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MC550
Operator's manual / /96083000300 / 2010-01
01.12.10 AP
433691 Printed in the U.S.A.
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SAFETY RULES
Safe Operation Practices for Walk-Behind Powered Ro ta ry Tillers
TRAINING
• Read the Owner’s Manual care ful ly. Be thor ough ly
fa mil iar with the controls and the proper use of the
equip ment. Know how to stop the unit and disengage
the controls quickly.
• Never allow children to operate the equipment. Never
allow adults to op er ate the equipment without proper
instruction.
• Keep the area of operation clear of all persons, par tic u lar ly 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 (mo tor).
• Do not operate the equipment with out wearing ad e quate
outer gar ments. Wear footwear that will im prove 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
rec om mend ed by manufacturer).
OPERATION
• Do not put hands or feet near or under rotating parts.
• Exercise extreme caution when op er at ing on or cross ing gravel drives, walks, or roads. Stay alert for hidden
hazards or traffic. Do not carry pas sen gers.
• After striking a foreign object, stop the engine (motor),
remove the wire from the spark plug, thoroughly in spect
the tiller for any damage, and repair the damage before
restarting and op er at ing the tiller.
• Exercise caution to avoid slipping or falling.
• If the unit should start to vibrate ab nor mal ly, stop the
engine (motor) and check immediately for the cause.
Vi bra tion is generally a warning of trouble.
• Stop the engine (motor) when leaving the operating
position.
• Take all possible precautions when leav ing the ma chine
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.
• 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
work ing condition.
• Check shear pins, engine mounting bolts, and other
bolts at frequent intervals for proper tightness to ensure
the equip ment 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
im por tant details if the tiller is to be stored for an extended period.
- IMPORTANT -
CAUTIONS, IMPORTANTS, AND NOTES ARE A MEANS OF
ATTRACTING ATTENTION TO IMPORTANT OR CRIT I CAL
IN FOR MA TION IN THIS MANUAL.
IMPORTANT: USED TO ALERT YOU THAT THERE IS A
POS SI BIL I TY OF DAM AG ING THIS EQUIP MENT.
NOTE: Gives essential information that will aid you to better un der stand, incorporate, or execute a particular set of
instructions.
Look for this symbol to point out im por tant safety precautions. It means
CAUTION!!! BE COME ALERT!!! YOUR
SAFE TY IS INVOLVED.
CAUTION: Always disconnect spark
plug wire and place wire where it can not contact spark plug in order to pre vent ac ci den tal starting when setting
up, trans port ing, adjusting or making
re pairs.
WARNING
The engine exhaust from this product con tains chem i cals known to the State of Cal i for nia to cause cancer, birth defects, or other
reproductive harm.
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PRODUCT SPECIFICATIONS
Gasoline Capacity: 0.9 Quarts (0,85 L)
Unleaded Regular
Oil (API-SG-SL): SAE 10w-30(Above 32°F/0°C)
(Capacity: 20 oz./0.6L) SAE 5w-30(Below 32°F/0°C)
Spark Plug: Champion RJ19LM or J19LM
(Gap: .030"/0.76mm)
CONGRATULATIONS on your purchase of a new tiller. It
has been designed, en gi neered and manu fac tured to give
you the best pos sible de penda bil ity and per form ance.
Should you experience any prob lems you can not easily
remedy, please contact your nearest authorized service
center. We have com pe tent, well-trained tech ni cians and
the proper tools to service or repair this unit.
Please read and retain this manual. The in struc tions will
enable you to assemble and main tain your tiller prop erly.
Always observe the “SAFETY RULES”.
CUSTOMER RESPONSIBILITIES
• Read and observe the safety rules.
• Follow a regular schedule in maintaining, caring for
and using your tiller.
• Follow instructions under “Maintenance” and “Stor age”
sections of this Manual.
IMPORTANT: THIS UNIT IS EQUIPPED WITH AN INTERNAL
COMBUSTION ENGINE AND SHOULD NOT BE USED ON
OR NEAR ANY UNIMPROVED FOREST-COVERED, BRUSHCOVERED OR GRASS COVERED LAND UNLESS THE
ENGINE'S EXHAUST SYSTEM IS EQUIPPED WITH A SPARK
ARRESTER MEETING APPLICABLE LOCAL LAWS (IF ANY).
IF A SPARK ARRESTER IS USED, IT SHOULD BE MAINTAINED
IN EFFECTIVE WORK ING ORDER BY THE OPERATOR.
IN THE STATE OF CALIFORNIA, A SPARK ARRESTER IS
REQUIRED BY LAW (SECTION 4442 OF THE CALIFORNIA
PUBLIC RESOURCES CODE). OTHER STATES MAY HAVE
SIMILAR LAWS. FEDERAL L AWS APPLY ON FEDERAL LANDS.
SEE YOUR AUTHORIZED SERVICE CENTER/DEPARTMENT
FOR SPARK ARRESTER.
TABLE OF CONTENTS
SAFETY RULES ............................................................ 2
PRODUCT SPECIFICATIONS ....................................... 3
CUSTOMER RESPONSIBILITIES ................................. 3
ASSEMBLY ................................................................. 4-5
OPERATION ...............................................................6-9
MAINTENANCE SCHEDULE ...................................... 10
MAINTENANCE .....................................................10-12
SERVICE & ADJUSTMENTS ................................. 13-14
STORAGE .................................................................... 15
TROUBLESHOOTING ................................................. 16
PARTS ..................................................................... 17-21
3
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ASSEMBLY
LOWER HANDLE
COLUMN
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 ensure proper tightness.
TOOLS REQUIRED FOR ASSEMBLY
A socket wrench set will make assembly easier. Standard
wrench sizes are listed.
(1) Utility Knife
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).
FRONT
RIGHTLEFT
OPERATOR'S POSITION
Fig. 1
CONTENTS OF HARDWARE PACK
(1) Washer
Manual
(3) Handle Knobs
UNPACK CARTON & INSTALL HANDLE
(See Fig. 2 and 3)
CAUTION: Be careful of exposed
sta ples when handling or disposing of
carton material.
IMPORTANT: WHEN UNPACKING AND AS SEM BLING TILLER,
BE CAREFUL NOT TO STRETCH OR KINK CABLE(S).
• Cut cable ties securing handle column.
• Remove all packing from carton.
• Remove lower handle column from carton.
• Position lower handle column between bent tubes,
lining up holes as shown.
• Secure lower handle column using two (2) 4-1/2" carriage bolts, two (2) washers and two (2) handle knobs.
Tighten securely.
LOWER HANDLE
COLUMN
BOLTS
Fig. 2
• Remove upper handle column from carton.
• Route cable(s) as shown and slide upper handle column
onto lower handle column.
• Secure upper handle column using two (2) 2-1/2" carriage bolts and two (2) handle knobs. Tighten se cure ly.
• Cut away carton.
• Cut cable ties securing tiller to skid. Re move tiller from
skid by pulling backwards.
UPPER
HANDLE
COLUMN
BENT
TUBES
KNOBS
WASHERS
(1) Carriage Bolt
5/16”-18 unc x 4-1/2”
(2) Carriage Bolts
5/16”-18 unc x 2-1/2”
(1) Clevis Pin
(1) Hairpin Clip
TINE
CONTROL
CABLE
Fig. 3
BOLTS
KNOBS
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ASSEMBLY
TO INSTALL DEPTH STAKE (See Fig. 4)
• Remove screw(s) securing depth stake to skid and
discard the screw(s).
• Slide depth stake down into transport arm track, lining up a hole in the depth stake with hole in transport
arm.
• Install clevis pin and hairpin clip.
DEPTH
STAKE
CLEVIS PIN
HAIRPIN CLIP
Fig. 4
TILLING WIDTH
• Tilling width may be adjusted to better handle your
tilling con di tions (See “TINE ARRANGEMENT” in the
Service and Adjustments section of this manual.)
TINE OPERATION
• Check tine operation before first use. (See “TINE
OPERATION CHECK” in the Service and Adjustments
section of this manual.)
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OPERATION
KNOW YOUR TILLER
READ THIS 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.
These symbols may appear on your Tiller or in literature supplied with the product. Learn and understand their meaning.
FORWARD TINE CONTROL
PRIMER
RECOIL
STARTER
HANDLE
DEPTH STAKE
Fig. 5
THROTTLE
CONTROL
MEETS ANSI SAFETY REQUIREMENTS
Our tillers conform to the safety standards of the American National Standards Institute.
