MTD 21AS122R799 Owner's manual

Category
Mini tillers
Type
Owner's manual

This manual is also suitable for

Operator's Manuam
2-Cycle
MINI-TILLER & CULTIVATOR
With Edger Attachment
Mode[ No. 316.29256
CAUTION: Before using
this product, read this
manual and follow a[[
safety rules and operating
instructions.
Espahoi, p. 19
Sears, Roebuck and Co., Hoffman Estates, [L 60179, U.S.A.
Visit our website: www.sears.com/craftsman
P/N 769-01154 (2/04)
PRINTED IN USA
TABLE OF CONTENTS
Warranty ................................. 2
Service Information ......................... 2
Rules for Safe Operation ..................... 3
Know Your Unit ............................ 6
Assembly Instructions ....................... 7
Oil and Fuel Information ...................... 9
Starting/Stopping Instructions ................ 10
Operating Instructions ...................... 11
Maintenance and Repair Instructions ........... 12
Cleaning and Storage ....................... 15
Troubleshooting Chart ...................... 16
Specifications ............................. 17
EPA Warranty Information ................... 18
Parts List ................................ 35
Repair Protection Agreement .... Inside Back Cover
Service Numbers ................... Back Cover
Full Two-Year Warranty on Craftsman Mini-Tiller and Cultivator
For two (2) years from the date of purchase, if this Craftsman Equipment is maintained, hbricated, and tuned up
according to the instructions to the operator's manual, Sears will repair or replace free of charge any parts found to be
defective in material or workmanship. Warranty service is available free of charge by returning Craftsman equipment to
your nearest Sears Service Center. In-home warranty service is avaihble but a trip charge will apply. This Warranty
applies only while this product is in the United States.
This Warranty does not cover:
Expendable items which become worn during normal use, such as spark plugs, air cleaners, belts, and oil filters.
Tire replacement or repair caused by punctures from outside objects, such as nails, thorns, stumps, or glass.
Repairs necessary because of operator abuse, including but not limited to, damage caused by objects, such as stones
or metal debris, oversized stock, impacting objects that bend the frame or crankshaft, or over-speeding the engine.
Repairs necessary because of operator negligence, including but not limited to, electrical and mechanical damage
caused by improper storage, failure to use the proper grade and amount of engine oil, or faihre to maintain the
equipment according to the instructions contained in the operator's manual.
Engine (fuel system) cleaning or repairs caused by fuel determine to be contaminated or oxidized (stale), In general,
fuel should be used within 30 days of its purchase date.
Equipment used for commercial or rental purposes.
TO LOCATE THE NEAREST SEARS SERVICE CENTER OR TO SCHEDULE SERVICE, SIMPLY CONTACT SEARS AT
1-800-4-MY-HOML ,
This warranty gives you specific legal rights and you may also have other rights, which vary from state to state.
CALiFORNiA PROPOSiTiON 65 WARNING
THE ENGINE EXHAUST FROM THIS
PRODUCT CONTAINS CHEMICALS
KNOWN TO THE STATE OF CALiFORNiA
TO CAUSE CANCER, BIRTH DEFECTS
OR OTHER REPRODUCTIVE HARM.
SPARK ARRESTOR NOTE
NOTE: For users on U.S. Forest Land and in the
states of California, Maine, Oregon and Washington.
All U,S. Forest Land and the state of California (Public
Resources Codes 4442 and 4443), Oregon and
Washington require, by law that certain internal
combustion engines operated on forest brush and/or
grass-covered areas be equipped with a spark arrestor,
maintained in effective working order, or the engine be
constructed, equipped and maintained for the prevention
of fire. Check with your state or local authorities for
regulations pertaining to these requirements, Failure to
follow these requirements could subject you to liability or
a fine. This unit is factory equipped with a spark
arrestor. If it requires replacement, ask your LOCAL
SERVICE DEALER to install the Accessory Part
#182747 Spark Arrestor Kit.
Thepurposeofsafetysymbolsistoattractyour
attentionto possibledangers,Thesafetysymbols,
andtheirexplanations,deserveyourcarefulattention
andunderstanding.Thesafetywarningsdonotby
themselveseliminateanydanger,Theinstructionsor
warningstheygivearenotsubstitutesforproper
accidentpreventionmeasures,
SYMBOL MEANING
SAFETY ALERT: Indicates
danger,
warning or caution. Attention is required in
order to avoid serious personal injury. May
be used in conjunction with other symbols
or pbtographs.
NOTE: Advises you of information or instructions vital to
the operation or maintenance of the equipment.
Read the Operator's Manual(s) and follow all
warnings and safety instructions.
Failure to do so can result in serious injury to the
operator and/or bystanders.
SYMBOL MEANING
DANGER: Failure to obey a
safety warning will
result in serious injury to yourself or to
others. Always follow the safety precautions
to reduce the risk of fire, electric shock and
personal injury,
WARNING: Fa,ureto obey a
safetywarning can
resultininjurytoyourselfand others,
Always followthe safetyprecautionsto
reduce the riskoffire,electricshock and
personal injury,
, Failure to obey a
safety warning may
result in property damage or personal injury
to yourself or to others, Always follow the
safety precautions to reduce the risk of fire,
electric shock and personal injury,
, IMPORTANT SAFETY INSTRUCTIONS ,,
READ ALL INSTRUCTIONS
BEFORE OPERATmNG
WARNING: When using the unit,
you must follow the
safety rules. Please read these instructions
before operating the unit in order to ensure
the safety of the operator and any bystanders,
Please keep these instructions for later use,
Read the instructions carefully, Be familiar with the
controls and proper use of the unit.
Do not operate this unit when tired, iii, or under the
influence of alcohol, drugs, or medication,
Children and teens under the age of 15 must not use
the unit, except for teens guided by an adult.
