MTD 316792040 Owner's manual

Brand: MTD

Model: 316792040

Category: Grass trimmers

Type: Owner's manual

This manual is also suitable for

Operator's Manual

2-Cycle

GAS TRIMMER

Model No. 316.79204.0

INCREDI.PULL TM

UNBELIEVABLE STARTING E A S E

with MAX FIRE,_IGNITION TM

* SAFETY

* ASSEMBLY

* OPERATION

* MAINTENANCE

* PARTS LIST

* ESPANOL, R 13

CAUTION: Before using this

product, read this manual and

follow all safety rules and

operating instructions.

FOR ANSWERS TO QUESTIONS ABOUT THiS PRODUCT, CALL 1=800=235=5878

Sears, Roebuck and Co., Hoffman Estates, IL 60179, U.S.A.

Visit our website: www.craftsman.com

P/N 769=06002 P01 4/10

CALiFORNiAPROPOSiTiON 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.

TABLE OF CONTENTS

Safety Rules ................................................. 2

Warranty .................................................... 4

Know Your Unit ............................................... 4

Assembly Instructions .......................................... 5

Oil and Fuel Information ........................................ 5

Starting/Stopping Instructions ................................... 6

Operating Instructions ......................................... 6

Maintenance and Repair Instructions .............................. 7

Cleaning and Storage .......................................... 9

Optional Equipment ........................................... 9

Troubleshooting Chart ........................................ 10

Specifications ............................................... 11

Parts List ................................................... 30

Service Numbers ..................................... Back Cover

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

#753=05245 Muffler Assembly.

All information, illustrations, and specifications in this manual 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.

The purpose of safety symbols is to attract your attention to possible dangers.

The safety symbols, and their explanations, deserve your careful attention and

understanding. The safety warnings do not by themselves eliminate any danger.

The instructions or warnings they give are not substitutes for proper accident

prevention measures.

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 pictographs.

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: Failure to obey a safety warning can result in

injury to yourself and others. Always follow the safety precautions

to reduce the risk of fire, electric shock and personal injury.

_IL CAUTION: 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.

NOTE: Advises of information or instructions vital to the operation or

maintenance of the equipment.

NOTE= This Unit Can Use an Power Start or Power Start Bit Optional

Accessory!

Please refer to the Power Starter or Power Start Bit operator's manual

for proper use of these features. (Items may be Sold Separately!

Please refer to page 9 of this manual for more information about

purchasing these accessories.)

Read the Operator's Manual and follow all warnings and safety instructions.

Failurs to do so can result in serious injury to the operator and/or bystanders.

FOR QUESTIONS, CALL 1-800-4-MY-HOME®

• iMPORTANT SAFETY iNSTRUCTiONS

READ ALL iNSTRUCTiONS BEFORE OPERATING

• Read the instructions carefully. Be familiar with the controls and proper use of

the unit.

Do not operate this unit when tired, ill, 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.

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. Ifapproached, stop the unit immediately.

Use only Craftsman Hassle-FreeTM XTRA QUIET Spiral Uneor 0.095 inch (2.41 mm)

diameter spool line as replacementline.Never use metal-reinforcedline,wireor

rope.Thesecan break offand become dangerous projectiles.

Squeeze the throttle control and check that it returns automatically to the idle

position. Make all adjustments or repairs before using unit.

SAFETY WARNINGS FOR GAS UNITS

-- i

L_ WARNING: Gasoline is highly 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.

Always stop the engine and allow it to cool before filling the fuel tank. Never

remove the cap of the fuel tank, or add fuel, when the engine is hot. Never

operate the unit without the fuel cap securely in place. Loosen the fuel tank

cap slowly to relieve any pressure in the tank.

Add fuel ina clean, well-ventilated outdoor area where there are no sparks or

flames. Slowly remove the fuel cap only after stopping engine. Do not smoke

while fueling. Wipe up any spilled fuel from the unit immediately. Always wipe

unit dry before using.

Move the unit at least 30 feet (9.1 m) from the fueling source and site before

starting the engine. Do not smoke or allow sparks and open flames near the

area while adding fuel or operating the unit.

WHILE OPERATING

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.

Be aware of the risk of injury to the head, hands and feet.

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.

The cutting attachment shield must always be in place while operating the

unit. Do not operate unit without both trimming lines extended, and the proper

line installed. Do not extend the trimming line beyond the length of the shield.

This unit has a clutch. The cutting attachment remains stationary when the

engine is idling. If it does not, have the unit adjusted by an authorized service

technician.

Adjust the D-handle position that will provide the best grip.

Be sure the cutting attachment is not in contact with anything before starting

the unit.

Use the unit only in daylight or good artificial light.

Avoid accidental starting. Be in the starting position whenever pulling the

starter rope. The operator and unit must be in a stable position while starting.

See Starting/Stopping Instructions.

• Usetherighttool.Onlyusethistoolforthepurposeintended.

Donotoverreach.Alwayskeepproperfootingandbalance.

Alwaysholdtheunitwithbothhandswhenoperating.Keepafirmgriponboth

thefrontandrearhandleorgrips.

Keephands,face,andfeetatadistancefromallmovingparts.Donottouch

ortrytostopthecuttingattachmentwhenitisrotating.

Donottouchtheengineormuffler.Thesepartsgetextremelyhotfrom

operationandwillremainhotforashorttimeafterturningofftheunit.

Donotoperatetheenginefasterthanthespeedneededtocut,trimoredge.