DEPTH STAKE - Controls forward speed and the depth at
which the tiller will dig.
FORWARD TINE CONTROL - Engages tines in forward
direction.
RECOIL STARTER HANDLE - Used to start the engine.
direction.
THROTTLE CONTROL - Controls engine speed.
PRIMER - pumps additional fuel from the carburetor to the
cylinder for use when starting a cold engine.
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OPERATION
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 tiller and while
tilling. We recommend a wide vision safety mask for over spectacles or standard safety glasses.
00155
HOW TO USE YOUR TILLER
Know how to operate all controls before adding fuel and
oil or attempting to start engine.
STOPPING (See Fig. 6)
TINES
1. Release tine control to stop move ment.
ENGINE
2. Move throttle control to "STOP" position.
TINE CONTROL
“OFF” (UP) PO SI TION
TINE CONTROL
“ON” (DOWN) PO SI TION
TILLING
The speed and depth of tilling is regulated by the position
of the depth stake.
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. 7)
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.
DEPTH
STAKE
HAIRPIN
CLIP
Fig. 6
TINE OPERATION (See Fig. 6)
• Squeeze tine control to handle.
THROTTLE
CONTROL
CLEVIS PIN
Fig. 7
TO TRANSPORT
CAUTION: Before lifting or trans port ing, allow tiller engine and muffler to
cool. Disconnect spark plug wire. Drain
gasoline from fuel tank.
AROUND THE YARD
• Adjust depth stake so clevis pin is in bottom hole.
• 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.
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OPERATION
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 AP PROVED,
CLEAN, COVERED CON TAIN ERS. USE CLEAN FILL FUNNELS.
CHECK ENGINE OIL LEVEL (See Fig. 8)
1. Remove hangtag from engine.
2. The engine in your unit has been shipped, from the factory, already filled with SAE 30 summer weight oil.
3. With engine level, remove engine oil fill er plug.
4. Engine oil should be at "FULL" line on dipstick. If
low, fill to "FULL" line. For approximate capacity, see
"PRODUCT SPECIFICATIONS" on page 3 of this
manual.
5. Reinstall engine oil filler plug.
6. Check oil before each use. Add oil if needed.
CAUTION: DO NOT overfill engine with oil, or it
will smoke heavily from the muffler on startup.
• For cold weather operation you should change oil for
easier starting (See “OIL VISCOSITY CHART” in the
Main te nance section of this man u al).
• To change engine oil, see the Main te nance section of
this manual.
OIL FILLER CAP
MAXIMUM UPPER LEVEL
MINIMUM UPPER LEVEL
IMPORTANT: WHEN OPERATING IN TEMPERATURES BELOW
32°F(0°C), USE FRESH, CLEAN WINTER GRADE GAS O LINE
TO HELP ENSURE GOOD COLD WEATHER START ING.
CAUTION: Alcohol blended fuels (called gas o hol
or using ethanol or methanol) can attract moisture
which leads to sep a ra tion and for ma tion 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
stor age 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 sea son.
See Storage In struc tions for additional information.
Never use engine or carburetor cleaner products
in the fuel tank or permanent damage may occur.
TO START ENGINE (See Fig. 9)
CAUTION: KEEP TINE CONTROL IN “OFF”
PO SI TION WHEN STARTING ENGINE.
NOTE: Due to protective coatings on the engine, a small
amount of smoke may be present during the initial use of
the product and should be considered normal.
1. Make sure spark plug wire is prop er ly connected.
3. Place throttle control in “FAST” position.
4. To start a cold engine, push primer three (3) times
before trying to start. Use a firm push. This step is
not usually nec es sary when starting an engine which
has already run for a few minutes.
5. Grasp recoil starter handle with one hand and grasp
tiller handle with other hand. Pull recoil starter handle
quickly. Do not let starter rope snap back.
NOTE: In cooler weather it may be necessary to repeat
priming steps. In warmer weather over priming may cause
flooding and engine will not start. If you do flood engine,
wait a few minutes before attempting to start and do not
repeat priming steps.
RECOIL
STARTER
HANDLE
Fig. 8
ADD GASOLINE
• Fill fuel tank to bottom of filler neck. Do not overfill.
Use fresh, clean, regular un lead ed 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 quan ti ties that can be used within 30 days to assure
fuel freshness.
CAUTION: Do not fill above 1/2 inch of
top of fuel tank to prevent spills and to
allow for fuel expansion. If gasoline is
ac ci den tal ly 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.
THROTTLE
CONTROL
PRIMER
SPARK
PLUG
Fig. 9
8
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321
5
4
67
OPERATION
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.
TILLING HINTS
CAUTION: Until you are accustomed
to handling your tiller, start ac tu al 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 depth stake is
not set properly in the soil being tilled. The proper setting
of the depth stake is through trial and error and depends
upon the soil con di tion. (The harder or wetter the ground,
the slower the engine and tine speed needed. Under these
poor con di tions, 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 vege ta tion. The
de com po si tion of this vegetable mat ter en rich es the
soil. De pend ing on the climate (rain fall 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 con trib ute
to excessive bounce and difficult handling of your tiller.
Hard soil should be mois tened 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
untilled between passes. Then go back between tilled
rows. (See Fig. 10) There are two reasons for doing
this. First, wide turns are much easier to negotiate than
about-faces. Sec ond, the tiller won’t be pulling itself,
and you, toward the row next to it.
• Set depth stake for shallow tilling when working extremely hard soil or sod. Then work across the first
cuts at normal depth.
Fig. 10
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 con di tion, promoting no fur ther growth of weeds
and grass (See Fig. 11).
Fig. 11
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Page 10
MAINTENANCE
SCHEDULE
FILL IN DATES
AS YOU COMPLETE
REGULAR SERVICE
Check Engine Oil Level
MAINTENANCE
ANNUALLY
BEFORE EACH USE
FIRST 5 HOURS
EVERY 8 HOURS
EVERY 50 HOURS OR ANNUALLY
EVERY 25 HOURS OR ANNUALLY
SERVICE DATES
Change Engine Oil
3
1,2
Oil Pivot Points
Inspect Spark Arrester / Muffler
Clean Air Cooling System
Clean Air Filter
2
Replace Air Filter
Clean Area Around Muffler And Controls
Replace Spark Plug
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.
3 - Initial oil change should be performed after first five (5) hours of operations.
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, the operator must main tain
tiller as instructed in this manual.
Some adjustments will need to be made periodically to
properly maintain your tiller.
At least once a season, check to see if you should make
any of the adjustments described in the Service and Adjustments section of this manual.
• Once a year you should replace the spark plug, clean
or replace air filter, and check tines and belts for wear.
A new spark plug and clean air filter assure proper airfuel mixture and help your engine run better and last
longer.
d EN GINE
2
LUBRICATION CHART
c TINE CON TROL
BEFORE EACH USE
• Check engine oil level.
• Check tine operation.
• Check for loose fasteners.
LUBRICATION
Keep unit well lubricated (See “LUBRICATION CHART”).
cSAE 30 OR 10W-30 MOTOR OIL
dREFER TO MAINTENANCE “ENGINE” SECTION
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MAINTENANCE
Disconnect spark plug wire before performing any maintenance (except car bu re tor adjustment) to
prevent accidental start ing of engine.
Prevent fires! Keep the engine free of grass, leaves, spilled oil, or fuel. Re move 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.
ENGINE
LUBRICATION
Use only high quality detergent oil rated with API service
classification SG-SL. Select the oil’s SAE vis cos i ty grade
according to your expected temperature.
°F
104
86
68
50
32
14
-4
-22
SAE 30
10W-30
SYNTHETIC 5W-30
5W-30
Fig. 12
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 eight (8) hours of continuous use. Add SAE
30 motor oil or equivalent. Tighten oil filler plug securely
each time you check the oil level.
TO CHANGE ENGINE OIL (See Fig. 13)
NOTE: Before tipping tiller to drain oil, empty fuel tank by
running engine until fuel tank is empty.
1. Disconnect spark plug wire from spark plug and place
wire where it cannot come in contact with plug.
2. Remove engine oil cap; lay aside on a clean surface.
°C
40
30
20
10
0
-10
-20
-30
3. Tip tiller on its side as shown and drain oil into a suitable
container. Rock tiller back and forth to remove any oil
trapped inside of engine.
4. Wipe off any spilled oil from tiller or side of engine.
5. Slowly pour oil down the oil fill spout, stopping every
few ounces to check the oil level with the dipstick.
6. Stop adding oil when you reach the FULL mark on the
dipstick. Wait a minute to allow oil to settle.
7. Continue adding small amounts of oil, rechecking the
dipstick until oil level settles at FULL. DO NOT overfill, or engine will smoke heavily from the muffler on
startup.
8. Always be sure to retighten oil dipstick before starting
engine.
9. Re con nect spark plug wire to spark plug.
AIR FILTER
Your engine will not run properly and may be damaged
by using a dirty air filter. Clean the element after every 25
hours of operation or every season. Replace the air filter
every season. Service air cleaner more often under dusty
conditions.
TO CLEAN AIR FILTER ELEMENT
1. Remove screw.
2. Re move air cleaner carefully to pre vent dirt from en ter ing carburetor.
3. Take air cleaner apart and clean air filter element.
4. Wash filter element in liquid de ter gent and water.
5. Wrap filter element in cloth and squeeze dry.
6. Lightly coat filter element with clean engine oil. Squeeze
in towel to re move excess oil. Do not satu rate.
7. Reassemble parts and put back on carburetor.
ASSEMBLE ONE OF THESE
SCREW
LOW POINTS TOWARDS
NARROW EDGE OF ELEMENT
SPARK PLUG WIRE
Fig. 13
CONTAINER
LIP
ASSEMBLE SO LIP
EXTENDS OVER
EDGE OF AIR
CLEANER BODY
LIP WILL FORM
PROTECTIVE SEAL
WHEN COVER IS
ASSEMBLED
11
ELEMENT
CUP
Fig. 14
BODY
Page 12
MAINTENANCE
COOLING SYSTEM
Your engine is air cooled. For proper en gine performance
and long life keep your engine clean.
• Remove blower housing and clean as nec es sary.
• Keep cylinder fins free of dirt and chaff.
BLOWER HOUSING
MUFFLER
(See Fig. 15)
COOLING
FINS
Fig. 15
MUFFLER
Do not operate tiller without muffler. Do not tamper with
exhaust system. Damaged mufflers or spark arresters
could create a fire hazard. Inspect pe ri odi cally and re place
if nec es sary. If your engine is equipped with a spark arrester
screen assembly, re move every 50 hours for cleaning and
inspection. Re place if dam aged.
SPARK PLUG
Replace spark plugs at the beginning of each tilling sea son.
Spark plug type and gap setting are shown in “PROD UCT
SPEC I FI CA TIONS” on page 3 of this manual.
TRANSMISSION
Your transmission is sealed and will not re quire lubrication
unless serviced.
CLEANING
Do not clean your tiller when the engine and transmission
are hot. We do not rec om mend using pressurized water
(gar den hose, etc.) to clean your unit un less the gasket
area around the trans mis sion and the engine muf fler, air
fil ter and car bu re tor are cov ered to keep wa ter out. Wa ter
in en gine will short en the useful life of your tiller.
• Clean engine, wheels, finish, etc. of all foreign matter.
• Keep finished surfaces and wheels free of all gas o line,
oil, etc.
• Protect painted surfaces with au to mo tive type wax.
12
Page 13
tine_6
SERVICE AND ADJUSTMENTS
CAUTION: Disconnect spark plug wire from spark plug and place wire where it cannot come into
contact with plug.
TILLER
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 - 24" PATH (See Fig. 16)
• Assemble holes “A” in tine hubs to holes “B” in tine shaft.
CLEVIS
PIN
A
B
tine_4
HAIRPIN CLIP
Fig. 16
MID-WIDTH TILLING - 22" PATH (See Fig. 17)
• Assemble holes “A” in tine hubs to holes “C” in tine shaft.
OUTER
TINE
A
B
INNER TINE
TO CHECK TINE OPERATION
• Start engine, tip tines off ground by pressing handles
down and engage tine control to start tine rotation.
• Verify tines spin properly.
• Allow tines to rotate for five minutes.
TO REMOVE CLUTCH HOUSING/ENGINE
ASSEMBLY (SEE FIG. 19)
• Drain engine oil and gasoline out of engine.
• Remove (5) carriage bolts and (5) lock nuts attaching
the clutch housing and tine shield to transmission.
• Remove clutch housing/engine assembly and lay on
ground (engine is upside down).
CARRIAGE
BOLTS
C
tine_5
A
C
A
Fig. 17
NARROW TILLING/CULTIVATING - 13" PATH
(See Fig. 18)
• Remove outer tines.
INNER TINES ONLY
Fig. 18
NOTE: When reassembling outer tines, ensure right tine
assembly (marked “R”) and left tine assembly (marked “L”)
are mounted to correct side of tine shaft.
Fig. 19
13
Page 14
SERVICE AND ADJUSTMENTS
TO REPLACE V-BELT (SEE Fig. 20 - 22)
• Clutch housing/engine assembly must be removed to
service belt. See "TO REMOVE CLUTCH HOUSINGIENGINE ASSEMBLY" in this section of manual.
• Using pliers, remove cable spring and return spring
from pivot bracket.
• Remove plastic snap-in plug from clutch housing.
• Using pliers, depress conduit fitting tabs and pull conduit
fitting through hole in clutch housing.
• Pull cable spring and cable through snap-in plug hole
in clutch housing.
CLUTCH
HOUSING
BELT
GUIDE
STUD
RETURN
SPRING
Fig. 20
CABLE
SPRING
SNAP-IN
PLUG
TABS
CONDUIT
FITTING
CABLE
• Replace belt and reinstall pulley, idler bracket, conduit
fitting, springs, and hardware in reverse order.
• Reinstall clutch housing/engine assembly, making sure
belt is inside belt guide stud.
• Check tine operation. See "To Check Tine Operation"
in this section of manual.
ENGINE
TO AD JUST CARBURETOR
The carburetor has been preset at the factory and ad just ment
should not be necessary. However, engine per for mance
can be affected by dif fer enc es in fuel, tem per a ture, al ti tude
or load. If the carburetor does need ad just ment, contact
your nearest authorized service center/de part ment
IMPORTANT: NEVER TAMPER WITH THE ENGINE GOVERNOR, WHICH IS FACTORY SET FOR PROPER ENGINE SPEED.
OVER SPEED ING THE ENGINE ABOVE THE FACTORY HIGH
SPEED SETTING CAN BE DANGEROUS. IF YOU THINK THE
ENGINE-GOVERNED HIGH SPEED NEEDS ADJUSTING,
CONTACT YOUR NEAREST AUTHORIZED SERVICE CENTER/
DEPARTMENT, WHICH HAS THE PROPER EQUIP MENT AND
EXPERIENCE TO MAKE ANY NEC ES SARY ADJUSTMENTS.
• Remove bolt, washer, and lock nut attaching idler
bracket to clutch housing.
BOLT
WASHER
CLUTCH
HOUSING
SNAP-IN
PLUG
LOCK NUT
Fig. 21
• Remove bolt, washer, and lock nut attaching idler pulley
to idler bracket. Remove bushing from between idler
bracket and clutch housing.
BOLT
IDLER PULLEY
WASHER
IDLER BRACKET
Fig. 22
BUSHING
LOCK NUT
14
Page 15
STORAGE
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 build ing 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 nec es sary (See belt re place ment in struc tions in the Service and Ad just ments
section of this manual).
• Lubricate as shown in the Maintenance section of this
manual.
• Ensure that all nuts, bolts and screws are securely
fastened. Inspect moving parts for damage, break age
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 MOISTURE WHICH
LEADS TO SEPARATION AND FORMATION OF ACIDS DURING
STORAGE. ACIDIC GAS CAN DAMAGE THE FUEL SYSTEM
OF AN ENGINE WHILE IN STORAGE.
• Empty the fuel tank by starting 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 damage may occur.
• Use fresh fuel next season.
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 empty
the gas tank and carburetor if using fuel stabilizer.
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 pro tec tive cover that
does not retain moisture. Do not use plastic. Plastic
cannot breathe which allows con den sa tion to form and
will cause your unit to rust.
IMPORTANT: NEVER COVER TILLER WHILE ENGINE AND
EXHAUST AREAS ARE STILL WARM.
TILLER HANDLE STORAGE OPTIONS
The tiller handle assembly can be modified to allow for a
variety of storage positions outlined below.
CAUTION: Do not start or operate tiller when
handle is in any of these positions.
STORAGE POSITION: AGAINST ENGINE
(See Fig. 23)
• Unscrew top or bottom handle knob and washer, and
remove top or bottom carriage bolt.
• Rotate entire handle assembly about carriage bolt
(pivot point) and lay handle against engine shroud.
TOP CARRIAGE BOLT
Fig. 23
STORAGE POSITION: IN TRANSPORT ARM
STORAGE FEATURE (See Fig. 24)
• Unscrew (2) handle knobs and remove (2) carriage bolts.
• Remove top handle assembly and place it in handle
storage feature in transport arm.
TOP
KNOB
ENGINE OIL
Drain oil (with engine warm) and replace with clean oil. (See
“ENGINE” in the Maintenance section of this man ual.)
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.
15
BOTTOM
HANDLE
KNOB
TOP
HANDLE
KNOB
Fig. 24
Page 16
TROUBLESHOOTING
PROBLEM CAUSE CORRECTION
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. Empty 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. Ensure 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. Empty fuel tank and refill with fresh gasoline.
5. Loose spark plug wire. 5. Ensure 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 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. Empty and clean fuel tank and refill, and clean
carburetor.
6. Stale or dirty fuel. 6. Empty fuel tank and refill with fresh gasoline.
7. Water in fuel. 7. Empty 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. Depth stake incorrectly adjusted. 2. Adjust 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 is off pulley(s). 2. 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.
16
Page 17
DECALS
4
TILLER - - MODEL NUMBER MC550 (96083000300)
3
1
2
KEY PART
NO. NO. DESCRIPTION
1 433415 Decal, Tine, Shield, McCulloch
2 434458 Decal, Tine, Shield, Warning
3 141906 Decal, Warning, Rotating Tines
4 141907 Decal, Hand Placement
17
Page 18
TILLER - - MODEL NUMBER MC550 (96083000300)
ENGINE, TRANSMISSION, AND TINES
4
1
2
5
3
2
6
7
9
5
7
8
12
13
10
11
18
19
14
15
20
16
29
25
30
21
13
26
22
5
17
23
30
24
28
5
27
31
engine-transmission-tines_1
29
18
Page 19
TILLER - - MODEL NUMBER MC550 (96083000300)
ENGINE, TRANSMISSION, AND TINES
KEY PART
NO. NO. DESCRIPTION
1 421338 Engine
2 72110608 Bolt Carriage 3/8 - 16 x 1
3 73900500 Nut Lock Flg 5/16 -18 unc
4 425398 Plug Snap In
5 73900600 Nut Lock Flg 3/8 - 16 unc
6 421337 Housing Clutch
7 17000616 Screw 3/8 - 16 x 1-1/2
8 421335 Sheave Upper
9 421341 Stud Belt Guard
10 175331 Bushing Pivot
11 421373 Spring Return
12 421339 Bracket Idler
13 74610616 Bolt Hex 3/8 - 24 x 1
14 421379 Belt Drive
15 421378 Pulley Idler
16 19131416 Washer 13/32 x 7/8 x 16 Ga.
17 74780620 Bolt 3/8 - 16 x 1.25
18 133944 Washer .328 x 1.375 x 0.055
19 74520520 Bolt 5/16 - 18 x 1-1/4
20 421354X428 Shield Tine
21 421340 Seal Foam
22 413524 Washer 13/32 x 1-1/2 x 11 Ga.
23 421336 Sheave Lower
24 421334 Coupling Clutch
25 156926 Tine Outer RH
26 156924 Tine Inner RH
27 156925 Tine Outer LH
28 156923 Tine Inner LH
29 4929H Pin Clevis
30 3146R Retainer Spring Zinc
31 425399 Transmission
NOTE: All component dimensions given in U.S. inches.
1 inch = 25.4 mm
19
Page 20
TILLER - - MODEL NUMBER MC550 (96083000300)
HANDLE, WHEEL, AND DEPTH STAKE
4
2
3
1
7
5
8
6
21
20
19
17
14
15
13
16
22
17
23
9
23
10
5
10
5
18
11
12
18
17
19
22
Handles-Wheels-Depth Stake_1.ai
20
21
20
Page 21
TILLER - - MODEL NUMBER MC550 (96083000300)
HANDLE, WHEEL, AND DEPTH STAKE
KEY PART
NO. NO. DESCRIPTION
1 430579X428 Console Tiller Handle
2 165787 Grip Handle
3 431332 Assembly Handle Column
4 72010520 Bolt 5/16 - 18 x 2.50
5 189713X428 Knob Wing
6 425091 Lever Control Tine
7 12000059 Retainer Ring
8 431762 Pin Pivot
9 424190 Handle Lower
10 425398 Plug Snap In
11 432521 Weldment Transport Arm
12 4921H Clip Hairpin
13 421342 Stake Depth
14 326J Pin Clevis
15 72110610 Bolt 3/8 - 16 x 1-1/4
16 74780640 Screw Hex Head 3/8 - 16 x 2.5
17 73900600 Nut Lock Flg 3/8 - 16 unc
18 72140536 Bolt 5/16 - 18 x 4.5
19 193850X421 Wheel
20 19171416 Washer 17/32 x 7/8 x 16 Ga.
21 121117X Bolt Shoulder "A" 2.28 " B" 1.53
22 421345 Bracket Wheel
23 19111216 Washer 11/32 x 3/4 x 16 Ga.
NOTE: All component dimensions given in U.S. inches.
1 inch = 25.4 mm
21
Page 22
LIMITED WARRANTY
The Manufacturer warrants to the original consumer purchaser that this product as manufactured is free from defects in materials and work man ship. For a period of two (2) years from date of purchase by the original consumer purchaser, we will repair or
replace, at our option, without charge for parts or labor incurred in replacing parts, any part which we find to be defective due
to materials or workmanship. This Warranty is subject to the following limitations and exclusions.
1. This warranty does not apply to the engine, transaxle/transmission components, battery (except as noted below) or components parts thereof. Please refer to the applicable manufacturer's warranty on these items.
2. Transportation charges for the movement of any power equipment unit or attachment are the responsibility of the pur chaser. Transportation charges for any parts submitted for replacement under this warranty must be paid by the purchaser unless such return is requested by the manufacturer.
3. Battery Warranty: On products equipped with a Battery, we will replace, without charge to you, any battery which we find
to be defective in manufacture, during the first ninety (90) days of ownership. After ninety (90) days, we will exchange the
Battery, charging you 1/12 of the price of a new Battery for each full month from the date of the original sale. Battery must
be maintained in accordance with the instructions furnished.
4. The Warranty period for any products used for rental or commercial purposes is limited to 90 days from the date of original
purchase.
5. This Warranty applies only to products which have been properly assembled, adjusted, operated, and main tained in ac cor dance with the instructions furnished. This Warranty does not apply to any product which has been subjected to alteration, misuse, abuse, improper assembly or installation, delivery damage, or to normal wear of the product.
6. Exclusions: Excluded from this Warranty are belts, blades, blade adapters, normal wear, normal adjustments, stan dard
hardware and normal maintenance.
7. In the event you have a claim under this Warranty, you must return the product to an authorized service dealer.
Should you have any unanswered questions concerning this Warranty, please contact:
HOP
Outdoor Products Customer Service Dept.
1030 Stevens Creek Road
Augusta, GA 30907 USA
giving the model number, serial number and date of purchase of your product and the name and address of the authorized
dealer from whom it was purchased.
THIS WARRANTY DOES NOT APPLY TO INCIDENTAL OR CONSEQUENTIAL DAMAGES AND ANY IMPLIED WAR RAN TIES ARE LIMITED TO THE SAME TIME PERIODS STATED HEREIN FOR OUR EXPRESSED WARRANTIES. Some areas
do not allow the limitation of consequential damages or limitations of how long an implied Warranty may last, so the above limitations or exclusions may not apply to you. This Warranty gives you specific legal rights, and you may have other rights which
vary from locale to locale.
This is a limited Warranty within the meaning of that term as defined in the Magnuson-Moss Act of 1975.
In Canada contact:
HOP
5855 Terry Fox Way
Mississauga, Ontario
L5V 3E4
22
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