All guards and safety attachments must be installed
properly before operating the unit,
Inspect the unit before use. Replace damaged parts,
Check for fuel leaks. Make sure all fasteners are in
place and secure, Replace parts that are cracked,
chipped, or damaged in any way, Do not operate the
unit with loose or damaged parts,
Carefully inspect the area before starting the unit,
Remove all debris and hard or sharp objects such as
glass, wire, etc,
Be aware of the risk of injury to the head, hands and
feet,
Clear the area of children, bystanders, and pets. At a
minimum, keep all children, bystanders, and pets
outside a 50 feet (15 m,) radius; there still may be a
risk to bystanders from thrown objects, Bystanders
should be encouraged to wear eye protection, If you
are approached, stop the unit immediately,
Squeeze the throttle control and check that it returns
automatically to the idle position, Make all adjustments
or repairs before using unit.
SAFETY WARNmNGS FOR GAS UNITS
WARNmNG: Oaso,ne shighly
flammable, and its
vapors can explode if ignited, Take the
following precautions:
Store fuel only in containers specifically designed and
approved for the storage of such materials.
Avoid creating a source of ignition for spilled fuel. Do
not start the engine until fuel vapors dissipate.
Alwaysstoptheengineandallowittocod beforefilling
thefueltank.Neverremovethecapofthefueltank,or
addfuel,whentheengineishot.Neveroperatetheunit
withoutthefuelcapsecurelyinplace.Loosenthefuel
tankcapslowlytorelieveanypressureinthetank.
Mixandaddfuelinadean,well-ventilatedoutdoorarea
wheretherearenosparksorflames.Slowlyremovethe
fuelcaponlyafterstoppingengine.Donotsmokewhile
fuelingormixingfuel.Wipeupanyspilledfuelfromthe
unitimmediately.Alwayswipeunitdrybeforeusing.
Movetheunitatleast30feet(9.1m)fromthefueling
sourceandsitebeforestartingtheengine.Donot
smokeorallowsparksandopenflamesnearthearea
whileaddingfueloroperatingtheunit.
WHmLE OPERATmNG
Never start or run the unit inside a closed room or
building. Breathing exhaust fumes can kill. Operate
this unit only in a well ventilated outdoor area.
Wear safety glasses or goggles that are marked as
meeting ANSI Z87.1-1989 standards. Also wear
ear/hearing protection when operating this unit. Wear
a face or dust mask if the operation is dusty. Long
sleeve shirts are recommended.
Wear heavy, long pants, boots and gloves. Do not
wear loose clothing, jewelry, short pants, sandals or
go barefoot. Secure hair above shoulder level.
This unit has a clutch. The tines remains stationary
when the engine is idling. If it does not, have the unit
adjusted by an authorized service technician.
Be sure the tines are not in contact with anything
before starting the unit.
Use the unit only in daylight or good artificial light,
Avoid accidental starting. The operator and unit must
be in a stable position while starting. See
Starting/Stopping Instructions.
Use the right tool. Only use this tool for the purpose
intended.
Use extreme caution when reversing or pulling the unit
towards you.
Do not overreach. Always keep proper footing and
balance. Take extra care when working on steep
slopes or inclines.
Always hold the unit with both hands when operating.
Keep a firm grip on the grips.
Keep hands, face, and feet at a distance from all
moving parts. Do not touch or try to stop the tines
when they are rotating.
Do not touch the engine or muffler. These parts get
extremely hot from operation. They remain hot for a
short time after you turn off the unit.
Do not operate the engine faster than the speed
needed to cultivate. Do not run the engine at high
speed when you are not cultivating.
Always stop the engine when cultivating is delayed or
when walking from one cultivating location to another.
If you strike or become entangled with a foreign
object, stop the engine immediately and check for
damage. Do not operate before repairing damage. Do
not operate the unit with loose or damaged parts.
Stop and switch the engine to off for maintenance,
repair, or to install or remove the tines.
Use only original equipment manufacturer
replacement parts and accessories for this unit. These
are available from your authorized service dealer. Use
of any unauthorized parts or accessories could lead to
serious injury to the user, or damage to the unit, and
void your warranty.
Keep unit clean of vegetation and other materials.
They may become lodged between the tines and
guard.
To reduce fire hazard, replace faulty muffler and spark
arrestor, keep the engine and muffler free from grass,
leaves, excessive grease or carbon build up.
OTHER SAFETY WARNmN(:;S
Never store the unit, with fuel in the tank, inside a
building where fumes may reach an open flame or
spark,
Allow the engine to cool before storing or transporting.
Be sure to secure the unit while transporting.
Store the unit in a dry area, locked up or up high
to prevent unauthorized use or damage, out of the
reach of children.
Never douse or squirt the unit with water or any other
liquid. Keep handles dry, clean and free from debris.
Clean after each use. See the Cleaning and Storage
instructions.
Keep these instructions. Refer to them often and use
them to instruct other users. If you loan someone this
unit, also loan them these instructions.
SAVE THESE
SAFETY AND _NTERNAT_ONAL SYMBOLS
This operator's manuaHdescribes safety and internationaH symboHs and pictographs that may appear on this product.
Read the operator's manuaHfor compHete safety, assembHy, operating and maintenance and repair information.
SYMBOL MEANING SYMBOL
_ SAFETY ALERT SYMBOL
Indicates danger, warning, or
caution. May be used in conjunction
with other symboHs or pictographs.
,' WARNING - READ OPERATOR'S
MANUAL
Read the Operator's ManuaH(s)and
follow aHHwarnings and safety
instructions. FaiHureto do so can
resuHtin serious injury to the
operator and/or bystanders.
I
MEANING
,, THROWN OBJECTS AND
ROTATING CUTTER CAN CAUSE
SEVERE iNJURY
WARNmNG: Donot
operate without the proper guards in
pHace.Keep away from the rotating
tines.
', ON/OFF STOP CONTROL
ON / START / RUN
WEAR EYE AND HEARING
PROTECTION
WARNmNG: Thrown
objects and Houdnoise can cause
severe eye injury and hearing Hoss.
Wear eye protection meeting ANSI
Z87.1-1989 standards and ear
protection when operating this unit.
Use a full face shield when needed.
', KEEP BYSTANDERS AWAY
WARNING: KeepaUU
bystanders,especiaHHychiHdrenand
pets,atHeast50 feet(I5 m.)fromthe
operatingarea.
UNLEADED FUEL
Always use clean, fresh unleaded fuel.
', OIL
Refer to operator's manuaHfor the
proper type of oiH.
0
ON/OFF STOP CONTROL
OFF or STOP
', HOT SURFACE WARNING
Do not touch a hot muffler or
cyHinder. You may get burned. These
parts get extremeHy hot from
operation. When turned off they
remain hot for a short time.
GARDEN CULTIVATORS-
ROTATING TINES CAN CAUSE
SEVEREINJURY
WARNING: Stop the
engine and aHHowthe tines to stop
before instaHHingor removing tines,
or before cHeaning or performing any
maintenance. Keep hands and feet
away from rotating tines.
KNOW YOUR PRODUCT
CuHtivating sod and Hightto medium soiH
CuHtivating in garden areas, around trees, etc.
Edging
STOP/OFF (0)
Handgrip
Throttme
Controm
Handlebar
On/Off Stop
Controm FuemCap
START/ON (J)
Primer Bumb
\
EZ Fire TM Lever
/
, \
\
Starter Rope Grip
Transport
Grip
Nandmebar
Knob
Transport Roller
Assembly
Edger
Wheel
Muffler
Edger
Blade
ASSEMBLING THE UNiT
Before operating, position the unit's handlebars.
NOTE: You may also need to reposition the roller height
before using the cultivator. Refer to the Adjusting
Tine Depth section.
Begin by carefully unpacMng the contents and maMng
sure that nothing is damaged.
POSiTiONiNG THE HANDLEBARS
1. Loosen the two knobs on the inside of the
handlebars (Fig. 1).
2. With the unit upright, swing the handlebars up into
the operating position (Fig. 1).
NOTE: Take care not to pinch the throttle cable or
switch wires when positioning the handlebar.
3. Tighten the knobs to secure the handlebars in place
(Fig. 2).
NOTE: Do not over-tighten the knobs,
4.
Readjust the throttle cable and switch the wires so
they are smooth and tight against the handlebar
assembly. This will help prevent them from catching
or snagging during normal operation.
NandJebar
Knobs
Handmebar
Knobs
Fig. 1
Home
Bott
Nandmebar
Knob
" _ NandBebars
F_g. 2
INSTALLING THE TRANSPORT ROLLER
ASSEMBLY
If the roller assembly is not installed, or if you ever need
to remove or reinstall it, perform the following
instructions:
WARNING: Toavoid njuryfrom
the tines, wear
heavy gloves and a long sleeve shirt when
installing the roller assembly.
WARNING: Topreventser ous
personal injury, the
roller assembly must be installed when
operating the unit.
1. With the unit on its side, place the transport roller
assembly on the underside of the tine guard (Fig. 3).
Guard
Roller
Assembly
Wing Nuts &
Lock Washers
F_g. 3
2, InstaHHa carriage bolt through each of the slotted
holes in the roller bracket and into the tine guard,
3, On the TOP side of the tine guard, install a Hock
washer and a wing nut onto each of the bolts (Fig. 3),
4, Make sure the square shoulder of the bolts is pushed
through the slotted holes in the roller bracket, Tighten
the wing nuts (Fig. 4),
NOTE: Do not over-tighten the wing nuts, Loosen the
wing nuts to adjust roller height.
\
\
up
®
Transport
Relier
Assembmy
ADJUSTmNG TmNE DEPTH
Tine adjustment will vary depending on the type of soil
being cuItivated and how it wiII be used, GeneraIIy,
adjusting the tines to break the soiI 4 to 6 inches is
recommended for most gardens, Adjust the tines as
follows:
1, Stop the engine and disconnect the spark plug wire,
2, Loosen (do not remove) the two wing nuts on the
tine guard (Fig, 5),
3, Slide the roller bracket assembly down for shallower
penetration, and up for deeper tine penetration,
4, Once the tines are in the desired position, tighten the
wing nuts, making sure that the carriage bolts are
seated properly through the bracket,
5, If the tine depth is incorrect, repeat steps 2 to 4,
6, Reconnect the spark plug wire and continue use,
ATTACHmNG THE EDGER WHEEL AND BLADE
To convert the mini-tiller cultivator to an edger, proceed
as follows:
1, Push the On/Off switch to Off (O) position to stop
engine and tines and disconnect spark plug to avoid
accidental starting,
NOTE: It may be necessary to Jaythe mini-tiller back in a
horizontal position on a flat level surface with the
upper handle touching the ground,
2, Remove the click pin from each end of the tine shaft
and slide the tines off the shaft.
3, Slide the edger wheel, with the hub facing inward,
onto the right side of the tine shaft and secure with
the click pin in the inside hole (Fig, 6).
4, Slide the edger blade with the hub facing out onto
the Heftside of tine shaft and secure with the click pin
in the inside hole (Fig. 6),
5, Guide the edger blade along a flowerbed, sidewalk,
or driveway with the edger wheel along the outside
edge, Use the edger guide line to line up edger blade,
Edger Guide
Line
Edger Wheel
Edger Blade
F_g. 6
OiL AND FUEL MJXH_G H_STRUCTJONS
Old and/or improperly mixed fuel are the main reasons
for the unit not running properly. Be sure to use fresh,
clean unleaded fuel. Follow the instructions carefully for
the proper fuel/oil mixture.
Definition of Bmended Fuels
Today's fueHsare often a bHendof gasoHine and
oxygenates such as ethanol, methanol, or MTBE (ether).
Alcohol-blended fuel absorbs water. As little as 1%
water in the fue[ can make rue[ and oi[ separate, it forms
acids when stored. When using alcohol-blended fuel,
use fresh rue[ (Hessthan 60 days oHd).
Using Bmended Fuems
[f you choose to use a blended fuel, or its use is
unavoidable, follow recommended precautions:
Always use the fresh fuel mix explained in your
operator's manual
Always agitate the fuel mix before fueling the unit
, Drain the tank and run the engine dry before storing
the unit
Using FuemAdditives
The bottle of 2-cycle oil that came with your unit
contains a fuel additive which will help inhibit corrosion
and minimize the formation of gum deposits. It is
recommended that you use Craftsman 2-cycle oil with
this unit.
if Craftsman 2-cycle oil is unavailable, use a good 2-
cycle oil designed for air-cooled engines along with a
fuel additive, such as STA-B[L" Gas Stabilizer or an
equivalent. Add 0.8 oz. (23 ml.) of fuel additive per gallon
of fuel according to the instructions on the container.
NEVER add fuel additives directly to the unit's fuel tank.
. For proper engine
operation and
maximum reliability, pay strict attention to
the oil and fuel mixing instructions on the
2-cycle oil container. Using improperly mixed
fuel can severely damage the engine.
Correct Fuel Mi×ture
Thoroughly mix the proper ratio of 2-cycle engine oil
with unleaded gasoline in a separate fuel can. Use a 40:1
fuel/oil ratio. Do not mix them directly in the engine fuel
tank. See the Fuel Mixture Table for specific gas and oil
mixing ratios.
NOTE: One gallon (3.8 liters) of unleaded gasoline mixed
with one 3.2 oz. (95 ml.) bottle of
2-cycle oil makes a 40:1 fuel/oil ratio.
FUEL MIXTURE TABLE
÷
UNLEADED GAS 2 CYCLE OiL
1 GALLON US 3.2FL OZ.
(3.8 LITERS) (95ram)
1 LITER 25 mm
_'I[X[NG RATIO - 40:1
WARNING: Gaso,ne
extremely,
flammable. Ignited Vapors may explode.
Always stop the engine and allow it to cool
before filling the fuel tank. Do not smoke
while filling the tank. Keep sparks and open
flames at a distance from the area.
WARNING: Removefuel cap
slowly to avoid injury
from fuel spray. Never operate the unit
without the fuel cap securely, in place.
WARNING: Add fuelina dean,
wellventilated
outdoor area,Wipe up any spilledfuel
until fuel vapors dissipate.
NOTE: Dispose of the old fuel/oil mix in accordance to
Federal, State and Local regulations.
FiLLiNG THE FUEL TANK
Make sure the cultivator is in a horizontal position when
filling or adding fuel to the tank.
Rg. 7
WARNING: Operateth,sun,tonly,na
vvell-ventilatedoutdoor
area,Carbon monoxide exhaustfumes can be lethalin
a confinedarea,
WARNING: Avoid accidental starting.
Make sure you are in the
starting position when pulling the starter rope
(Fig. 10). To avoid serious injury, the operator and unit
must be in a stable position while starting.
STARTING iNSTRUCTiONS
2,
ii " 5.
ii ii
Mix gas with oil. Fill fuel tank with fueFoil mixture.
See Oil and Fuel Mixing Instructions.
Make sure the On/Off Stop Control is in the ON [m]
position (Fig. 8).
Fully press and release the primer bulb 10 times,
slowly. Some amount of fuel should be visible in the
primer bulb and fueHHines(Fig. 9). [f you can't see
fuel in the bulb, press and release the bulb as many
times as it takes before you can see fuel in it.
TM
Push the blue EZ Fire Lever towards the primer
bulb until it clicks and locks into place (Fig. 9).
Lay the unit on the ground horizontally, with the ends
of the handles resting on the ground (Fig. 10).
Put your free hand on the fuel tank to stabilize the
unit. With your other hand, pull the starter rope out
with a controlled and steady motion until the
engine attempts to start. Repeat until the engine
starts.
NOTE: The unit uses the Incredi-PulF M starting system,
which significantly reduces the effort required to
start the engine. You must pull the starter rope out
far enough to hear the engine attempt to start.
There is no need to pull the rope briskly-- there is
no harsh resistance when pulling. Be aware that
this starting method is w_stly different from (and
much easier than) what you may be used to.
7. When the engine starts, squeeze the throttle control
for 15 to 30 seconds. This will warm up the unit. The
EZ Fire TMLever will click off automatically when
you squeeze the throttle control.
............mFoooThe engine does not start, go back to step 3.
................mFoooThe engine stops while you are squeezing the
throttle, go back to step 4.
mFoooThe engine stops before you squeeze the throttle
control, hold the throttle control and pull the starter
rope until the trimmer starts.
NOTE: If you are having trouble starting the unit or are
operating in extreme temperatures (below 40° F,
above 90° F), refer to the Troubleshooting section.
STOPPING iNSTRUCTiONS
1. Release your hand from the throttle control. Allow the
engine to cool down by idling,
2. Put the On/Off Stop Control in the OFF (O) position.
10
OFF Co)
@
ON (I) Throttle
ControJ
F_g.8
Primer
Bulb
F_g.9
EZ FireTM
Lever
Starting Position
Fig. 10
OPERATmNG TraPS
WARNmNG: Dress propedy to
reduce the riskof
injury when operating this unit. Do not
wear HoosecHotNng orjeweHry. Wear eye
and ear/hearing protection. Wear heavy
Hongpants, boots and gHoves. Do not wear
short pants, sandaHs or operate barefoot.
Move the cultivator to the work area prior to starting the
engine. Transport the cultivator by pushing it on its
roller wheel or by carrying it by the transport grip.
WARNmNG: Toprevent serious
persona] injury,
never pick-up or carry the unit while the
engine is running.
2. Start the unit by foHHowingthe Starting Instructions
3. With the engine running and the tines off the ground,
depress the throttle control to increase the engine speed.
4. HoHding both of the handHebar grips firmHy,showily
Howerthe cuHtivator untiHthe tines make contact with
the ground (Fig. 11).
5. As cuHtivating action begins, puHHback on the
cuHtivator so that the tines can penetrate the ground.
6. Once the ground has been broken, continue at a
moderate pace untiHyou are famiHiarwith the controHs
and the handHingof the cuHtivator.
7. To improve the depth of cuHtivation, puHHback on the
unit as it moves forward to drive the tines deeper
into the ground.
8_
WARNING: Toprevent serious
personaH injury, use
extreme caution when reversing
or pulling the unit towards you.
If the tines are digging too deep or not deep enough,
adjust them according to Adiusting Tine Depth.
Transport
Grip
Fig, 11
TRANSPORTING THE UNIT
WARNING: Topreventser ous
personaH injury,
aHways stop the engine when operation is
deHayed or when transporting the unit from
one Hocation to another
1. Stop the engine.
2. Slide the roller bracket assembly all the way down.
3. TiHtthe unit back untiHthe tines dear the ground.
4. Push or puHHthe unit to the next Hocation.
5. If you need to move the unit over Hongdistances, use
11
MAmNTENANCE SCHEDULE
Perform these required maintenance procedures at the
frequency stated in the table. These procedures should
also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require
special tools or skills. If you are unsure
about these procedures, take your unit to a
Sears Parts & Repair center or other quali-
fied service dealer.
WARNING: To prevent serious
inJury, never perform
maintenance or repairs with unit running.
Always service and repair a cool unit.
Disconnect the spark plug wire to ensure that
the unit cannot start.
NOTE: Maintenance, replacement, or repair of the emission
contro[ devices and system may be performed by
any non-road engine repair establishment or a
Sears parts and repair service center.
[n order to assure peak performance of your engine,
inspection of the engine exhaust port may be necessary
after 50 hours of operation. [f you notice lost RPM, poor
performance or general lack of acceleration, this service
may be required. [f you feel your engine is in need of this
inspection, refer service to a Sears Parts & Repair center
or other qualified service dealer. DO NOT attempt to per-
form this process yourself as engine damage may result
from contaminants involved in the cleaning process for
the port.
FREQUENCY MAINTENANCE REQUIRED REFER TO
Before starting engine Fill fuel tank with fresh fuel mix Page 9
Every 10 hours Clean and re-oil air filter Page 13
Check and clean spark arrestor Page 14
Every 25 hours
Check spark plug condition and gap Page 15
Inspect exhaust port and spark arrestor screen for clogging or Page 14
Every 50 hours obstruction to assure maximum performance levels
TJNE REMOVAL AND REPLACEMENT
WARNING: Toprevent serious
injury, always wear
heavy gloves when handling the tines.
1. Put the On/Off Stop Control in the STOP (O) position
and disconnect the spark plug boot from the plug.
NOTE: It may be necessary to lay the cultivator back in a
horizontal position on a flat level surface with the
handles touching the ground.
2. Remove the click pin from each end of the tine shaft.
Slide the tines off of the shaft (Fig. 12a).
3. Clean and oil the shaft.
4. When you are reinstalling tines, lay out the tines and
compare them to those shown in Figure 12b. Note
specifics about each tire: its hub, curvature and
lettering ("A" or "B"). This will help make sure that
you are placing the correct tines unthe correct order.
NOTE: If you look closely, you can see a slight curvature
in the tire tips. These curves should point toward
the front of the cultivator when the tines are
installed. Figure 12b shows the curve in each tire.
5. Using Figures 12a and 12b for reference, slide on the
new tines with the hubs facing outward.
"A" TiRe
Cultivator
Front
" TiRe
TiRe
Click Pin
Hubs
Fig. 12a
Hubs oR back side
Hubs
6_
the cultivator from the front.
Secure the new tines to the shaft with click pins. It
may be necessary to wash the dirt off the tines and
shaft to help during this entire process.
Cultivator
Front
Fig. 12b
"A" Time
12
AIR FILTER MAINTENANCE
Removing the Air Filter/Muffler Cover
WARNING: Toavoidserious
personal injury,
always turn the unit off and allow it to cool
before you clean or service it.
1.
Remove the four (4) screws secuhng the air
filter/muffler cover (Fig. 13). Use a flat blade or # T20
Torx bit screwdriver.
2. Pull the cover from the engine. Do not force.
ScFews
EZ FireTM
Lever
Screws
/
Air Filter
J
_ Inside Muffler
Cover
Fig. 14
Fig. 15
Fig. 13
Cleaning the Air Filter
Clean and re-oil the ak filter every 10 hours of operation.
[t is an important item to maintain. Failure to maintain the
air filter will VOID the warranty.
1. Remove the air filter/muffler cover. Refer to the
Removing the Air filter/Muffler Cover section.
2. Remove the air filter from inside the air filter/muffler
cover (Fig. 14).
3. Wash the filter in detergent and water (Fig. 14). Rinse
the filter thoroughly. Squeeze out excess water.
Allow it to dry completely.
4. Apply enough SAE 30 oil to lightly coat the filter (Fig. 15).
5. Squeeze the filter to spread and remove extra oil (Fig. 15).
6. Replace the air filter inside the muffler cover (Fig. 14).
NOTE: Operating the unit without the air filter and cover
assembly will VOID the warranty.
Reinstalling the Air filter/Muffler Cover
1. Place the air filter/muffler cover over the back of the
carburetor and muffler.
2. Insert the four (4) screws into the holes in the air
filter/muffler cover (Fig. 13) and tighten. Use a flat
blade or # T20 Torx bit screwdriver. Do not over
tighten. Do not force.
SPARK ARRESTOR MAINTENANCE
1. Remove the air filter/muffler cover. Refer to
Removing the Air Filter/Muffler Cover.
2. Locate the muffler front and the two (2) bolts securing
it to the engine (Fig. 16). Remove the two (2) bolts
using a flatblade screwdriver or 5/16-inch socket or
nut driver. Pull the muffler off of the engine.
3. Turn the muffler over to the back side and locate the
exhaust gasket. Remove the muffler gasket from the
muffler (Fig. 16).
NOTE: Ifthe exhaust gasket is torn or damaged, replace it
with a new gasket before you reassemble the muffler.
4. Using a small flatblade screwdriver, carefully pry up
the spark arrestor from the recessed hole (Fig. 17).
Remove the spark arrestor from the muffler.
5. Clean the spark arrestor with a wire brush. Replace it if it
is damaged or if it can't be cleaned thoroughly (Fig. 17).
6. Reinstall the spark arrestor by pressing it into the
recessed hole on the muffler's back side. Make sure
it fits tightly against the muffler and is not raised up.
7. Place the exhaust gasket against muffler's back side.
Align the gasket bolt holes with the bolt holes in the
muffler. While holding exhaust gasket in place, insert
the bolts into the muffler's front side (Fig. 16).
13
8. Place the muffler (with the exhaust gasket in piace and
bolts inserted}, against the engine, aIigning the bolt
holes. Tighten the boJtsto secure the muffler to the
engine. If using a torque wrench, torque to:
80-90 inAb. (9-10.2 N_rn)
9. Reinstall the air filter/muffler cover.
WARNING: ufthemufflerisnot
tightened securely', it
could fall off causing damage to the unit and
oossible serious personal injury.
Spark Exhaust
Arrestor Gasket
Muffler - Front Side Muffler - Back Side
Fig. 16
Spark Arrestor
Flatbmade
Screwdriver
Muffler - Back Side
\
Spark
Arrestor
Fig. 17
CARBURETOR ADJUSTMENTS
The engine's idle speed adjuster is adjustable through
the air filter/muffler cover (Fig 18).
NOTE: Careless adjustments can seriously damage your
unit. A Sears Parts & Repair center or other
qualified service dealer should make carburetor
adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason
for the unit not running properly. Drain and refill the tank
with fresh, properly mixed fuel prior to making any
adjustments. Refer to Off and Fuel Information.
Clean Air Filter
The condition of the air filter is important to the operation
of the unit. A dirty air filter will restrict air flow and
change the air/fuel mixture. This is often mistaken for an
out of adjustment carburetor. Check the condition of the
air filter before adjusting the idle speed adjuster. Refer to
Air Filter Maintenance.
14
Adjust mdle Speed Adjuster
The unit will still run
during idle speed
adjustments. Wear protective clothing and
observe all safety instructions to prevent
serious personal injury.
If after checking the fuel mixture and cleaning the air
filter the engine still will not idle, adjust the idle speed
screw as follows:
1. Start the engine and let it run for about 2-3 minutes
at a high speed (full throttle) to warm up. Refer to the
Starting/Stopping Instructions.
NOTE: Ensure the tines are not in contact with the
ground when adjusting the idle.
2. Release the throttle control and let the engine idle. If
the engine stops, insert a small phillips or flat blade
screwdriver into the hole in the muffler cover (Fig. 18).
Turn the idle speed screw clockwise 1/8 of a turn at
a time (as needed) until the engine idles smoothly.
NOTE: The tines shouJd not rotate during engine idJe.
3. If the tines rotate when the engine idles, turn the idle
speed screw counterclockwise 1/8 of a turn at a
time (as needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter, and
adjusting the idle speed screw should solve most engine
problems. If not and all the following are true:
The engine will not idle
The engine hesitates or stalls on acceleration
There is a loss of engine power
Have the carburetor adjusted by a Sears Parts & Repair
center or other qualified service dealer.
[dmeSpeed Adjuster
Fig. 18
REPLACmNG THE SPARK PLUG
Use a Champion RDJ-7Y spark plug. The correct air gap
is 0.020 in. (0.5 mm). Remove the plug after every 25
hours of operation and check its condition.
1. Stop the engine and allow it to cool. Grasp the plug
wire firmiy and puii the cap from the spark piug.
2. Ciean dirt from around the spark piug. Remove the
spark piug from the cyiinder head by turning a 5/8 in.
socket counterciockwise.
3. Repiace cracked, fouled or dirty spark pIug. Set the air
gap at 0.020 in. (0.5 mm) using a feebr gauge (Fig. 19).
0.020 in,
(0.5 ram.)
Fig. 19
WARNING: Do not sand Mast,
scrape or clean
electrodes. Grit in the engine could damage
the cylinder.
4. Install a correctly-gapped spark plug in the cylinder
head. Turn the 5/8 in. socket clockwise until snug.
If using a torque wrench torque to:
110-120 in.qb. (12.3-13.5 N,m)
Do not over tighten.
CLEANmNG THE UNIT
Use a small brush to clean off the outside of the unit
and to keep the air vents free of obstructions.
Do not use strong detergents or petroleum based
cleaners, like kerosene. Some household cleaners
contain aromatic oils such as pine and lemon that
can damage the plastic housings or handles. Wipe
off any moisture with a soft cloth.
STORAGE
Never store a fueled unit where fumes may reach an
open flame or spark.
Allow the engine to cool before storing.
Store the unit in a locked up area to prevent
unauthorized use or damage.
Store the unit in a dry, well-ventilated area.
Store the unit out of the reach of children.
LONG TERM STORAGE
If you plan to store the unit for an extended time:
1. Drain all fuel from the fuel tank into a container. Do
not use fuel that has been stored for more than 60
days. Dispose of the old fuel in accordance to local
regulations.
2. Start the engine and allow it to run until it stalls. This
ensures that all fuel has been drained from the
carburetor.
3. Allow the engine to cool. Remove the spark plug and
put 1 oz. (30 ml) of high quality motor oil into the
cylinder. Pull the starter rope slowly to distribute the
oil. Reinstall the spark plug.
NOTE: Remove the spark plug and drain all of the oil
from the cylinder before attempting to start the
unit after storage.
4.
Thoroughly clean the unit and inspect for any loose
or damaged parts. Repair or replace damaged parts
and tighten loose screws, nuts or bolts. The unit is
ready for storage.
TRANSPORTmNG
, Allow the engine to cool before transporting.
° Secure the unit while transporting.
Drain the fuel tank before transporting.
° Tighten fuel cap before transporting.
MOVING THE UNIT
1. Allow the unit to cool before moving.
2. Loosen the knobs on the handlebar.
3. Fold the handlebars down as shown (Fig. 20).
Tighten the knobs.
Handlebar
4.
Fig. 20
Either carry the unit by the shaft tube grip or grasp
the center of the handlebar to use it as a carrying
handle.
After the unit has been moved, reposition the
handlebars and continue operation.
15
CAUSE
Empty fueHtank
Primer buHbwasn't pressed enough
Engine is flooded
OHdfueH
FouHedspark pHug
Mugged spark arrestor
EZ Fire Heverwasn't flipped/set
The outside temperature is bellow 40° F
The outside temperature is above 90° F
CAUSE
Air fiHteris pHugged
OHdfueH
Improper carburetor adjustment
CAUSE
OHdfueH
Improper carburetor adjustment
Mugged spark arrestor
CAUSE
OHdfueH
Improper carburetor adjustment
FouHedspark pHug
Mugged spark arrestor
CuHtivator tines bound with debris
ACTION
Fill fueHtank with new fueH
Press primer buHbfully and showily10 times
Squeeze the trigger and pull the starter rope
Drain gas tank and add fresh fuel
Replace or clean the spark plug
Clean or replace spark arrestor
Move lever to the starting position
Pull the starter rope up to 10-15 times
Squeeze the throttle control and pull the starter rope
ACTION
Replace or clean the air filter
Drain gas tank and add fresh fuel
Adjust according to the Carburetor Adjustments section
ACTLON
Drain gas tank and add fresh fuel
Take to a Sears Parts & Repair center or other qualified
service dealer for an adjustment
Clean or replace the air filter
Clean or replace spark arrestor
ACTION
Drain gas tank and add fresh fuel
Take to a Sears Parts & Repair center or other qualified
service dealer for an adjustment
Replace or clean the spark plug
Clean or replace spark arrestor
Stop the unit, switch the On/Off Stop Control to
STOP, clean and remove any debris binding the tines
CAUSE ACTION
Spark plug gap is too small/close Adjust gap to 0.020 inch (0.50 mm)
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest Sears Parts &
Repair center (1 800 4 M%HOME ®) or other qualified service dealer for an adjustment.
16
EngineType...........................................................................................................................................Air-Cooied,2-Cycie
Dispiacement .............................................................................................................................................................. 31 cc
Idie Speed RPM ......................................................................................................................................... 2,600-3,600 rpm
Operating RPM ................................................................................................................................................... 7,800+ rpm
Ciutch Type ......................................................................................................................................................... CentdfugaH
Ignition Type .......................................................................................................................................................... Electronic
On/Off Stop Control ....................................................................................................................................... Rocker Switch
Spark Plug Type .................................................................................................................................... Champion RDJ-7Y
Spark Plug Gap .................................................................................................................................. 0.020 inch (0.50 mm)
Lubrication ................................................................................................................................................... Fuel/Oil Mixture
Fuel/Oil Ratio .................................................................................................................................................................. 40:1
Carburetor ....................................................................................................................................... Diaphragm, All-Position
Starter ................................................................................................................................................................. hcredi-Pull
Muffler ..................................................................................................................................................... Baffled with Guard
Throttle ............................................................................................................................................................ Spring Return
Fuel Tank Capacity ................................................................................................................................. 14 ounces (415 ml)
Drive Shaft Tube .................................................................................................................................................. Steel Tube
Throttle Control ........................................................................................................................................ Finger-Tip Trigger
Cultivating Path Width (Maximum) ....................................................................................................... 9 inches (22,86 cm)
Cultivating Depth (Maximum) ................................................................................................................. 5 inches (12.7 cm)
Approximate Weight (no fuel) ......................................................................................................................... 26 lb. (12 kg)
_All specifications are based on the latest product information available at the time of printing. We reserve the right to
make changes at any time without notice.
17
EPA Emission ControJ Warranty Statement
Your Warranty Rights and Obligations
The Envkonmentd Protection Agency and Sears are pleased to explain the emission control system warranty on your
2002 and later small off-road engine, New small off-road engines must be designed, built and equipped to meet stringent
anti-smog standards, Ryobi must warrant the emission control system on your small off-road engine for the periods of
time listed below provided there has been no abuse, neglect or improper maintenance of your small off-road engine,
Your Emission control system may include parts such as the carburetor or fueNnjection system, the ignition system, and
catalytic converter, Also included may be hoses, belts, connectors and other emission-related assemblies,
Where a warrantable condition exists, Sears will repair your small off-road engine at no cost to you including diagnosis,
parts and labor,
The 2002 and later small off-road engines are warranted for two years, If any emission-related part on your engine is
defective, the part will be repaired or replaced by Sears.
Owner's Warranty Responsibilities
° As the small off-road engine owner, you are responsible for the performance of the required maintenance listed in your
operator's manual, Sears recommends that you retain all receipts covering maintenance on your small off-road engine,
but Sears cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all
scheduled maintenance,
As the small off-road engine owner, you should however be aware that Sears may deny you warranty coverage if your
small off-road engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications,
You are responsible for presenting your small off-road engine to a Sears authorized service center as soon as problem
exists, The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days,
If you have any questions regarding your warranty rights and responsibilities, you should call 1-800-4-MY-HOME,
Manufacturer's Warranty Coverage
, The warranty period begins on the date the engine or equipment is delivered to the retail purchaser,
The manufacturer warrants to the initial owner and each subsequent purchaser, that the engine is free from defects in
material and workmanship which cause the failure of a warranted part for a period of two years,
Repair and replacement of warranted part will be performed at no charge to the owner at an authorized Sears service
center, For the nearest location please contact Sears at: 1-800-4-MY-HOME,
, Any warranted part which is not scheduled for replacement, as required maintenance or which is scheduled only for
regular inspection to the effect of "Repair or Replace as Necessary" is warranted for the period, Any warranted part
which is scheduled for replacement as required maintenance will be warranted for the period of time up to the first
scheduled replacement point for that part,
The owner will not be charged for diagnostic labor which leads to the determination that a warranted part is defective,
If the diagnostic work is performed at an authorized Sears Service Center,
The manufacturer is liable for damages to other engine components caused by the failure of a warranted part still
under warranty,
° Failures caused by abuse, neglect or improper maintenance are not covered under warranty,
The use of add-on or modified parts can be grounds for disallowing a warranty claim, The manufacturer is not liable to
cover failures of warranted parts caused by the use of add-on or modified parts,
, In order to file a claim, go to your nearest authorized Sears Service Center, Warranty service or repairs will be provided
at all authorized Sears Service Centers,
Any manufacturer approved replacement p[art may be used in the performance of any warranty maintenance or repair
of emission related parts and will be provided without charge to the owner, Any replacement part that is equivalent in
performance or durability may be used in non-warranty maintenance or repair and will not reduce the warranty
obligations of the manufacturer,
° The following components are included in the emission related warranty of the engine, air filter, carburetor, primer, fuel
lines, fuel pick up/fuel filter, ignition module, spark plug and muffler,
18
ENGINE PARTS: MODEL MmNI-TILLER EDGER
2-CYCLE GAS
totem
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Part No.
753-1192
791-180350B
791-180351
753-04227
753-1194
753-04331
791-610675
791-181860
791-683974B
753-1196
791-684451
753-1208
753-04704
791-612134
753-04306
791-182612
791-181086
791-682039
791-145308
791-683065
791-181861
791-182064
791-182736
791-181525
753-04459
753-04286
753-04705
791-611061
791-181079
791-613103
791-181912
Description
Air Cleaner/Muffler Cover Assembly
(includes 2 & 38)
Air Cleaner Filter
Carburetor Mounting Screw Assembly
Choke Lever
Choke Plate
Carburetor Assembly (includes 7 & 18)
Carburetor Gasket
Carb Mount Screw
Primer and Hose Assembly
Carb Mount Assembly (includes 8 & 11)
Reed Assembly
Carburetor Mount Gasket
Crank Case Service Assembly
(includes 8 & 21)
Rear Mounting Pad
Fuel Tank Assembly (includes 16-18)
Fuel Cap Assembly
Fuel Return Line
Fuel Line Assembly
Front Mounting Pad
Shroud Assembly (includes 23)
Shroud Screw
Shroud Extension & Stand (includes 37)
Flywheel Assembly
Spacer
Recoil Pulley Assembly
Recoil Spring
Pulley Retainer Assembly
Rope Guide
Pull Handle
Rope
Housing Screw
Item Part No.
32 753-04706
33 791-182368
34 791-182369
35 791-153592
36 791-180098
37 791-181345
38 791-153597
39 753-04337
40 791-182880
41 791-610311B
42 791-182174
43 753-04159
44 791-182747
45 791-147575
46 753-04323
47 753-04367
48 753-1197
49 791-182723
50 791-611063
753-04134
753-1209
753-04707
791-181599
not shown
Description
Starter Housing Assembly
(includes 25-31 & 37)
Clutch Washer
Clutch Rotor Assembly
Clutch Drum Assembly
Clutch Cover Assembly (includes 37)
Cover Screw
Upper Clamp Assembly
Module Assembly (includes 50)
Wire Lead
Spark Plug
Muffler Assembly (includes 43-45)
Exhaust Gasket
Spark Arrestor
Muffler Mounting Bolt Assembly
Cylinder Assembly (includes 48 & 49)
Piston and Rod Assembly
Cylinder Gasket
Cylinder Bolt
Ground Tab
Engine Gasket Kit
Piston Ring
Short Block Assembly
(includes 10, 13, 21,41, 47-49)
Clutch Springs (Qty. 2)
35
\ \
\ \
\ '\
', \
\ \
\
\
CULTIVATOR AND BOOM PARTS
2-CYCLE GAS
item Part No,
1 791-182881
2 791-182882
3 791-182675
4 791-182676
5 791-182678
6 791-182899
7 791-182898
8 791-180943
9 791-181577
10 791-683295
11 791-181811
12 791-181812
13 791-181813
14 791-181814
15 791-181815
16 791-181575
17 791-182900
18 791-182681
19 791-147467
20 753-04266
21 753-04708
22 753-04796
23 753-04797
24 753-04798
25 753-04799
26 753-04075
27 753-04074
28 753-04073
29 753-04072
30 753-04071
31 753-04070
32 753-04069
33 753-04068
34 791-180288
35 791-182893
Description
Throttle Trigger and Cable Assembly e e /
Handle Bar Assembliy, Upper (includes 3 & 4) ,-j(17_I(_.gS_--_J_
Grip
Tube Closure
Washer
Bolt
Knob, 3 prong
Drive Shaft Housing Assembly ............. ._
Flexible Drive Shaft __Li" i .............
Handle Bracket Assembly (includes 11-15) s\ ,,
Screw , \
\ \
Upper Handle Clamp \, .\
Middle Handle Clamp \ ', (_')
Lower Handle (:lamp , \ .1..
Nut _ \ ',L_
Grip _') Y J',_/J _e
Lower Handle Bar _5_ }_"r_"h ;Z/_S,'
Hardware Handle Bar Mounting Iower_:y -_-"_) _;_:_<:_:_%
Wheel Bracket Mounting Hardware J:......
Guard Mounting Hardware _R,_j
Guard
Roller Bracket Assembly
Roller Axle
Roller
Roller Cap
Gearbox Assembly
Inner Tine (right side)
Outer Tine (right side)
Inner Tine (left side)
Outer Tine (left side)
Click Pin
Edger Tine
Edger Wheel
Sleeve Retainer Bolt
Switch
@tionam Accessories
791-147543 2-Cycle Oil
not shown
36
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MTD 21AS122R799 Owner's manual

Category
Mini tillers
Type
Owner's manual
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