Donotruntheengineathighspeedwhennotcutting.

Alwaysstoptheenginewhencuttingisdelayedorwhenwalkingfromone

cuttinglocationtoanother.

Ifstrikingorbecomingentangledwithaforeignobject,stoptheengine

immediatelyandcheckfordamage.Donotoperatebeforerepairingdamage.

Donotoperatetheunitwithlooseordamagedparts.

Stopandswitchtheenginetooffformaintenance,repair,orforchangingthe

cuttingattachmentorotherattachments.

Useonlyoriginalequipmentmanufacturerreplacementpartsandaccessories

forthisunit.TheseareavailablefromSearsorotherauthorizedservicedealer.

Useofanyunauthorizedpartsoraccessoriescouldleadtoseriousinjuryto

theuser,ordamagetotheunit,andvoidthewarranty.

Keepunitcleanofvegetationandothermaterials.Theymaybecomelodged

betweenthecuttingattachmentandshield.

Toreducefirehazard,replacefaultymufflerandsparkarrestor.Keepthe

engineandmufflerfreefromgrass,leavesorotherdebris.

OTHERSAFETYWARNINGS

Neverstoretheunit,withfuelinthetank,insideabuildingwherefumesmay

reachanopenflameorspark.

Allowtheenginetocoolbeforestoringortransporting.Besuretosecurethe

unitwhiletransporting.

Storetheunitinadryarea,lockeduporuphightopreventunauthorizeduse

ordamage.Keepoutofthereachofchildren.

Neverdouseorsquirttheunitwithwateroranyotherliquid.Keephandlesdry,

cleanandfreefromdebris.Cleanaftereachuse.SeetheCleaningand

Storageinstructions.

Keeptheseinstructions.Refertothemoftenandusethemtoinstructother

users.Ifloaningsomeonethisunit,alsoloanthemtheseinstructions.

SAVETHESE iNSTRUCTiONS

= SAFETY & iNTERNATiONAL SYMBOLS •

This operator's manual describes safety and international symbols and pictographs that may appear on this product. Read the operator's manual for

complete safety, assembly, operating and maintenance and repair information.

SYMBOL MEANING

i/i_/ii/_/iii

///////////

SYMBOL MEANING

_iiiii!li,iiii'_i:_

iiiiiiiiii!iiii_!i:ii_

l!.............

_i'_iiiiiiN

iiiiiliii_

CRAFTSMAN PROFESSIONAL FULL WARRANTY

If this Craftsman Professional product fails due to a defect in material or workmanship within three years from the date of purchase, return it to any Sears store,

Parts & Repair Service Center, or other Craftsman outlet in the United States for free repair (or replacement if repair proves impossible).

This warranty applies for only one year if this product is ever used for commercial or rental purposes.

This warranty covers ONLY defects in material and workmanship. Sears will NOT pay for:

• Expendable items that can wear out from normal use within the warranty period, such as cutting line, filters or spark plugs.

• Repairs necessary because of accident or failure to operate or maintain the product according to all supplied instructions.

• Preventive maintenance, or repairs necessary due to improper fuel mixture, contaminated or stale fuel.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sears, Roebuck and Co., Hoffman Estates, IL 60179

APPLICATIONS

As a trimmer:

Cutting grass and light weeds.

Edging

• Decorative trimming around trees, fences, etc.

Muffler

Spark Plug

Starter Rope

Grip

Shaft Grip

Convertable TM

Coupler

Fuel Cap

On/Off Control

B-Handle Air Filter

Cover

Throttle

Control

Attachment

Shaft

Choke Lever

Primer Bulb

Cutting Head Shield

Cutting Head Line Cutting

Blade

iNSTALL AND ADJUST THE D= Shaft Grip

HANDLE

1. Place D-handle over the

shaft housing and onto the

bottom clamp (Fig. 1). Place

it a minimum of 6 inches

(15.24 cm) from the end of

the shaft grip. Minimum6 in.

2. Start screws with a large 115.24cm)

Flat-head or T-25 Torx

screwdriver. Do not tighten

until making the necessary

handle adjustment.

I _ Screws (4)

D-Handle

Bottom

Clamp

Fig. I

While holding the unit in the operating position (Fig. 9), move the D-

handle to the location that provides the best grip.

4. Tighten the clamp screws evenly, until the D-handle is secure.

iNSTALL THE SHOULDER SUPPORT

1. Put the shoulder support on

using the clip. (Fig. 2).

2. Adjust by lifting slightly on

the rear of the lower clip then

push or pull the loose end of

the strap length to fit the

operator's size and comfort.

(Fig. 3).

3. Attach the shoulder clip to

the unit. (Fig. 4)

Fig. 2

INSTALL THE CUTTING HEAD

SHIELD

1. Place the cutting head shield

onto the guard mount

bracket, making sure to align

the holes on the shield with

the ones in the guard mount

bracket. (Fig. 5)

2. Take the 4 shield screws and

screw each one into the

shield until finger tight.

3. Using a Flat Head or T-20

screw driver, tighten the

screws until the shield is

firmly in place. (Fig. 5

Support

Clip

Adjustment

Tab

Fig. 3

Support

Fitting

Fig. 4

\ \ Screws (4)

Shield \ \ GuardMount

Fig. 5

OIL AND FUEL MIXING INSTRUCTIONS

-- I_L_ ARNING: It has been proven that fuel containing greater than

15% ethanol will likely damage this engine and void the warranty.

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, m

DEFINITION OF BLENDED FUELS _ _,_

Today's fuels are often a blend of gasoline

and oxygenates such as ethanol,

methanol, or MTBE (ether). Alcohol- ' '

blended fuel absorbs water. As little as 1% UNLEADEDGAS 2CYCLE OIL

water in the fuel can make fuel and oil

1 GALLON US 3.2 FL. OZ.

separate. It forms acids when stored. (3.8 LITERS) (95 ml)

When using alcohol-blended fuel, use fresh

1LITER 25 ml

fuel (less than 30 days old). MIXING RATIO - 40:1

USING BLENDED FUELS

_[__J CAUTION: 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.

If choosing to use a blended fuel, or its use is unavoidable, follow

recommended precautions:

• Always use the fresh fuel mix explained in the 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 FUEL ADDITIVES

The bottle of 2-cycle oil contains a fuel additive which will help inhibit

corrosion and minimize the formation of gum deposits. It is recommended

to use our 2-cycle oil with this unit.

If unavailable, use a good 2-cycle oil designed for air-cooled engines along

with a fuel additive, such as STA-BIL® 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.

Thoroughly mix the proper ratio of 2-cycle engine oil with unleaded fuel in a

separate fuel can. Use a 40:1 fuel/oil ratio. Do not mix them directly in the

engine fuel tank. See the table for specific gas and oil mixing ratios.

NOTE: One gallon (3.8 liters) of unleaded fuel mixed with one 3.2 oz. (95

ml.) bottle of 2-cycle oil makes a 40:1 fuel/oil ratio.

NOTE: Dispose of the old fuel/oil mix in accordance to Federal, State and

Local regulations.

_ ARNING: Gasoline is 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.

FUELING THE UNIT

-- U_L_ WARNING: Remove fuel cap slowly to avoid injury from fuel

spray. Never operate the unit without the fuel cap securely in place.

1. Remove the fuel cap.

_ ARNING: Add fuel in a clean, level and well ventilated

outdoor area. Wipe up any spilled fuel immediately. Avoid creating

a source of ignition for spilled fuel. Do not start the engine until

fuel vapors dissipate.

2. Place the gas container's spout into the fill hole on the fuel tank and fill

the tank.

NOTE: Do not overfill the tank.

3. Wipe up any gasoline that may have spilled.

4. Reinstall the fuel cap.

5. Move the unit at least 30 ft. (9.1 m) from the fueling source and site

before starting the engine.

_L_ ARNING: Operate this unit only in a well-ventilated outdoor area. I

Carbon monoxide exhaust fumes can be lethal in a confined area.

_ ARNING: Avoid accidental starting. Make sure to be in the

starting position when pulling the starter rope (Fig.8). To avoid serious

injury, the operator and unit must be in a stable position while starting.

NOTE: This unit usesthe Incredi-PulFMstarting system, which significantly

reduces the effort required to start the engine. There is no harsh resistance

when pulling the starter rope. Be aware that this starting method isvastly

different from (and much easier than) previous starting techniques.

STARTING INSTRUCTIONS

1. Mix fuel with oil. See Oil and Fuel Mixing Instructions.

2. Fill the fuel tank with fresh, clean fuel mix. Refer to Fueling the Unit.

NOTE: There is no need to turn the unit on. The On/Off Control is in the ON ( I )

position at all times (Fig.6).

3. Fully press and release the Throttle ON (I)/OFF (O)

primer bulb 10 times, slowly. Lock-Out Controm

Some amount of fuel should \

be visible in the primer bulb

and fuel lines (Fig. 7). If fuel

can not be seen in the bulb,

press and release the bulb

until fuel is visible.

4. Place the choke lever in

Position 1 (Fig. 7).

5. Crouch in the starting Throttle Controm

position (Fig. 8). Press the

throttle lock-out in and Fig.6

squeeze the throttle control _B__._

lever. Pull the starter rope 5 Choke Lever

times.

6. Place the choke lever in

Position 2 (Fig. 7)

7. Press the throttle lock-out in

and squeeze the throttle

control. Pull the starter rope

in a controlled motion 3 to 5

times to start engine. Primer

8. Keep the throttle squeezed

and allow the engine to warm

up for 30 to 60 seconds. Fig. 7

9. Continue squeezing the Starting

throttle control, move the Position

choke lever to Position 3

(Fig. 7) and continue

warming the engine for an

additional 60 seconds. The

unit may be used during this

time.

NOTE: Unit is properly warmed

up when engine

accelerates without Throttle Control

hesitation.

IF... the engine hesitates, Fig.8

return the choke lever to Position 2 (Fig. 7) and continue warm-up.

IF... the engine does not start, go back to step 3.

IF... the engine fails to start after a few attempts, place the choke lever

in Position 3 and squeeze the throttle control. Pull the starter rope

out with a controlled and steady motion 3 to 8 times. The engine

should start. If not, repeat.

IF WARM... If the engine is already warm, start the unit with the choke lever in

Position 2. After the unit starts, move the choke lever to Position 3.

STOPPING INSTRUCTIONS

1. Release the throttle control and allow the engine to cool down by idling.

2. Press and hold the On/Off Control switch in the OFF (O) position until

the unit comes to a complete stop (Fig. 6).

HOW TO START THE UNiT USING THE ELECTRIC STARTER OR POWER

START BiT ACCESSORY.

NOTE= This Unit Can Use an Power Start or Power Start Bit Optional

Accessory!

Please refer to the Power Starter or Power Start Bit operator's manual

for proper use of these features. (Items may be Sold Separately!

