Craftsman 316.791210 Operator's Manual

Operator's Manual

4-Cycle

TRIMMER

Model No. 316.791210

INCREDI.PULbffUL TM

UNBELIEVABLE STARTING E A S E

* 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.

Sears Brands Management Corporation, Hoffman Estates, IL 60179 U.S.A.

Visit our website: www.craftsman.com

P/N 769=06326 P00 9/10

CALiFORNiAPROPOSiTiON 65 WARNING

THE ENGINE EXHAUST FROM THiS PRODUCT CONTAINS CHEMICALS

KNOWN TO THE STATE OF CALiFORNiA TO CAUSE CANCER, BIRTH

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.

READ ALL INSTRUCTIONS BEFORE OPERATING GENERAL SAFETY

• 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. 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. Never store the unit, with fuel in the tank, inside a building where fumes

may reach an open flame (pilot lights, etc.) or sparks (switches, electrical motors, etc.).

Allow the engine to cool before storing or transporting. Be sure to secure the unit while transporting.

Store the unit in a dry place, either locked up or up high to prevent unauthorized use or damage. Keep 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

Cleaning and Storage instructions.

DEFECTS OR OTHER REPRODUCTIVE HARM.

• iMPORTANT SAFETY iNSTRUCTiONS

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 bythemselves eliminate any danger. The instructions or warnings they give are not substitutes for proper accident

prevention measures.

SYMBOL MEANING

Attention is required in order to avoid serious personal injury.

SAFETY ALERT: Indicates danger, warning or caution.

May be used in conjunction with other symbols or pictographs.

injury to yourself or to others. Always follow the safety precautions

DANGER: Failure to obey a safety warning will result in serious

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

injury to yourself and others. Always follow the safety precautions

WARNING: Failure to obey a safety warning can result in

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

_IL CAUTION: Failure to obey a safety warning may result in

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

NOTE= This Unit Can Use a Plug-in Power Start or Power Bit Start

Read the Operator's Manual and follow all warnings and safety instructions. Failure to do so can result in serious injury to the operator and/or bystanders.

FOR QUESTIONS, CALL 1=800=4=MY=HOME®.

Keep these instructions. Refer to them often and use them to instruct

other users. If you loan this unit to others, also loan these instructions to them.

Wear safety glasses or goggles that are marked as meeting ANSI Z87.1-

1989 standards and are marked as such. Wear ear/hearing protection

when operating this unit.

Never run the unit without the the proper equipment attached.

To reduce the risk of hearing loss associated with sound level(s), always wear ear/hearing protection when operating this unit.

Wear heavy long pants, boots, gloves, and a long sleeve shirt. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. Secure

hair above shoulder level. Use the unit only in daylight or good artificial light.

• Keep outside surfaces free from oil and fuel. 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. Refer to Starting/Stopping Instructions.

• Do not set unit on any surface except a clean, hard area while engine is

running. Debris such as gravel, sand, dust, grass, etc. could be picked up by the air intake and thrown out by the discharge opening, damaging unit,

property, or causing serious injury to bystanders or operator. Use the right tool. Only use this tool for its intended purpose.

Do not force unit. It will do the job better and with less likelihood of injury

at a rate for which it was designed.

• Do not overreach or use from unstable surfaces such as ladders, trees, steep slopes, rooftops, etc. Always keep proper footing and balance.

Always hold the unit with a firm grip when operating.

Keep hands, face, and feet away from all moving parts. Do not touch or

try to stop the impeller when it is rotating. Do not operate without guards

in place. Do not put any object into openings. Do not use with any opening

blocked; keep free of dirt, debris, and anything that may reduce the air

flow.

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.

maintenance of the equipment.

Optional Accessory! Please refer to the Plug-In Power Start or Power Bit Start 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.)

• Donottouchtheengineormuffler.Thesepartsgetextremelyhotfrom • Alwaysaddfuelinaclean,well-ventilatedoutdoorareawherethereareno operation,evenaftertheunitisturnedoff.

Donotoperatetheenginefasterthanthespeedneededtodothejob.Do notruntheengineathighspeedwhennotinuse.

Alwaysstoptheenginewhenoperationisdelayedorwhenwalkingfrom

onelocationtoanother. Useonlygenuinefactoryreplacementpartsandaccessoriesforthisunit.

Theseareavailablefromyourauthorizedservicedealer.Useofany unauthorizedpartsoraccessoriescouldleadtoseriousinjurytotheuser

ordamagetotheunit,andvoidyourwarranty. Ifyoustrikeorcomeintocontactwithaforeignobject,stoptheengine

immediatelyandcheckfordamage.Donotoperatebeforerepairing damage.Donotoperatetheunitwithlooseordamagedparts.

Toreducefirehazard,replacefaultymufflerandsparkarrestor.Keepthe engineandmufflerfreefromgrass,leaves,excessivegreaseorcarbon

buildup.

OiLAND FUEL SAFETY

-- i_L_ ARNING: Gasoline is highly flammable and its vapors can

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.

explode if ignited. Take the following precautions:

Store fuel only in containers specifically designed and approved for the storage of such materials.

Always stop the engine and allow it to cool before filling the tank. Never remove the fuel tank cap or add fuel when the engine is hot. Always

loosen the fuel tank cap slowly to relieve any pressure in the tank before fueling. DO NOT smoke.

,, SAFETY & iNTERNATiONAL SYMBOLS ,,

sparks or flames. DO NOT smoke.

• Never operate the unit without the fuel cap securely in place. Avoid creating a source of ignition for spilled fuel. Wipe up any spilled fuel

from the unit immediately before starting the unit. Move thge unit at least 30 ft. (9.1 m) from the fueling source and site before starting the engine.

DO NOT smoke. 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.

TRIMMER SAFETY

= The trimmer 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. Adjust the D-handle that provides the best possible grip.

Be sure the trimmer attachment is not in contact with anything before

starting the unit.

Use only Hassle Free TM XTRA QUIET Spiral Line replacement line. Never

use metal-reinforced line, wire, chain or rope. These can break off and become dangerous projectiles.

Keep unit clean of vegetation and other materials. They may become

lodged between the trimmer attachment and shield.

Keep hands, face, and feet away from all moving parts. Do not touch or

try to stop the trimmer attachment when it rotates.

SAVE THESEINSTRUCTIONS

SYMBOL MEANING SYMBOL MEANING

CRAFTSMAN 2 YEAR FULL WARRANTY

FOR 2 YEAR(S) from the date of purchase, this product is warranted against any defects in material or workmanship. Defective product will receive free repair or free replacement if repair is unavailable.

For warranty coverage details to obtain repair or replacement, visit the web site: www.craftsman.com This warranty covers ONLY defects in material and workmanship. Warranty coverage does NOT include:

• Expendable items that can wear out from normal use within the warranty period, such as cutting line, air cleaner, or spark plug. Product damage resulting from user attempts at product modification or repair or caused by product accessories. 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 is void if this product is ever used while providing commercial services or if rented to another person. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sears Brands Management Corporation, Hoffman Estates, IL 60179

APPLiCATiONS

As a trimmer:

Cutting grass and light weeds. Spark Plug

• Edging Muffler

Decorative trimming around trees, fences, etc.

Starter Re

Grip

D-Handle

Attachment

Shaft

Hassle Free ® Catting Head

On/Oft Control

Convertable TM

Coupmer Air Fimter

Line Cutting

Blade

Catting Bead Shield

Shaft Grip Oil Fill Plug

Fuel Cap

l Weather

Throttle

ControN

Cold

Start Lever

Cover

Choke Lever

Primer Bumb

ADJUSTING THE D=NANDLE Shaft Grip D-Handle

1. Loosen the screws on the D- handle (Fig. 1).

2. While holding the unit in the operating position (Fig. 12),

position the D-handle to the location that provides the Min. 6 in.

best grip. (15.24cm)

3. Tighten the clamp screws _<_r-_ evenly, until the D-handle is

secu re. Screw

OPERATING THE Fig. 1 CONVERTIBLE TM COUPLER SYSTEM

and understand the manual that came with the attachment. Folio

WARNING: Before beginning the use of any attachment, read|

_L_lb] ARNING: These attachments are to be snapped into the i

The Convertible TM coupler system enables the use of these optional attachments. For information about attachments, call 1=800=4=MY-HOME®.

• Edger

• Cultivator

• Brushcutter

iNSTALLING AN ATTACHMENT

NOTE: To make installing or

1. Turn knob counterclockwise

2. While firmly holding the

NOTE: Aligning the release

3. Turn the knob clockwise to

NOTE: When using the line

REMOVING AN ATTACHMENT

primary hole only. Using the wrong hole could lead to personal injury or damage to the unit.

Turbo Blower

Pole Saw Hedge Trimmer

button is fully snapped into the primary hole (Fig. 2), and that the

WARNING: Before operating this unit, be sure that the release

knob (F g. 4) s secure y t ghtened.

removing the attachment easier, place the unit on

the ground or on a work --

bench.

to loosen (Fig. 4).

trimmer attachment or other attachment, push it straight

into the Convertible TM coupler until the release

button snaps firmly into the primary hole (Fig. 3).

button with the guide recess will help

installation (Fig. 2).

tighten (Fig. 4).

trimmer or other

attachment to edge, lock

the attachment release Fig. 3

button into the 90° hole (Fig. 4).

Convertible TM Release Button

Coup,er X /

Fig. 2

Primary Hole

Guide Recess

Shaft

1all safety information contained within.

I A I WARNING: To avoid serious personal injury and damage to the I

__ unit, shut the unit off before removing or installing attachment. |

1. Turn the knob counterclockwise to loosen

(Fig. 4).

2. Press and hold the release button (Fig. 2).

3. While firmly holding the upper shaft, pull the trimmer

attachment or other attachment straight out of

the Convertible TM coupler (Fig. 3).

90° Edging Hole

(Trimmj__ _ Knob

Fig. 4

RECOMMENDED OiL TYPE Using the proper type and weight of oil in the crankcase is extremely important.

Check the oil before each use and change the oil regularly. Failure to use the

correct oil, or using dirty oil, can cause premature engine wear and failure.

Use a high-quality SAE 30 weight oil of API (American Petroleum Institute)

service class SF, SG, SH. ADDING OIL TO CRANKCASE: INITIAL USE

NOTE: This unit is shipped without oil. In order to avoid damage to the

The unit is supplied with one 3.04 fluid oz. (90 ml.) bottle of SAE 30

SF, SG, SH oil (Fig. 5).

NOTE: Save the bottle of oil. It

1. Unscrew the top of the bottle

2. Remove the oil fill plug from the

3. Pour the entire bottle of oil

NOTE: Never add oil to the fuel

4. Wipe up any oil that may

Check oil before each use and Fig. 6

change as needed. Refer to

Checking the Oil Level. oil Fill Plug RECOMMENDED FUEL TYPE

Old fuel is the primary reason for

improper unit performance. Be

sure to use fresh, clean, unleaded gasoline. O-Ring

NOTE: Dispose of the old

NOTE: This is a four cycle

Definition of Blended Fuels

-- i

_[_ ARNING: Fuel containing greater than 10% ethanol will likely

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%

water in the fuel can make fuel and oil separate or form acids when stored.

Use fresh fuel (less than 30 days old), when using alcohol-blended fuel. Using Blended Fuels

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

• Always use fresh unleaded gasoline

Using Fuel Additives

The use of fuel additives, such as STA-BIL® Gas Stabilizer or an equivalent, will

inhibit corrosion and minimize the formation of gum deposits. Using a fuel additive

can keep fuel from forming harmful deposits inthe carburetor for up to six (6)

months. Add 0.8 oz. (23 ml.) of fuel additive per gallon of fuel according to the instructions on the fuel additive container. NEVER add fuel additives directly to the

unit's gas tank.

unit, put oil in the crankcase before attempting to start the unit.

can be used to measure the correct amount

during future oil changes. See Changing

the Oil. Spout /

of oil and remove the paper seal covering the opening.

Replace the top. Next, cut Fig. 5

the tip off the funnel spout

(Fig. 5).

crankcase (Fig. 7).

into the oil fill hole (Fig. 6).

or fuel tank.

have spilled and reinstall the

oil fill plug. Oil Fill Hole

gasoline in accordance to Federal, State and oil Fill

Local regulations.

engine. In order to avoid Fig. 7 damage to the unit, do not mix oil with gasoline.

damage the engine and void the warranty.

Use the fuel additive STA-BIL® or an equivalent Drain tank and run the engine dry before storing unit

Funnel I

Hole

WARNING: 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.

141_ilbIWARNING:Addfuelinaclean,wellventilated°utd°°rarea.WipeI

upanyspilledfuelimmediately.Avoidcreatingasourceofignitionfor spiltfuel.Donotstarttheengineuntilfuelvaporsdissipate.

FUELINGTHE UNIT

-- i

,_1_ WARNING: Remove fuel cap slowly to avoid injury from fuel

1. Remove the fuel cap (Fig. 8).

2. Place the gas container's

NOTE: Do not overfill the tank.

3. Wipe up any gasoline that

4. Reinstall the fuel cap.

5. Move the unit at least 30 ft.

I _ IWARNING: Operate this unit only in a well-ventilated outdoor area. I

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

I _ _starting position when pulling the starter rope (Fig. 11). To avoid serious I

NOTE:

1. Check the oil level in the

2. Fill the fuel tank with fresh,

STARTING INSTRUCTIONS __

NOTE: There is no need to turn

IF COLD... Forcold weather

3. Fully press and release the

4. With the unit inthe starting position, do not squeeze the throttle control

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather

5. Once the unit starts, wait 60 seconds and then squeeze the throttle control.

6. Continue squeezing the throttle control for an additional 30 to 60 seconds

IF,.. The engine does not start, go back to step 3. IF,.. The engine stops while squeezing the throttle, go back to step 4.

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

Gas Can Spout

spout into the fill hole on the fuel tank (Fig. 8) and fill the

tank.

may have spilled.

(9.1 m) from the fueling

source and site before starting the engine.

,_ I WARNING: Avoid accidental starting. Make sure to be in the

injury, the operator and unit must be ina stable position while starting, j

This unit uses the Incredi=PuIF M starting system, which significantly reduces the effort required to start the engine.

crankcase. Refer to Checking the Oil Level.

clean unleaded gasoline.

Refer to Fueling the Unit.

the unit on. The On/Off Control is in the ON (I)

position at all times Throttle Control (Fig. 9). Fig. 9

conditions (below 40°F), Cold Weather PrimerBulb flip the Cold Weather Start Starter Lever Lever (Fig. 10)down to the start/closed position and Run/Open

continue to step 3. DO NOT flip this lever down if

the temperature is above 40°E

primer bulb 10 times, slowly. Close/Start Some amount of fuel should

be visible in the primer bulb (Fig. 10). If fuel can not be Fig. 10

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

(Fig. 11). Pull the starter rope in a controlled motion until unit starts.

Start Lever back up to the run/open position after the unit has started and before squeezing the throttle control.

to let the engine warm up. The unit may be used during this time.

FuemTank

Fig. 8

Fuel Cap

STOPPING INSTRUCTIONS Starting

1. Release the throttle control Position and allow the engine to cool

down by idling.

2. Press and hold the On/Off Control in the OFF (O) position until the unit comes to a complete stop. (Fig. 9)

Throttle Control

Fig. 11

NOTE= This Unit Can Use a Plug-In Power Start or Power Bit Start

STARTING INSTRUCTIONS

1. Check the oil level in the crankcase. Refer to Checking the Oil Level.

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

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

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather

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

4. With the unit in the starting position (Fig. 11). Place the Plug-In Power

5. Do Not squeeze the throttle control, press and hold the Plug-In Plug-

IF COLD... For cold weather conditions (below 40°F), flip the Cold Weather

6. Once the unit starts, remove the Plug-In Power Start or drill from the

7. Continue squeezing the throttle control for an additional 30 to 60 seconds

IF... The engine does not start, go back to step 3. IF... The engine stops while squeezing the throttle, go back to step 4.

STOPPING INSTRUCTIONS

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

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

HOLDING THE TRIMMER

-- i_L_ ARNING: Always wear eye, hearing, foot and body protection

Before operating the unit, stand in the

operating position (Fig. 12). Check for the following:

• The operator is wearing eye protection and

• The unit is at waist level

• The trimmer attachment is parallel to the

TIPS FOR BEST TRIMMING RESULTS

Optional Accessory!

Please refer to the Plug-In Power Start or Power Bit Start 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.)

ON (I) position at all times (Fig. 9).

Start Lever (Fig. 10) down to the start/closed position and continue to step 3. DO NOT flip this lever down if the temperature is above 40°E

of fuel should be visible in the primer bulb (Fig. 10). Iffuel can not be seen in the bulb, press and release the bulb until fuel is visible.

Start or Power Bit Start into the back of the unit. Refer to Operation section of the Plug-In Power Start or Power Bit Start operator's manual.

In Power Start or drill's ON (I) button for 2 second intervals until unit

starts.

Start Lever back up to the run/open position.

rear of the unit and wait 60 seconds; then squeeze the throttle control.

to letthe engine warm up. The unit may be used during this time.

comes to a complete stop. (Fig. 9)

to reduce the risk of injury when operating this unit.

proper clothing

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

hand is holding the shaft grip

The operator's left arm is slightly bent, the

left hand holding the D-handle

ground and easily contacts the grass without the need to bend over

Keep the trimmer attachment parallel to

the ground. Trim only when grass and weeds are dry.

Fig. 12

44j_

• The cutting head and shield are designzed to allow the unit to cut in either direction, from right to left or left to right.

The life of the trimmer line is dependent upon:

Following the trimming tips

- What vegetation is being cut

- Where vegetation is being cut _

DECORATIVE TRIMMING Decorative trimming is accomplished by _j_

removing all vegetation around trees, posts, Fig.13 fences and more. Rotate the whole unit so

that the trimmer attachment is at a 30° angle to the ground (Fig. 13).

MAINTENANCE SCHEDULE

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

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.

NOTE: Please read the California/EPA statement that came with the unit

FREQUENCY MAINTENANCE REQUIRED SEE Every 10 hours Clean air filter p. 8

At 10 hours Change oil p. 7

Every 40 Change oil p. 7

HASSLE-FREE TM 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 isdesigned for cutting

larger weeds and light brush. NOTE: Before inserting new line

1. Remove the old line and line

2. Clean entire surface of

3. Reinstall line glide plate (Fig.14).

NOTE: Line glide plate must be Fig. 15

4. Insert both ends of your line through the proper holes in the side of the

5. Pull the line and make sure the line is against the hub and is fully

6. Correctly installed line will be the same length on both sides.

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

For these types of repairs call 1-800-4-MY-HOME® for more

information.

for a complete listing of terms and coverage for the emissions control devices, such as the spark arrestor, muffler, carburetor, etc

Check rocker arm to valve clearance and adjust p. 8 Check spark plug condition and gap p. 9

into the holes in the Arrow cutting head, identify the proper holes. Follow

directions as shown on

the glide plate. Do Not

attempt to remove the cutting head from the

unit when replacing line.

glide plate from the cutting Fig. 14 head.

Align arrow with: Holes cutting head.

A- when using medium (red) or .¢-.._

large (black)line

B- when using lines with

diameters smaller than medium (red)line

reinstalled in cutting head before inserting new line.

cutting head (Fig. 15).

extended through the positioning tunnels (Fig. 16).

Cuttinc Head

Glide Plate

Positioning TunnelSome 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

CHECKING THE OIL LEVEL The importance of checking and

maintaining the proper oil level in

the crankcase cannot be overemphasized. Check oil before

each use:

1. Stop the engine and allow oil

2. Place the engine on a flat,

3. Keep dirt, grass clippings and

4. Remove the oil fill plug.

5. Look into the oil fill hole; use

6. If the oil level is not touching

NOTE: Do not overfill the unit. NOTE: Make sure the O-ring is

CHANGING THE OIL

For a new engine, change the oil

after the first 10 hours of operation. Change the oil while the engine is still warm. The oil will

flow freely and carry away more

impurities.

1. Remove the oil fill plug.

2. Pour the oil out of the oil fill

3. Wipe up any oil residue on the unit and clean up any oil that may have

4. Refill the crankcase with 3.04 fl.oz. (90 ml) of SAE 30 SF, SG, SH oil.

trimming line may become worn unevenly which may cause excessive vibrations in the unit. If this becomes uncomfortable or

uncontrollable, stop the unit and replace the line.

Refer to the Line Replacement instructions ("

above.

to drain into the crankcase.

level surface with the cutting head shield hanging off a

work bench or table to get a

proper oil level reading (Fig.

17).

other debris out of the engine.

Clean the area around the oil

fill plug before removing it.

a flashlight if needed. The oil should be just touching the

inner most thread (Fig. 18).

the inner most thread on the oil fill hole, add a small amount of

oil to the oil fill hole and

recheck (Fig. 18). Repeat this procedure until the oil level

reaches the innermost thread

on the oil fill hole.

in place on the oil fill plug when checking and

changing the oil (Fig. 19).

hole and into a container by

tipping the unit to a vertical

position (Fig. 20). Allow

ample time for complete drainage.

spilled. Dispose of the oil according to Federal, State and local

regulations.

Oil Fill Plug

Fig. 16

Fig. 17

Oil Max Fill Line

Fig. 18

Fig. 21

NOTE:Usethebottleand

spoutsavedfrominitial

usetomeasurethe correctamountofoil.

Thetopofthelabelon

thebottlemeasures

Fill Line

approximately3.04fl.oz. (90ml)(Fig.22).Check

thelevel,SeeChecking

theOilLevel.Ifthelevel

islow,addasmall amountofoiland

Fig. 22

recheck.Donotoverfill(Fig.21).

5. Replacetheoilfillplug.

6. Reconnectthesparkplugboot.

AIR FILTER MAINTENANCE

m ]_L_ ARNING: To avoid serious personal injury, always turn the

Cleaning the Air Filter Clean and re-oil the air filter every 10 hours of operation. It is an important

item to maintain. Failure to maintain the air filter properly can result in poor performance or can cause permanent damage to the engine.

1. Open the air filter cover. Push Air Fiffer Cover

2. Remove the air filter Air Fiffer

3. