equipment
MODEL NO.
944.621554
OWNER’S
MANUAL
• Assembly
• Operation
• Maintenance
• Service and Adjustments
• Repair Parts
6.0 HP
26 INCH TINE WIDTH
FRONT TINE TILLER
WITH REVERSE
Sears Canada, Inc., Toronto, Ontario M5B 2B8

2
• Do not run the engine indoors; exhaust fumes are
dangerous.
• Never operate the tiller without proper guards, plates,
or other safety protective devices in place.
• Keep children and pets away.
• Do not overload the machine capacity by attempting
to till too deep at too fast a rate.
• Never operate the machine at high speeds on slippery
surfaces. Look behind and use care when backing.
• Never allow bystanders near the unit.
• Use only attachments and accessories approved by
the manufacturer of the tiller.
• Never operate the tiller without good visibility or light.
• 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 handlebars and do not restrain the
machine.
MAINTENANCE AND STORAGE
• Keep machine, attachments, and accessories in safe
working condition.
• Check shear pins, engine mounting bolts, and other
bolts at frequent intervals for proper tightness to be
sure the equipment is in safe working condition.
• Never store the machine with fuel in the fuel tank inside
a building where ignition sources are present, such
as hot water and space heaters, clothes dryers, and
the like. Allow the engine to cool before storing in any
enclosure.
• Always refer to the operator’s guide instructions for
important details if the tiller is to be stored for an ex-
tended period.
- IMPORTANT -
CAUTIONS, IMPORTANTS, AND NOTES ARE A MEANS OF
ATTRACTING ATTENTION TO IMPORTANT OR CRITICAL
INFORMATION IN THIS MANUAL.
IMPORTANT: USED TO ALERT YOU THAT THERE IS A
POSSIBILITY OF DAMAGING THIS EQUIPMENT.
NOTE: Gives essential information that will aid you to
better understand, incorporate, or execute a particular set
of instructions.
Look for this symbol to point out im-
portant safety precautions. It means
CAUTION!!! BECOME ALERT!!! YOUR
SAFETY IS INVOLVED.
CAUTION: Always disconnect spark
plug wire and place wire where it can-
not contact spark plug in order to pre-
vent accidental starting when setting
up, transporting, adjusting or making
repairs.
TRAINING
• Read the Owner’s Manual carefully. Be thoroughly
familiar with the controls and the proper use of the
equipment. Know how to stop the unit and disengage
the controls quickly.
• Never allow children to operate the equipment. Never
allow adults to operate the equipment without proper
instruction.
• Keep the area of operation clear of all persons, par-
ticularly small children, and pets.
PREPARATION
• Thoroughly inspect the area where the equipment is
to be used and remove all foreign objects.
• Disengage all clutches and shift into neutral before
starting the engine (motor).
• Do not operate the equipment without wearing ade-
quate outer garments.Wear footwear that will improve
footing on slippery surfaces.
• Handle fuel with care; it is highly flammable.
• Use an approved fuel container.
• Never add fuel to a running engine or hot engine.
• Fill fuel tank outdoors with extreme care. Never fill fuel
tank indoors.
• Replace gasoline cap securely and clean up spilled
fuel before restarting.
• Use extension cords and receptacles as specified by
the manufacturer for all units with electric drive motors
or electric starting motors.
• Never attempt to make any adjustments while the
engine (motor) is running (except where specifically
recommended by manufacturer).
OPERATION
• Do not put hands or feet near or under rotating parts.
• Exercise extreme caution when operating on or cross-
ing gravel drives, walks, or roads. Stay alert for hidden
hazards or traffic. Do not carry passengers.
• After striking a foreign object, stop the engine (motor),
remove the wire from the spark plug, thoroughly inspect
the tiller for any damage, and repair the damage before
restarting and operating the tiller.
• Exercise caution to avoid slipping or falling.
• If the unit should start to vibrate abnormally, stop the
engine (motor) and check immediately for the cause.
Vibration is generally a warning of trouble.
• Stop the engine (motor) when leaving the operating
position.
• Takeall possible precautions when leaving the machine
unattended. Disengage the tines, shift into neutral, and
stop the engine.
• Before cleaning, repairing, or inspecting, shut off the
engine and make certain all moving parts have stopped.
Disconnect the spark plug wire, and keep the wire away
from the plug to prevent accidental starting.Disconnect
the cord on electric motors.
SAFETY RULES
Safe Operation Practices for Walk-Behind Powered Rotary Tillers

3
PRODUCT SPECIFICATIONS
GASOLINE CAPACITY: 3 Quarts (2.8L)
Unleaded Regular
OIL (API-SG-SL): SAE 30 (Above 32°F/0°C)
(Capacity: 21 oz./0.6L) SAE 5w-30 (Below 32°F/0°C)
SPARK PLUG : Champion
(GAP: .030"/0.76mm) RC12YC
TABLE OF CONTENTS
SAFETY RULES ............................................................ 2
CUSTOMER RESPONSIBILITIES................................. 3
PRODUCT SPECIFICATIONS ....................................... 3
WARRANTY................................................................... 3
ASSEMBLY ................................................................. 4-5
OPERATION ............................................................... 6-9
MAINTENANCE SCHEDULE ...................................... 10
MAINTENANCE ...................................................... 10-12
SERVICE & ADJUSTMENTS ................................. 13-15
STORAGE .................................................................... 16
TROUBLESHOOTING ................................................. 17
REPAIR PARTS-TILLER......................................... 18-23
REPAIR PARTS-ENGINE........................................ 24-29
PARTS ORDER/SERVICE ....................... BACK COVER
CUSTOMER RESPONSIBILITIES
• Read and observe the safety rules.
• Follow a regular schedule in maintaining, caring for
and using your tiller.
• Follow the instructions under the “Maintenance” and
“Storage” sections of this Owner’s Manual.
CONGRATULATIONS on your purchase of a SearsTiller.It
has been designed, engineered and manufactured to give
you the best possible dependability and performance.
Should you experience any problems you cannot easily
remedy, please contact your nearest authorized service
center/department. They have competent, well-trained
technicians and the proper tools to service or repair this
unit.
Please read and retain this manual. The instructions will
enable you to assemble and maintain your tiller properly.
Always observe the “SAFETY RULES”.
IMPORTANT: 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. SEE
YOUR SEARS AUTHORIZED SERVICECENTER/DEPARTMENT
FOR SPARK ARRESTER. REFER TO THE REPAIR PARTS
SECTION OF THIS MANUAL FOR PART NUMBER.
LIMITED TWO (2) YEAR WARRANTY ON CRAFTSMAN TILLER
For Two (2) years from date of purchase Sears Canada, Inc. will repair or replace at Sears option free of charge parts which are
defective as a result of material or workmanship.
COMMERCIAL OR RENTAL USE:
Warranty on Tiller will be thirty (30) days from date of purchase if used for commercial or rental purposes.
This Warranty does NOT cover:
1. Pre-delivery set-up.
2. Expendable items which become worn during normal use, such as tines, spark plugs, air cleaners, shear pins, and
belts.
3. Repairs necessary because of operator abuse or negligence, including the failure to operate and maintain the
equipment according to the instructions contained in the Owner’s Manual.
Warranty service is available by returning the Craftsman Tiller to the nearest Sears Service Centre/Department in Canada. This
warranty applies only while this product is in use in Canada.
This warranty is in addition to any statutory warranty and does not exclude or limit legal rights you may have but shall run concur-
rently with applicable provincial legislation. Furthermore, some provinces do NOT allow limitation on how long an implied warranty
will last so the above limitations may not apply to you.
SEARS CANADA, INC., TORONTO, ONTARIO M5B 2B8

4
ASSEMBLY
OPERATOR’S POSITION (See Fig. 1)
When right or left hand is mentioned in this manual, it
means when you are in the operating position (standing
behind tiller handles).
TOOLS REQUIRED FOR ASSEMBLY
A socket wrench set will make assembly easier. Standard
wrench sizes are listed.
(1) Utility knife
(1) Screwdriver
(1) Pair of pliers
(2) 1/2" wrenches
overhead_views_7
FRONT
LEFT RIGHT
OPERATOR’S
POSITION
FIG. 1
Your new tiller has been assembled at the factory with exception of those parts left unassembled for shipping purposes.
To ensure safe and proper operation of your tiller all parts and hardware you assemble must be tightened securely. Use
the correct tools as necessary to insure proper tightness.
(2) Flange Locknuts
5/16-18 UNC
(2) Lock Washers 5/16
(2) Hex Nuts 5/16-18
(2) Hex Bolts 5/16-18 x 1-1/4
(2) Carriage Bolts 5/16-18 UNC x 2-1/2
CONTENTS OF HARDWARE PACK
(1) Manual
(1) Bottle Engine Oil

5
ASSEMBLY
FIG. 2
FIG. 3
UNPACK CARTON & INSTALL HANDLE
(See Fig. 2)
CAUTION:Be careful of exposed staples
when handling or disposing of carton-
ing material.
IMPORTANT:WHEN UNPACKING AND ASSEMBLING TILLER,
BE CAREFUL NOT TO STRETCH OR KINK CABLE(S).
• Cut cable ties securing handle column.
• Route cable(s) as shown and slide handle column onto
handle mount.
• Remove all packing from carton.
• Secure handle column using two (2) carriage bolts and
two (2) flange locknuts. Tighten securely.
• Cut away carton.
• Route tine control cable(s) through plastic cable clip
on handle mount.
NOTE: Cables must not touch the muffler.
• Cut cable ties securing tiller to skid. Remove tiller from
skid by pulling backwards.
• Remove screws securing depth stake to skid and dis-
card the screws.
TINE
CONTROL
CABLES
TINE
CONTROL
HANDLE
MOUNT
HANDLE
COLUMN
INSTALL DEPTH STAKE ASSEMBLY
(See Fig. 3)
•Loosen nut “A”.
• Insert stake support between engine bracket halves
with stake spring down.
• Bolt stake support to engine brackets with bolts, lock
washers and nuts. Tighten securely. Tighten nut “A”.
• Depth stake must move freely. If it does not, loosen
support bolt.
depth_stake_4
DEPTH
STAKE
SUPPORT
BOLT
HEX BOLTS,
LOCK WASHERS,
AND HEX NUTS
DEPTH STAKE
SUPPORT
NUT “A”
ENGINE BRACKET
HALVES
STAKE
SPRING
HANDLE HEIGHT
• Handle height may be adjusted to better suit operator.
(See “HANDLE HEIGHT” in the Service and Adjust-
ments section of this manual).
TILLING WIDTH
• Tilling width may be adjusted to better handle your
tilling conditions (See “TINE ARRANGEMENT” in the
Service and Adjustments section of this manual).
TINE OPERATION
• Check tine operation before first use. (See “TINE OP-
ERATION CHECK” in the Service and Adjustments
section of this manual).
FLANGE
LOCKNUT
CARRIAGE
BOLT

6
KNOW YOUR TILLER
READ THIS OWNER'S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR TILLER.
Compare the illustrations with your tiller to familiarize yourself with the location of various controls and adjustments. Save
this manual for future reference.
FIG. 4
MEETS ANSI SAFETY REQUIREMENTS
Our tillers conform to the safety standards of the American National Standards Institute.
FORWARD TINE CONTROL - Engages tines in forward
direction.
REVERSE TINE CONTROL - Engages tines in reverse
direction.
CHOKE CONTROL - Used when starting a cold engine.
THROTTLE CONTROL - Controls engine speed.
DEPTH STAKE - Controls forward speed and the depth at
which the tiller will dig.
RECOIL STARTER HANDLE - Used to start the engine.
FORWARD TINE CONTROL
REVERSE TINE CONTROL
DEPTH STAKE
CHOKE CONTROL
TINES
TINE SHIELD
THROTTLE
CONTROL
RECOIL STARTER HANDLE
These symbols may appear on your Tiller or in literature supplied with the product. Learn and understand their
meaning.
OPERATION

7
OPERATION
depth_stake_4
FIG. 6
DEPTH
STAKE
HAIRPIN CLIP
AND CLEVIS PIN
STAKE
SPRING
WHEEL
FORWARD TINE CONTROL
“ON” (DOWN) POSITION
handles_93
FIG. 5
engine_art_71
CHOKE
CONTROL
THROTTLE
CONTROL
FORWARD TINE CONTROL
“OFF” (UP) POSITION
REVERSE TINE CONTROL
00155
HOW TO USE YOUR TILLER
Know how to operate all controls before adding fuel and
oil or attempting to start engine.
The operation of any tiller can result in foreign objects thrown into the eyes, which can result
in severe eye damage. Always wear safety glasses or eye shields before starting your til-
ler and while tilling. We recommend a wide vision safety mask over spectacles or standard
safety glasses.
STOPPING (See Fig. 5)
TINES
• Release forward tine control to stop forward move-
ment.
• Release reverse tine control to stop reverse move-
ment.
ENGINE
• Move throttle control to “STOP” position.
• Never use choke to stop engine.
TINE OPERATION (See Fig. 5)
FORWARD
• Squeeze forward tine control to handle.
REVERSE
• With forward tine control “OFF” (up) position, pull back
and hold reverse tine control.
TILLING
The speed and depth of tilling is regulated by the position
of the depth stake and wheel height.
The depth stake should always be below the wheels for
digging. It serves as a brake to slow the tiller’s forward
motion to enable the tines to penetrate the ground. Also,
the more the depth stake is lowered into the ground the
deeper the tines will dig.
DEPTH STAKE (See Fig. 6)
Adjust depth stake by removing the hairpin clip and clevis
pin. Change depth stake to desired position. Replace the
clevis pin and hairpin clip.
• For normal tilling, set depth stake at the second or third
hole from the top.
WHEELS (See Fig. 6)
Adjust wheels by removing the hairpin clip and clevis pin.
Change wheel position. Replace the hairpin clip and clevis
pin.
• For normal tilling, set wheels at the second or third
hole from the top.

8
OPERATION
engine_art_4
OIL
FILLER
PLUG
OIL
LEVEL
FIG. 7
TO TRANSPORT
CAUTION: Before lifting or transporting,
allow tiller engine and muffler to cool.
Disconnect spark plug wire. Drain
gasoline from fuel tank.
AROUND THE YARD
• Tip depth stake forward until it is held by the stake
spring.
• Push tiller handles down, raising tines off the ground.
• Push or pull tiller to desired location.
AROUND TOWN
• Disconnect spark plug wire.
• Drain fuel tank.
• Transport in upright position to prevent oil leakage.
BEFORE STARTING ENGINE
IMPORTANT: BE VERY CAREFUL NOT TO ALLOW DIRT
TO ENTER THE ENGINE WHEN CHECKING OR ADDING
OIL OR FUEL. USE CLEAN OIL AND FUEL AND STORE IN
APPROVED, CLEAN, COVERED CONTAINERS. USE CLEAN
FILL FUNNELS.
FILL ENGINE WITH OIL (See Fig. 7)
• With engine level, remove engine oil filler plug.
• Fill engine with oil to point of overflowing. For approx-
imate capacity see “PRODUCT SPECIFICATIONS” on
page 3 of this manual.
• Tilt tiller back on its wheels and then re-level.
• With engine level, refill to point of overflowing if nec-
essary. Replace oil filler plug.
• For cold weather operation you should change oil for
easier starting (See “OIL VISCOSITY CHART” in the
Maintenance section of this manual).
• To change engine oil, see the Maintenance section of
this manual.
ADD GASOLINE
• Fill fuel tank to bottom of filler neck. Do not overfill.
Use fresh, clean, regular unleaded gasoline with a
minimum of 87 octane. (Use of leaded gasoline will
increase carbon and lead oxide deposits and reduce
valve life). Do not mix oil with gasoline. Purchase fuel
in quantities that can be used within 30 days to assure
fuel freshness.
CAUTION: Fill to within 1/2 inch of top
of fuel tank to prevent spills and to allow
for fuel expansion. If gasoline is ac-
cidentally spilled, move machine away
from area of spill. Avoid creating any
source of ignition until gasoline vapors
have disappeared.
Wipe off any spilled oil or fuel. Do not
store, spill or use gasoline near an
open flame.
IMPORTANT: WHEN OPERATING IN TEMPERATURES
BELOW32°F(0°C), USE FRESH, CLEAN WINTER GRADE
GASOLINE TO HELP INSURE GOOD COLD WEATHER
STARTING.
CAUTION: Alcohol blended fuels (called
gasohol or using ethanol or methanol) can at-
tract moisture which leads to separation and
formation of acids during storage. Acidic gas
can damage the fuel system of an engine while
in storage. To avoid engine problems, the fuel
system should be emptied before storage of
30 days or longer. Drain the gas tank, start
the engine and let it run until the fuel lines
and carburetor are empty. Use fresh fuel next
season. See Storage Instructions for additional
information. Never use engine or carburetor
cleaner products in the fuel tank or permanent
damage may occur.
TO START ENGINE (See Fig. 8)
CAUTION: Keep tine control in “OFF”
position when starting engine.
When starting engine for the first time or if engine has run
out of fuel, it will take extra pulls of the recoil starter to
move fuel from the tank to the engine.
• Make sure spark plug wire is properly connected.
• Place throttle control in “FAST” position.
• Move choke control to full “CHOKE” position. Grasp
recoil starter handle with one hand and grasp tiller
handle with other hand. Pull rope out slowly until en-
gine reaches start of compression cycle (rope will pull
slightly harder at this point).
• Pull recoil starter handle quickly. Do not let starter
handle snap back against starter. Repeat if neces-
sary.
• If engine fires but does not start, move choke control
to half choke position. Pull recoil starter handle until
engine starts.
• When engine starts, slowly move choke control to
“RUN” position as engine warms up.
NOTE: A warm engine requires less choking to start.
• Move throttle control to desired running position.
• Allow engine to warm up for a few minutes before
engaging tines.
NOTE: If at a high altitude (3000 feet) or in cold
temperatures (below 32°F), the carburetor fuel mixture
may need to be adjusted for best engine performance.
See “TO ADJUST CARBURETOR” in the Service and
Adjustments section of this manual.

9
OPERATION
FIG. 9
321
5
4
67
FIG. 10
FIG. 8
engine_art_71
RECOIL
STARTER
THROTTLE
CONTROL
CHOKE
CONTROL
SPARK PLUG
BREAKING IN YOUR TILLER
Break-in your belt(s), pulleys and tine control before you
actually begin tilling.
• Start engine, tip tines off ground by pressing handles
down and engage tine control to start tine rotation.
Allow tines to rotate for five minutes.
• Check tine operation and adjust if necessary. See“TINE
OPERATION CHECK” in the Service and Adjustments
section of this manual.
TILLING HINTS
CAUTION: Until you are accustomed
to handling your tiller, start actual field
use with throttle in slow position.
To help tiller move forward, lift up the handles slightly (thus
lifting depth stake out of ground). To slow down the tiller,
press down on handles.
If you are straining or tiller is shaking, the wheels and depth
stake are not set properly in the soil being tilled.The proper
setting of the wheels and depth stake is through trial and
error and depends upon the soil condition. (The harder or
wetter the ground, the slower the engine and tine speed
needed. Under these poor conditions, at fast speed the
tiller will run and jump over the ground).
A properly adjusted tiller will dig with little effort from the
operator.
• Tilling is digging into, turning over, and breaking up
packed soil before planting. Loose, unpacked soil helps
root growth. Best tilling depth is 4"-6". A tiller will also
clear the soil of unwanted vegetation.The decomposition
of this vegetable matter enriches the soil. Depending
on the climate (rainfall and wind), it may be advisable
to till the soil at the end of the growing season to further
condition the soil.
• Soil conditions are important for proper tilling.Tines will
not readily penetrate dry, hard soil which may contribute
to excessive bounce and difficult handling of your tiller.
Hard soil should be moistened before tilling; however,
extremely wet soil will “ball-up” or clump during tilling.
Wait until the soil is less wet in order to achieve the
best results. When tilling in the fall, remove vines and
long grass to prevent them from wrapping around the
tine shaft and slowing your tilling operation.
• You will find tilling much easier if you leave a row un-
tilled between passes. Then go back between tilled
rows. (See Fig. 9) There are two reasons for doing
this.First, wide turns are much easier to negotiate than
about-faces. Second, the tiller won’t be pulling itself,
and you, toward the row next to it.
• Set depth stake and wheel height for shallow tilling
when working extremely hard soil or sod. Then work
across the first cuts at normal depth.
CULTIVATING
Cultivating is destroying the weeds between rows to pre-
vent them from robbing nourishment and moisture from the
plants. At the same time, breaking up the upper layer of
soil crust will help retain moisture in the soil. Best digging
depth is 1"-3".
• You will probably not need to use the depth stake.Begin
by tipping the depth stake forward until it is held by the
stake spring.
• Cultivate up and down the rows at a speed which will
allow tines to uproot weeds and leave the ground in
rough condition, promoting no further growth of weeds
and grass (See Fig. 10).
NOTE: If engine does not start, see troubleshooting
points.

10
MAINTENANCE
GENERAL RECOMMENDATIONS
The warranty on this tiller does not cover items that have
been subjected to operator abuse or negligence. To receive
full value from the warranty, operator must maintain tiller
as instructed in this manual.
Some adjustments will need to be made periodically to
properly maintain your tiller.
All adjustments in the Service and Adjustments section
of this manual should be checked at least once each
season.
• Once a year you should replace the spark plug, clean
or replace air filter, and check tines and belt for wear.
A new spark plug and clean air filter assure proper
air-fuel mixture and help your engine run better and
last longer.
BEFORE EACH USE
• Check engine oil level.
• Check tine operation.
• Check for loose fasteners.
LUBRICATION
Keep unit well lubricated (See “LUBRICATION CHART”)
.
MAINTENANCE
SCHEDULE
FILL IN DATES
AS YOU COMPLETE
REGULAR SERVICE
Check Engine Oil Level
Change Engine Oil
Oil Pivot Points
Inspect Air Screen
Inspect Spark Arrester / Muffler
Clean or Replace Air Cleaner Cartridge
Clean Engine Cylinder Fins
Replace Spark Plug
BEFORE EACH USE
EVERY 25 HOURS
EVERY 5 HOURS
EVERY 50 HOURS
SERVICE DATES
1,2
2
1 - Change more often when operating under a heavy load or in high ambient temperatures.
2 - Service more often when operating in dirty or dusty conditions.
LUBRICATION CHART
cSAE 30 OR 10W-30 MOTOR OIL
dREFER TO MAINTENANCE “ENGINE” SECTION
dENGINE
cTINE CONTROL
cIDLER
ARM

11
MAINTENANCE
engine_art_12
Disconnect spark plug wire before performing any maintenance (except carburetor adjustment) to
prevent accidental starting of engine.
Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Remove fuel from tank
before tipping unit for maintenance. Clean muffler area of all grass, dirt, and debris.
Do not touch hot muffler or cylinder fins as contact may cause burns.
FIG. 12
OIL FILLER
PLUG
OIL
DRAIN
PLUG
OIL LEVEL
AIR CLEANER (See Fig. 13)
Service air cleaner cartridge every 50 hours, more often
if engine is used in very dusty conditions.
• Loosen air cleaner screws, one on each side of
cover.
• Remove air cleaner cover.
• Carefully remove air cleaner cartridge. Be careful. Do
not allow dirt or debris to fall into carburetor.
• Clean by tapping gently on a flat surface.
• If very dirty or damaged, replace cartridge.
• Clean and replace cover. Tighten screws securely.
CAUTION: Petroleum solvents, such as
kerosene, are not to be used to clean
cartridge. They may cause deterioration
of the cartridge. Do not oil cartridge.
Do not use pressurized air to clean or
dry cartridge.
FIG. 11
AIR CLEANER
CARTRIDGE
AIR
CLEANER
SCREW
COVER
FIG. 13
ENGINE
LUBRICATION
Use only high quality detergent oil rated with API service
classification SG-SL. Select the oil’s SAE viscosity grade
according to your expected temperature.
NOTE: Although multi-viscosity oils (5W-30, 10W-30, etc.)
improve starting in cold weather, these multi-viscosity oils
will result in increased oil consumption when used above
32°F (0°C). Check your engine oil level more frequently to
avoid possible engine damage from running low on oil.
Change the oil after every 50 hours of operation or at
least once a year if the tiller is not used for 50 hours in
one year.
Check the crankcase oil level before starting the engine
and after each five (5) hours of continuous use. Add SAE
30 motor oil or equivalent. Tighten oil filler plug securely
each time you check the oil level.
TEMPERATURE RANGE ANTICIPATED BEFORE NEXT OIL CHANGE
SAE VISCOSITY GRADES
-20 0 30 40 80 100
-30 -20 0 20 30 40
F
C
32
-10 10
60
5W-30
SAE 30
oil_visc_chart1_e
TO CHANGE ENGINE OIL (See Figs. 11 and 12)
Determine temperature range expected before oil change.
All oil must meet API service classification SG-SL.
• Be sure tiller is on level surface.
• Oil will drain more freely when warm.
• Catch oil in a suitable container.
• Remove drain plug.
• Tip tiller forward to drain oil.
• After oil has drained completely, replace oil drain plug
and tighten securely.
• Remove oil filler plug. Be careful not to allow dirt to
enter the engine.
• Refill engine with oil. See “FILL ENGINE WITH OIL ”
in the Operation section of this manual.

12
MAINTENANCE
MUFFLER
Do not operate tiller without muffler. Do not tamper with
exhaust system.Damaged mufflers or spark arresters could
create a fire hazard. Inspect periodically and replace if
necessary. If your engine is equipped with a spark arrester
screen assembly, remove every 50 hours for cleaning and
inspection. Replace if damaged.
TRANSMISSION
Your transmission is sealed and will only require lubrication
if it is serviced.
CLEANING
Do not clean your tiller when the engine and transmission
are hot. We do not recommend using pressurized water
(garden hose, etc.) to clean your unit unless the gasket
area around the transmission and the engine muffler, air
filter and carburetor are covered to keep water out. Water
in engine will shorten the useful life of your tiller.
• Clean engine, wheels, finish, etc. of all foreign mat-
ter.
• Keep finished surfaces and wheels free of all gasoline,
oil, etc.
• Protect painted surfaces with automotive type wax.
engine_art_71
COOLING SYSTEM (See Fig. 14)
Your engine is air cooled. For proper engine performance
and long life keep your engine clean.
• Clean air screen frequently using a stiff-bristled
brush.
• Remove blower housing and clean as necessary.
• Keep cylinder fins free of dirt and chaff.
FIG. 14
MUFFLER
AIR SCREEN
BLOWER
HOUSING
CYLINDER FINS
SPARK PLUG
Replace spark plugs at the beginning of each tilling sea-
son or after every 50 hours of use, whichever comes first.
Spark plug type and gap setting is shown in “PRODUCT
SPECIFICATIONS” on page 3 of this manual.

13
CAUTION: Disconnect spark plug wire from spark plug and place wire where it cannot come into
contact with plug.
SERVICE AND ADJUSTMENTS
TILLER
TO ADJUST HANDLE HEIGHT (See Fig. 15)
Factory assembly has provided lowest handle height. Select
handle height best suited for your tilling conditions. Handle
height will be different when tiller digs into soil.
• If a higher handle height is desired, loosen the four
nuts securing handle panel to engine brackets.
• Slide handle panel to desired location.
• Tighten the four nuts securely.
HANDLE
PAN EL
ENGINE
BRACKETS
NUTS (ALSO 2
ON LEFT SIDE
OF TILLER)
FIG. 15
MID-WIDTH TILLING - 24 INCH PATH (See Fig. 17)
• Assemble holes “A” in tine hubs to holes “C” in tine
shaft.
tine_5
A
C
AC
FIG. 17
NARROW TILLING/CULTIVATING - 12-3/4 INCH PATH
(See Fig. 18)
• Remove outer tines.
FIG. 18
tine_6
INNER TINES ONLY
TINE ARRANGEMENT
Your outer tines can be assembled in several different ways
to suit your tilling or cultivating needs.
CAUTION: Tines are sharp. Wear
gloves or other protection when han-
dling tines.
NORMAL TILLING - 26 INCH PATH (See Fig. 16)
• Assemble holes “A” in tine hubs to holes “B” in tine
shaft.
tine_4
OUTER
TINE
HAIRPIN CLIP
A
B
A
B
FIG. 16
INNER TINE
CLEVIS
PIN
NOTE: When reassembling outer tines, be sure right tine
assembly (marked “R”) and left tine assembly (marked “L”)
are mounted to correct side of tine shaft.

14
TO REPLACE V-BELTS (See Figs. 21 and 22)
Replace V-belts if they have stretched considerably or if
they show cracks or frayed edges. There are two (2) V-belts
- forward (inside) and reverse (outside).
Belt guard must be removed to service belts. See “TO
REMOVE BELT GUARD” in this section of manual.
NOTE: Observe carefully routing of both belts and location
of all belt guides before removing belts.
BELT REMOVAL
• Remove reverse idler pulley from idler arm.
• Remove reverse (outside) V-belt.
• Remove forward (inside)V-belt from transmission pulley
first and then from engine pulley.
BELT REPLACEMENT
• Install new forward (inside) V-belt to engine pulley first
then to transmission pulley. Be sure belt is positioned
on inside groove of both pulleys, inside all belt guides
and rests on idler pulley.
• Before installing reverse (outside)V-belt, turn belt“inside
out”. Twist so wide, flat surface of belt is to inside.
• WrapV-belt around reverse idler pulley and reassemble
idler to idler arm. Tighten securely. Be sure belt is
between reverse idler pulley and idler arm pin.
• Install belt to outside groove of transmission pulley. Be
sure belt is inside all belt guides and rests on outside
groove of engine pulley.
FINAL CHECK “ON” POSITION
• With tine control “ON” (held down to handle) push down
on handle to raise tines off the ground.
• Slowly pull recoil starter handle while observing tines.
Tines should rotate forward.
• If tines do not rotate, inner wire of control cable is too
loose. Loosen cable clip and pull cable up to remove
slack and retighten clip.
TINE CONTROL “OFF” POSITION
handles_93
TINE CONTROL CABLE
CABLE CLIP
TINE CONTROL
“ON” POSITION
BODY
FIG. 20
TO REMOVE BELT GUARD (See Fig. 19)
• Remove two (2) cap nuts and washers from side of
belt guard.
• Loosen (do not remove) tine shield nut on underside
of tine shield.
• Pull belt guard out and away from unit.
• Replace belt guard by reversing above procedure. Be
sure slot in bottom of belt guard is under head of tine
shield bolt and all nuts are tightened securely.
SERVICE AND ADJUSTMENTS
TINE OPERATION CHECK (See Fig. 20)
WARNING: Disconnect spark plug wire
from spark plug to prevent starting while
checking tine operation.
For proper tine operation, forward tine control lever must be
against control body and all slack removed from inner wire of
control cable when control is in the “OFF” (up) position.
If lever and cable are loose, loosen cable clip at lower end of
cable. Pull up on cable to remove slack, without extending
spring on end of cable, and retighten cable clip.
FINAL CHECK “OFF” POSITION
• With tine control “OFF” (up), push down on handle to
raise tines off the ground.
• Slowly pull recoil starter handle while observing tines.
Tines should not rotate.
• If tines rotate, inner wire of control cable is too tight
which is extending lower spring and engaging tines.
Loosen cable clip and push down on cable only enough
to relieve spring tension. Tighten cable clip.
• Recheck in “OFF” position and adjust if necessary.
FIG. 19
BELT
GUARD
CAP NUTS
AND WASHERS
TINE SHIELD NUT
• Recheck in “ON” position and adjust if necessary.
NOTE: If “ON”position check required adjustment, recheck
“OFF”position adjustment to insure tines do not rotate when
control is “OFF” (up).

15
SERVICE AND ADJUSTMENTS
belts 10
BELT GUIDE
REVERSE
IDLER PULLEY
BELT GUIDE
TRANSMISSION PULLEY
FORWARD IDLER PULLEY
REVERSE
IDLER PULLEY IDLER
ARM PIN
ENGINE
PULLEY
FRONT VIEW REFERENCE
REVERSE (OUTSIDE) V-BELT
FORWARD MOTION (INSIDE) V-BELT
ENGINE PULLEY
REVERSE
IDLER
PULLEY
ENGINE PULLEY
FORWARD
IDLER PULLEY
FIG. 22
FORWARD MOTION
(INSIDE) V-BELT
ENGINE PULLEY
REVERSE IDLER ARM
REVERSE
IDLER PULLEY
IDLER
ARM PIN
BELT
GUARD
BOLT
TRANSMISSION
PULLEY
FIG. 21
FORWARD IDLER PULLEY
BELT GUIDE
REVERSE (OUTSIDE) V-BELT
CHECK TINE OPERATION
• See “TINE OPERATION CHECK” in this section of
manual.
REPLACE BELT GUARD
ENGINE
Maintenance, repair, or replacement of the emission con-
trol devices and systems, which are being done at the
customers expense, may be performed by any non-road
engine repair establishment or individual. Warranty repairs
must be performed by an authorized engine manufacturer's
service outlet.
TO ADJUST CARBURETOR
The carburetor has been preset at the factory and adjustment
should not be necessary. However, engine performance
can be affected by differences in fuel, temperature, altitude
or load. If the carburetor does need adjustment, contact
your nearest authorized service center/department
IMPORTANT: NEVER TAMPER WITH THE ENGINE
GOVERNOR,WHICH IS FACTORY SET FOR PROPER ENGINE
SPEED. OVERSPEEDINGTHE ENGINE ABOVETHE FACTORY
HIGH SPEED SETTING CAN BE DANGEROUS. IF YOU THINK
THE ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING,
CONTACTYOUR NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS THE PROPER EQUIPMENT AND
EXPERIENCE TO MAKE ANY NECESSARY ADJUSTMENTS.

16
STORAGE
ENGINE OIL
Drain oil (with engine warm) and replace with clean oil. (See
“ENGINE” in the Maintenance section of this manual).
CYLINDER(S)
• Remove spark plug.
• Pour 1 ounce (29 ml) of oil through spark plug hole
into cylinder.
• Pull starter handle slowly several times to distribute
oil.
• Replace with new spark plug.
OTHER
• Do not store gasoline from one season to another.
• Replace your gasoline can if your can starts to rust.
Rust and/or dirt in your gasoline will cause problems.
• If possible, store your unit indoors and cover it to give
protection from dust and dirt.
• Cover your unit with a suitable protective cover that
does not retain moisture. Do not use plastic. Plastic
cannot breathe which allows condensation to form and
will cause your unit to rust.
IMPORTANT: NEVER COVER TILLER WHILE ENGINE AND
EXHAUST AREAS ARE STILL WARM.
Immediately prepare your tiller for storage at the end of the
season or if the unit will not be used for 30 days or more.
WARNING: Never store the tiller with
gasoline in the tank inside a building
where fumes may reach an open flame
or spark. Allow the engine to cool before
storing in any enclosure.
TILLER
• Clean entire tiller (See “CLEANING”in the Maintenance
section of this manual).
• Inspect and replace belts, if necessary (See belt re-
placement instructions in the Service and Adjustments
section of this manual).
• Lubricate as shown in the Maintenance section of this
manual.
• Be sure that all nuts, bolts and screws are securely
fastened. Inspect moving parts for damage, breakage
and wear. Replace if necessary.
• Touch up all rusted or chipped paint surfaces; sand
lightly before painting.
ENGINE
FUEL SYSTEM
IMPORTANT:IT IS IMPORTANT TO PREVENT GUM DEPOSITS
FROM FORMING IN ESSENTIAL FUEL SYSTEM PARTS SUCH
AS THE CARBURETOR, FUEL FILTER, FUEL HOSE, OR TANK
DURING STORAGE. ALSO, EXPERIENCE INDICATES THAT
ALCOHOL BLENDED FUELS (CALLED GASOHOL OR USING
ETHANOL OR METHANOL) CAN ATTRACT MOISTUREWHICH
LEADSTO SEPARATION AND FORMATION OF ACIDS DURING
STORAGE. ACIDIC GAS CAN DAMAGE THE FUEL SYSTEM
OF AN ENGINE WHILE IN STORAGE.
• Drain the fuel tank.
• Start the engine and let it run until the fuel lines and
carburetor are empty.
• Never use engine or carburetor cleaner products in the
fuel tank or permanent.
NOTE: Fuel stablizer is an acceptable alternative in
minimizing the formation of fuel gum deposits during
storage. Add stabilizer to gasoline in fuel tank or storage
container. Always follow the mix ratio found on stablizer
container. Run engine at least 10 minutes after adding
stablizer to allow the stabilizer to reach the carburetor.
Do not drain the gas tank and carburetor if using fuel
stabilizer.

17
TROUBLESHOOTING POINTS
Will not start 1. Out of fuel. 1. Fill fuel tank.
2. Engine not “CHOKED” properly. 2. See “TO START ENGINE” in the Operation section.
3. Engine flooded. 3. Wait several minutes before attempting to start.
4. Dirty air cleaner. 4. Clean or replace air cleaner cartridge.
5. Water in fuel. 5. Drain fuel tank and carburetor, and refill tank with fresh
gasoline.
6. Clogged fuel tank. 6. Remove fuel tank and clean.
7. Loose spark plug wire. 7. Make sure spark plug wire is seated properly on plug.
8. Bad spark plug or improper gap. 8. Replace spark plug or adjust gap.
9. Carburetor out of adjustment. 9. Make necessary adjustments.
Hard to start 1. Throttle control not set properly. 1. Place throttle control in “FAST” position.
2. Dirty air cleaner. 2. Clean or replace air cleaner cartridge.
3. Bad spark plug or improper gap. 3. Replace spark plug or adjust gap.
4. Stale or dirty fuel. 4. Drain fuel tank and refill with fresh gasoline.
5. Loose spark plug wire. 5. Make sure spark plug wire is seated properly on plug.
6. Carburetor out of adjustment. 6. Make necessary adjustments.
Loss of power 1. Engine is overloaded. 1. Set depth stake and wheels for shallower tilling.
2. Dirty air cleaner. 2. Clean or replace air cleaner cartridge.
3. Low oil level/dirty oil. 3. Check oil level/change oil.
4. Faulty spark plug. 4. Clean and regap or change spark plug.
5. Oil in fuel. 5. Drain and clean fuel tank and refill, and clean carburetor.
6. Stale or dirty fuel. 6. Drain fuel tank and refill with fresh gasoline.
7. Water in fuel. 7. Drain fuel tank and carburetor, and refill tank with fresh
gasoline.
8. Clogged fuel tank. 8. Remove fuel tank and clean.
9. Spark plug wire loose. 9. Connect and tighten spark plug wire.
10. Dirty engine air screen. 10. Clean engine air screen.
11. Dirty/clogged muffler. 11. Clean/replace muffler.
12. Carburetor out of adjustment. 12. Make necessary adjustments.
13. Poor compression. 13. Contact an authorized service center/department.
Engine overheats 1. Low oil level/dirty oil. 1. Check oil level/change oil.
2. Dirty engine air screen. 2. Clean engine air screen.
3. Dirty engine. 3. Clean cylinder fins, air screen, muffler area.
4. Partially plugged muffler. 4. Remove and clean muffler.
5. Improper carburetor adjustment. 5. Adjust carburetor to richer position.
Excessive bounce/ 1. Ground too dry and hard. 1. Moisten ground or wait for more favorable soil
difficult handling conditions.
2. Wheels and depth stake incorrectly adjusted. 2. Adjust wheels and depth stake.
Soil balls up or clumps 1. Ground too wet. 1. Wait for more favorable soil conditions.
Engine runs but tiller 1. Tine control is not engaged. 1. Engage tine control.
won’t move 2. V-belt not correctly adjusted. 2. Inspect/adjust V-belt.
3. V-belt is off pulley(s). 3. Inspect V-belt.
Engine runs but labors 1. Tilling too deep. 1. Set depth stake for shallower tilling.
when tilling 2. Throttle control not properly adjusted. 2. Check throttle control setting.
3. Carburetor out of adjustment. 3. Make necessary adjustments.
PROBLEM CAUSE CORRECTION

18
KEY PART
NO. NO. DESCRIPTION
1 187814X010 Panel, Control
3 110632X Grip, Handle
12 98000129 Nut, Flange
13 STD533107 Bolt, Carriage 5/16-18 x 3/4
14 181476 Assembly, Panel and Tube
18 3066J Cable, Tine Control
19 151229 Lever, Control, Tine
20 154805 Pin, Pivot
21 12000027 Ring, Clip
KEY PART
NO. NO. DESCRIPTION
1
38 3
3
18
22
21 19
20
29
35
35
36
13
12
50
14
handle_assy_35
NOTE: All component dimensions given in U.S. inches.
1 inch = 25.4 mm
REPAIR PARTS
TILLER - - MODEL NUMBER 944.621554
HANDLE ASSEMBLY
22 188171 Cable Asm Reverse
29 12000059 Retainer, Ring
35 72010520 Bolt 5/16-18 x 2-1/2
36 73970500 Locknut, Flange 5/16-18 unc
38 152094 Assembly, Handle Column
50 181580 Clip Routine Dual

19
41 1
2
3
4
542
678
29
11
9
17
31
30 29
11
11
11
10
14
15
12
12
13
16
19
32
18
20
25
21
22
23
24
26
28
27
belt_guard_14
KEY PART
NO. NO. DESCRIPTION
1 180377 Assembly, Bracket, Belt Guard
2 9484R Clip, Cable
3 86777 Screw, Hex Washer Head, Slotted,
Thread Cutting #10-24 x 1/2 Type D
4 74610812 Bolt, Hex Head 1/2-20 x 3/4
5 73680600 Nut, Hex 3/8-16
6 19131316 Washer 13/32 x 13/16 x 16 Gauge
7 2009J Pulley, Idler, Reverse
8 180323 Assembly, Arm, Reverse Idler
9 74760628 Bolt, Hex Head 3/8-16 x 1-3/4
10 156705X558 Guard, Belt
11 STD551025 Washer 9/32 x 5/8 x 16 Gauge
12 104213X Nut, Cap 1/4- 20
13 72140406 Bolt, Carriage 1/4-20 x 3/4
14 133035 V-Belt (Forward Motion)
15 2614J V-Belt (Reverse)
16 12000028 Ring, Retainer
17 2649M Key, Square
18 151236 Sheave, Transmission "Flat"
19 188502 Bolt, Belt Guard
20 12000036 Ring, Klip
21 STD541237 Nut, Hex, Jam 3/8-16
22 161806 Pulley, Idler
23 175377 Arm, Idler
24 STD523712 Bolt, Hex Head 3/8-16 x 1-1/4
25 106968X Shaft, Idler Arm
26 73350500 Nut, Hex, Jam 5/16-18
27 STD541025 Nut, Hex 1/4-20
28 STD551125 Washer, Lock 1/4
29 109227X Pad, Idler
30 23200404 Screw, Set , Socket, Headless
C.P. 1/4-20 x 1/4
31 101189L Sheave, Engine
32 151223 Sheave, Transmisison
41 180307 Spring Extension
42 138909 Spacer
NOTE: All component dimensions given in U.S. inches.
1 inch = 25.4 mm
REPAIR PARTS
TILLER - - MODEL NUMBER 944.621554
BELT GUARD AND PULLEY ASSEMBLY
KEY PART
NO. NO. DESCRIPTION

20
KEY PART
NO. NO. DESCRIPTION
6
7
8
13
9
10
11
22
15
3
24
54
7
4
5
17
16
18
18
21
17
16
2
2
13
24
19
19
20
20
wheel_d.stake_2
KEY PART
NO. NO. DESCRIPTION
1 9194R Pin, Clevis
2 74760520 Bolt, Hex Head 5/16-18 x 1-1/4
3 STD523107 Bolt, Hex Head 5/16-18 x 3/4
4 STD541031 Nut, Hex 5/16-18
5 STD551131 Washer, Lock 5/16
6 73800600 Locknut, w/washer 3/8-16
7 4921H Clip, Hairpin
8 1952J Support, Depth Stake, R.H.
9 122233X Stake, Depth
10 326J Pin, Clevis
11 74780628 Bolt, Hex 3/8-16 x 1-3/4
13 1951J Support, Depth Stake, L.H.
15 5388J Spring, Stake
16 121117X Bolt, Shoulder
17 9188R Wheel
18 STD551037 Washer 13/32 x 13/16 x 11 Gauge
19 9190R Bracket, Wheel
20 STD541437 Locknut, Crown 3/8-16
21 74760516 Bolt, Hex Head 5/16-18 x 1
22 73800500 Locknut, w/insert 5/16-18
24 73970500 Locknut, Flange 5/16-18 Unc
NOTE: All component dimensions given in U.S. inches.
1 inch = 25.4 mm
REPAIR PARTS
TILLER - - MODEL NUMBER 944.621554
WHEEL AND DEPTH STAKE ASSEMBLY