Please refer to page 9 of this manual for more information about

purchasing these accessories.)

STARTING iNSTRUCTiONS

1. Mix fuel with oil. See Oil and Fuel Mixing Instructions.

2. Fill the fuel tank with fresh, clean fuel mix. Refer to Fueling the Unit.

NOTE: There is no need to turn the unit on. The On/Off Control is in the

ON ( I ) position at all times (Fig. 6).

3. Fully press and release the primer bulb 10 times, slowly. Some amount

of fuel should be visible in the primer bulb (Fig. 7). If fuel cannot be

seen in the bulb, press and release the bulb until fuel is visible.

4. Move the choke lever to Position 1 (Fig. 7).

5. Crouch in the starting position (Fig. 8). Place the electric starter or

power start bit into the back of the unit. Refer to the Operation section

of the Electric Starter or Power Start Bit operator's manual.

6. Press the throttle lock-out in and squeeze the throttle control lever.

Press and hold the electric starter or drill ON (I) button for 2 seconds.

7. Move the choke lever to Position 2 (Fig. 7).

8. Press the throttle lock-out in and squeeze the throttle control lever.

Press and hold the electric starter or drill ON (I) button for 2-second

intervals until the unit starts.

9. Continue to squeeze the throttle control, remove the electric starter or

drill from the unit and allow the engine to warm up for 30 to 60

seconds.

10. Continue squeezing the throttle control, move the choke lever to

Position 3 (Fig. 7) and run the unit for an additional 60 seconds. The

unit may be used during this time.

NOTE: Unit is properly warmed up when engine accelerates without

hesitation.

IF... the engine hesitates, return the choke lever to Position 2 (Fig. 7)

and continue warm-up.

IF... the engine does not start, go back to step 3.

IF... the engine fails to start after a few attempts, place the choke lever

in Position 3 and squeeze the throttle control. Press and hold the

electric starter or drill ON (I) button for 2-second intervals until the

unit starts.

IF WARM... If the engine is already warm, start the unit with the blue choker

lever in Position 2. After the unit starts, move the blue choker lever

to Position 3.

STOPPING iNSTRUCTIONS

1. Release the throttle control and allow the engine to cool down by idling.

2. Press and hold the On/Off Control switch in the OFF (O) position until

the unit comes to a complete stop (Fig. 6).

HOLDING THE TRIMMER

-- i_[_ ARNING: Always wear eye, hearing, foot and body protection

to reduce the risk of injury when operating this unit.

Before operating the unit, stand in the

operating position (Fig. 9). Check for the

following:

• The operator is wearing eye protection and

proper clothing

With a slightly-bent right arm, the operator's

right hand is holding the shaft grip

• The operator's left arm is straight, the left

hand holding the handle

• The unit is at waist level

The cutting attachment is parallel to the

ground and easily contacts the grass

without the need to bend over

Fig. 9

ADJUSTING TRIMMING LINE LENGTH

The cutting head allows the release of trimming line without stopping the

engine. To release more line, lightly tap the cutting attachment on the ground

(Fig. 10) while operating the trimmer at high speed.

NOTE: Always keep the trimming line fully

extended. Line release becomes

more difficult as the cutting line

becomes shorter.

Each time the head is bumped, about 1 inch

(25.4 mm) of trimming line is released. A

blade in the cutting attachment shield will cut

the line to the proper length if excess line is

released.

For best results, tap the cutting head on bare

Fig.1O

ground or hard soil. If line release is attempted in tall grass, the engine may

stall. Always keep the trimming line fully extended. Line release becomes

more difficult as the cutting line becomes shorter.

NOTE: Do not rest the cutting head on the ground while the unit is

running.

Some line breakage will occur from:

• Entanglement with foreign matter

Normal line fatigue

Attempting to cut thick, stalky weeds

Forcing the line into objects such as walls or fence posts

TiPS FOR BEST TRIMMING RESULTS

Keep the cutting attachment parallel to the ground.

Do not force the cutting attachment. Allow the tip of the line to do the

cutting, especially along walls. Cutting with more than the tip will reduce

cutting efficiency and may overload the engine.

Cut grass over 8 inches (200 mm) by working from top to bottom in small

increments to avoid premature line wear or engine drag.

Slowly move the trimmer into and out of the cutting area at the desired

height. Move either in a forward-backward or side-to-side motion. Cutting

shorter lengths produces the best results.

Trim only when grass and weeds are dry.

• The cutting head and shield are designed to allow the unit to cut in either

direction, from right to left or left to right.

• The life of the cutting line is dependent upon:

Proper adherence of explained trimming techniques

- What vegetation is cut

- Where vegetation is cut

For example, the line will wear faster when trimming against a foundation

wall as opposed to trimming around a tree. \

DECORATIVE TRIMMING

Decorative trimming is accomplished by

removing all vegetation around trees, posts,

fences and more.

Rotate the whole unit so that the cutting

attachment is at a 30° angle to the ground

(Fig. 11).

_L _J

Fig. 11

MAINTENANCE SCHEDULE

-- i_ ARNING: To prevent serious injuw, never perform maintenance

or repairs with unit running. Always service and repair a cool unit.

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

unsure about these procedures take the unit to Sears or other qualified

service dealer. Call 1-800-4-MY-HOME® for more information.

NOTE: Maintenance, replacement, or repair of the emission control devices

and system may be performed by a Sears or other qualified service

dealer. Call 1-800-4-MY-HOME® for more information.

FREQUENCY MAINTENANCE REQUIRED SEE

Before starting Fill fuel tank with fresh fuel p. 5

engine

Every 10 hours Clean and re-oil air filter p. 8

Every 25 hours Check spark plug condition and gap p. 9

RAPID REWIND TM CUTTING HEAD LINE iNSTALLATION

Only use 0.095 in. (2.41 ram) replacement line. Other line width may make the

engine overheat or fail. Cutting

NOTE: There may be a need to Arrow Head Knob

remove the old line prior

to installing new line. If

so, please refer to

Removing the old fine or

obstructions.

1. Align the arrows on the cutting

head knob with the outer

spool eyelets, if they are not Eyelet I

already. (Fig. 12)

2. Using 10.5 ft. (3.2 m) of 0.095 Fig. 12

in. (2.41 mm) replacement line

pushanendofthelinethrough--_ _

one of the eyelets until it

protrudes through the opposite

side. Continue pushing or

pulling the line until the line is

evenly distributed, so

approximately 5 ft. (1.5 m) is

visible from both sides of the

cutting head.(Fig. 13)

3. Hold the cutting head knob and

turn the cutting head clockwise Fig. 13

to wind the line around the

inner reeluntil 5 in. (12.7 cm) is

protruding from each side of

the cutting head.(Fig. 14)

NOTE: Ifwinding the line from a

large spool, push

approximately 5 ft. (1.5 m)

of line through the cutting

head to the other side. Tab

Turn the cutting head to

wind the line in. When the

line winds to a distance of Fig. 14

5 in. from the head, cut the line on the spool side 5 inches from the

head.

4. Start the unit and bump the cutting head on the ground until the desired

cutting length is achieved.

REMOVING THE OLD LINE OR OBSTRUCTIONS

NOTE: There should only be a

need to remove the

bump cap if there is an

obstruction or jammed

line preventing either

new line installation or

line advancement.

1. Firmly press in on the tabs that

are on each side of the cutting

head. (Fig. 15)

NOTE: It may be easier to press

in and then up on one

tab at a time.

2. Detach the bump cap either

by letting it pop off, or a

slight wiggle of the cap may

be required to pull it off the

outer spool (Fig. 15)

3. Remove any old line from the

inner reel or obstructions

from the outer spool. (Fig. 16)

4. Placethe inner reelback into the

outer spool (Fig. 15).

5. Reattach the bump cap by

aligning the tabs of the bump

cap with the tab lock

windows of the outer spool

and press down firmly until

both tabs snap back into

place. (Fig. 17)

To install new line, please refer to

the Rapid Rewind Cutting Head

Line Installation section.

Bump Cap _ / Spring

Inner

Reel ---_-___ Cutting

Head Knob

Outer _----I__

Spool

.,_ Gearbox

Fig. 15

Fig. 16

Fig. 17

CHANGINGTHE CUTTING HEADS

_1_ ARNING: The gear housing gets hot with use. It can result ininjury to the operator. The housing remains hot for a short time

even after the unit is turned off. Do not touch the gear housing

until it has cooled.

WARNING: To avoid serious personal injury or damage to the

unit, do not start or operate this unit with the locking rod in the

locking rod slot.

This unit was also shipped with a Hassle FreeTM PLUS cutting head. Either cutting

head may be used at the operator's discretion.

Removing the Rapid Rewind TM Cutting Head

1. Align the shaft bushing hole

with the locking rod slot and

insert the locking rod into the

output shaft bushing hole

(Fig. 18).

2. Hold the locking rod in place

by grasping it next to the shaft

housing of the unit (Fig. 19).

3. While holding the locking

rod, remove the cutting head

by turning it clockwise off of

the output shaft (Fig. 18).

Store the cutting head for

future use.

Installing the Hassle Free TM

PLUS Cutting Head

1. Place the cutting head onto

the output shaft and turn

counterclockwise until finger

tight. (Fig. 20)

2. Align the output shaft bushing

hole with the locking rod slot

and insert the locking rod into

the shaft bushing hole (Fig. 21).

3. Hold the locking rod in place

by grasping it next to the shaft

housing of the unit (Fig. 19).

4. Using a 1/2 in (13 ram) open-

end wrench, tighten the

cutting head securely in place.

Remove the locking rod.

Refer to the Hassle-Free TM PLUS

line replacement instructions, for

line installation.

Removing the Hassle-Free TM

PLUS Cutting Head

1. Align the output shaft bushing

hole with the locking rod slot

and insert the locking rod into

the output shaft bushing hole

(Fig. 18).

2. Hold the locking rod in place

by grasping it next to the shaft

housing of the unit (Fig. 19).

3. Use a 1/2 in (13 mm) wrench

to remove the cutting head

from the output shaft on the

gearbox by turning clockwise. (Fig. 20)

Rapid Rewind TM Head

Output

Shaft

Bushing

Locking

Rod

Fig. 18

Fig. 19

Glide Plate Hassle Free TM

PLuBHead

Output Shaft _

Fig. 20

Rapid Rewind TM Head

Output _

Shaft

Bushing

Hole .__

Locking

Rod

Fig. 21

Installing the Rapid Rewind TM cutting head

1. Align the output shaft bushing hole with the locking rod slot and insert the

locking rod into the shaft bushing hole (Fig. 21).

2. Hold the locking rod in place by grasping it next to the shaft housing of

the unit (Fig. 19).

3. Screw the cutting head counterclockwise onto the output shaft. Tighten

securely. (Fig. 21) Remove the locking rod.

HASSLE=FREE TM PLUS LiNE REPLACEMENT

Always use Craftsman Hassle-Free TM XTRA QUIET Spiral Line. Choose the

line size best suited for the job at hand. Red colored line is designed for

cutting grass and small weeds. Black colored line is designed for cutting

larger weeds and light brush.

NOTE: Before inserting new line into the holes in the cutting head, identify

the proper holes. Follow

directions as shown on

the glide plate. Do Not Glide Plate

attempt to remove the

cutting head from the

unit when replacing line.

Do not mix lines. Use 2NOTE:

black or 2 red only.

1. Remove the old line and line

glide plate from the cutting

head.

2. Clean entire surface of

cutting head.

3. Reinstall lineglide plate (Fig. 22).

The glide plate isa keyed item

and will only fit one way. If it

does not go into the cutting

head smoothly, DO NOT force it.

Rotatethe glide plate until it

slides into the cutting head

easily.

NOTE: The glide plate must be

installed in the cutting

head before inserting

new line.

4. Insertboth ends of the line

through the large holes in the

side ofthe cutting head (Fig.23).

5. Push and/or pull the lineso that

the line is snug against the hub

and is fully extended through

the positioning tunnels. (Fig. 24)

6. Correctly installed line will be

the same length on both

sides.

Cuttin¢ Head

Fig. 22

Large Holes

Fig.23

PositioningTunnel

Fig. 24

NOTE: Make sure that when installing new line, that the line is as close to

even as possible. Any variation in lengths may cause the unit to

vibrate excessively. If this happens, stop the unit and make sure

the line is even.

7. Repeat steps 4 thru 6 to install the second trimmer line.

NOTE: Do not rest the Hassle-Free TM PLUS Cutting Head on the ground

while the unit is running.

Some line breakage will occur from:

• Entanglement with foreign matter

Normal line fatigue

Attempting to cut thick, stalky weeds

Forcing the line into objects such as walls or fence posts

NOTE: During normal use the trimming line may become worn unevenly

which may cause excessive vibrations in the unit. Ifthis becomes

uncomfortable or uncontrollable, stop the unit and replace the line.

AiR FILTER MAINTENANCE

Cleaning the Air Filter

_[_ ARNING: To avoid serious personal injury, always turn the

unit off and allow it to cool before cleaning or maintaining it.

Clean and re-oil the air filter every 25 hours of operation. It is an important

item to maintain. Failure to maintain your air filter properly can result in poor

performance or can cause permanent damage to your engine.

1. Open the air filter cover. Tab Lock

Push the locking tab on the

top of the cover inward, then

pull the air filter cover out Air Filter

and down. (Fig. 25).

2. Remove the air filter (Fig. 25). Tab

3. Wash the filter in detergent

and water (Fig. 26). Rinse the Air Filter

filter thoroughly and allow it Cover

to dry. Fig.25

4. Apply enough clean SAE 30

motor oil to lightly coat the filter (Fig. 27).

5. Squeezethefiltertospread J /

andremoveexcessoil(Fig.28).

6. Replacethefilter(Fig.25).

NOTE:Iftheunitisoperated

withouttheairfilter,you

willVOIDthewarranty.

7. Reinstalltheairfiltercover.

Positiontheslotsonthe

bottomoftheairfiltercover

ontothetabsatthebottom Fig.26

ofthebackplate(Figs.25).

8. Swingthecoverupuntilthe

tabontheairfilterbackplate

snapsintoplaceinthesloton

theairfiltercover(Fig.25).

CARBURETORADJUSTMENT

The idle speed of the engine is

adjustable. An idle adjustment

screw is between the air filter

cover and the engine starter

housing (Fig. 29). Fig. 27

NOTE: Careless adjustments

can seriously damage

the unit. An authorized

service dealer should

make carburetor

adjustments.

Check Fuel Mixture

Old and/or improperly mixed fuel

is usually the reason for improper

unit performance. Drain and refill

the tank with fresh, properly- Fig. 28

mixed fuel prior to making any adjustments. Refer to Oil 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 screw. Refer to Air Filter Maintenance.

Adjust Idle Speed Screw

WARNING: The cutting attachment may spin 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:

Start the engine and run for

one minute to warm up.

Refer to Starting/Stopping

Instructions.

Release the throttle trigger

and let the engine idle. If

the engine stops, insert a

small phillips screwdriver

into the idle adjustment

screw (Fig. 29). Turn the idle

speed screw clockwise 1/8

Idle Adjustment

Screw

Fig. 29

of a turn at a time (as needed) until the engine idles smoothly.

3. If the engine appears to be idling too fast, 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

should solve most engine problems. If not and all of 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 an authorized service dealer.

REPLACING THE SPARK PLUG

Use replacement #753-06193, a Champion RDJSJ spark plug, or

equivalent. The correct air gap is 0.025 inch (0.635 ram). 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 firmly and pull

it from the spark plug.

2. Clean around the spark plug. Remove the spark plug from the cylinder

head by turning a 5/8-inch socket counterclockwise.

_L_ ARNING: Do not sand blast, scrape or clean spark plug

electrodes. Grit in the engine could damage the cylinder.

3. Replace a cracked, fouled or I I

dirty spark plug. Set the air

gap at 0.025 in. (0.635 mm)

using a feeler gauge (Fig. 30).

4. Install a correctly-gapped

spark plug in the cylinder

head. Tighten by turning the

5/8-inch socket clockwise

until snug. 0.025 in. _, .

If using a torque wrench torque to: (0.635 ram) t

110-120 in.olb. (12.3-13.5 Nora)

Do not over tighten. Fig.30

CLEANING

_[_ ARNING: To avoid serious personal injury, always turn the

unit off and allow it to cool before cleaning or maintaining it.

Use a small brush to clean off the outside of the unit. Do not use strong

detergents. Household cleaners that contain aromatic oils such as pine and

lemon, and solvents such as kerosene, can damage plastic housing or

handle. 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 locked up 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 planning on storing the unit for an extended time, use the following storage

procedure:

1. Drain all fuel from the fuel tank into a container with the same 2-cycle

fuel mixture. Do not use fuel that has been stored for more than 30

days. Dispose of the old fuel/oil mix in accordance to Federal, State

and 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 any high quality motor oil or 2-cycle 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 it for any loose or damaged

parts. Repair or replace damaged parts and tighten loose screws, nuts

or bolts. The unit is ready for storage.

PLUG-IN POWER START AND POWER BIT START FEATURES

This unit is designed to be started with an optional Plug-In Power Start or

Power Bit Start that are sold separately. If choosing to start the unit using

one of these features or have questions please contact your local retailer or

call 1-800-4-MY-HOME®, for more information and purchasing. You may

also go to www.sears.com/craftsman.

Electric Start Feature

Item No. Description

316.85951 ..................................... Plug-In Power Start

316.85952 ........................................ Power Bit Start

PROBLEM SOLUTION

Empty fuel tank

Old or improperly mixed fuel

Engine is flooded

Air filter is plugged

Improper idle speed

Old or improperly mixed fuel

Dirty air filter

Old or improperly mixed fuel

Fill fuel tank with properly mixed fuel

Drain fuel tank and add fresh fuel mixture

With choke lever in position 3, squeeze the trigger and pull the starter rope

Replace or clean the air filter

Adjust according to the Idle Speed Adjustments section.

Drain fuel tank and add fresh fuel mixture

Clean or replace the air filter

Drain fuel tank and add fresh fuel mixture

Cutting attachment bound with grass

Inner reel bound up

Line welded

Not enough line is exposed

Oil, cleaner or lubricant in cutting head

Stop the engine and clean cutting attachment

Replace the inner reel

Disassemble, remove the welded section and rewind

Push the bump head and pull out line until 4 inches (102 mm) of line is

outside of the cutting attachment

Clean and thoroughly dry the cutting head

ELP.

YOu,,_[ find the answer" and mo_'e on managemyhomeoCOm - £o_"£_'ee°

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Engine Type ..................................................................................................... Air-Cooled, 2-Cycle

Stroke .......................................................................................................... 1.10 in. (2.794 cm)

Displacement ............................................................................................................... 27 cc

Operating RPM ......................................................................................................... 7,500+ rpm

Idle Speed RPM ................................................................................................... 3,200 - 3,400 rpm

Ignition Type ............................................................................................................ Electronic

Ignition Switch ....................................................................................................... Rocker Switch

Spark Plug Gap ................................................................................................. 0.025 in. (0.635 mm)

Lubrication ......................................................................................................... Fuel/Oil Mixture

Fuel/Oil Ratio ................................................................................................................ 40:1

Carburetor ................................................................................................... Diaphragm, All-Position

Starter .............................................................................................................. Incredi-Pull TM

Muffler .......................................................................................................... Baffled with Guard

Throttle ....................................................................................................... Manual Spring Return

Fuel Tank Capacity .................................................................................................. 14 fl.oz. (414 ml)

Drive Shaft Housing ................................................................................................ Aluminum Tube

Throttle Control ......................................................................................... Finger-Tip Trigger w/Lockout

Approximate Unit Weight (No fuel, with Hassle Free(b, shield, and D-handle) .................................................... 13 Ibs (4.6 kg)

Trimmer Head ............................................................................ Hassle Free TM PLUS Head or Rapid Rewind TM

Trimming Line .................................................... Hassle Free TM XTRA QUIET Spiral Line or 0.095 in (2.41 mm) trimmer line**

* 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.

** Dependant on which trimmer head being used. DO NOT use 0.095in (2.41 mm) trimmer line in the Hassle Free TM PLUS cutting head.

REPAIR PROTECTION AGREEMENTS

Congratulations on making a smart purchase. Your new Craftsman <_product is designed and manufactured for years of dependable operation. But like all

products, it may require repair from time to time. That's when having a Repair Protection Agreement can save you money and aggravation.

Here is what the Repair Protection Plan Agreement includes:

[] Expert service by our 10,000 professional repair specialists

[] Unlimited service and no charge for parts and labor on all covered repairs

[] Product replacement up to $1500 if your covered product can not be fixed

[] Discount of 10% from regular price of service and related installed parts not covered by the agreement; also, 10% off regular price of

preventive maintenance checks

[] Fast help by phone - we call it Rapid Resolution - phone support from a Sears representative. Think of us as a "talking owner's

manual."

Once you purchase the Agreement, a simple phone call is all that it takes for you to schedule service. You can call anytime day or night, or schedule a service

appointment online.

The Repair Protection Agreement is a risk-free purchase. If you cancel for any reason during the product warranty period, we will provide a full refund. Or a prorated

refund anytime after the product warranty period expires. Purchase you Repair Protection Agreement today!

Some limitations and exclusions apply. For prices and additional information in the U.S.A. call 1-800-827-6655.

*Coverage in Canada varies on some items. For full details call Sears Canada at 1-800-361-6665.

Sears Installation Service

For Sears professional installation of home appliances, garage door openers, water heaters, and other major home items, in the U.S.A. or Canada call 1-800-4-MY-HOME®.

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Manual del Operador

NRH

2 Ciclos

RECORTADOR de GASOLINA

Modelo No. 316.79204.0

INCREDI.PULL_TM

UNBELIEVABLE STARTING EA S E

with MA×FIRE_IGNITION M

,, SEGURIDAD

* MONTAJE

* FUNCIONAMIENTO

* MANTENIMIENTO

LISTADO DE PIEZAS

PRECAUCION: Lea el manual

del operador y siga todas las

advertencias e instrucciones

de seguridad.

PARA OBTENER INFORMACION SOBRE ESTE PRODUCTO, LLAME AL 1=800=235=5878

Sears, Roebuck and Co., Hoffman Estates, IL 60179, U.S.A.

Visite nuestro sitio web: www.craftsman.com

P/N 769=06002 P01 4/10

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REPLACEMENT PARTS - MODEL 316.792040

2-CYCLE TRIMMER

item Part No.

17 753-06247

18 753-06246

19 753-06360

20 753-06091

Item Part No. Description 21 753-06104

1 753-06349 Muffler Assembly 22 753-06364

2 753-04294 Mufier Bolts 23 753-06361

3 753-06352 Muffler Gasket 24 791-181345

4 753-06353 Gasket 25 753-05805

5 753-06354 Insulator Assembly (includes 4) 26 753-06362

6 753-06355 Heat Shield 27 753-06363

7 753-06356 Carburetor 28 753-06193

8 753-06253 Carburetor Gasket 29 753-05703

9 753-05725 Aircleaner Assembly (includes 10) 30 753-06250

10 791-181757 Aircleaner Filter 31 791-181930

11 753-06357 Lead Wire 32 791-182612

12 753-05420 Module Assembly 33 753-05883

13 753-05805 Clutch Cover Screws 34 753-04003

14 753-06358 Clutch Cover Assembly (includes 13, 34-36) 35 791-180217

15 753-06281 Clutch Assembly 36 791-182516

16 753-06359 Spacer 37 753-06365

Description

Washer

Flywheel Assembly

Cylinder Gasket

Pawl Assembly

Electric Starter Adapter

Starter Cover Guard (includes 25)

Starter Assembly (includes 22 & 25)

Screw

Spark Plug Cover

Engine Cover

Spark Plug

Cylinder Screws

Fuel Tank Assembly (includes 31 & 32)

Fuel Tank Screws

Fuel Cap

Throttle Cable

Screw

Nut

Anti-Rotation Screw

Shortblock (includes 12, 16-19 & 28-29)

REPLACEMENT PARTS - MODEL 316.792040

2-CYCLE TRIMMER

item Part No.

1 753-05296

2 753-05393

3 753-05007

4 753-05171

5 791-182405

6 791-610327

7 753-05747

8 753-05008

9 791-181070

10 753-06098

11 753-05820

12 753-05821

13 753-06125

14 791-182193

15 791-182196

16 753-06102

17 753-04348

18 753-05779

19 753-05780

20 753-06395

* 791-613226

* 753-05038

* 753-05898

Description

Throttle Housing Assembly (includes 2-5)

Throttle Trigger

Spring

Throttle Lock-Out

Switch

Shoulder Strap Clip

Driver Shaft Housing

D-Handle Assembly (includes 9)

Screw

Flexible Drive Shaft

Shield Assembly (includes 12)

Blade Assembly

Screw & Nut

Gearbox

Gearbox Spacer

Cutting Head Assembly f_

Palnut

Fixed Line Head

Glide Plate

Washer

Locking Rod Tool

Fixed Line

Shoulder Strap

* Items Not Shown

Your Home

For expert troubleshooting and home solutions advice:

www.managemyhome.corn

For repair - in your home - of all major brand appliances,

lawn and garden equipment, or heating and cooling systems,

no matter who made it, no matter who sold it!

For the replacement parts, accesspries and

owner's manuals that you need to do-it-yourself.

For Sears professional installation of home appliances

and items like garage door openers and water heaters.

1-800-4-MY-HOME ® (1-8oo-4o9-4oo3)

Call anytime, day or night (U.S.A. and Canada)

www.sears.com www.sears.ca

Our Home

For repair of carry-in items like vacuums, lawn equipment,

and electronics, call anytime for the location of your nearest

Sears Parts & Repair Service Center

1-800-488-1222 (U.S.A.) 1-800-469-4663 (Canada)

www.sears.corn www.sears.ca

To purchase a protection agreement on a product serviced by Sears:

1-800-827-6655 (U.S.A.) 1-800-361-6865 (Canada)

Para pedir servicio de reparaci6n Au Canada pour service en fran(_ais:

a domicilio, y para ordenar piezas: 1-800-LE-FOYER Mc

1-800-SU-HOGAR ® (1-800-533-6937)

(1-888-784-6427) www.sears.ca

® Registered Trademark / TMTrademark / Service Mark of Sears Brands, LLC

® Marca Registrada / TMMarca de F&brica / SMMarca de Servicio de Sears Brands, LLC

MTD 316792040 Owner's manual

Brand: MTD

Model: 316792040

Category: Grass trimmers

Type: Owner's manual

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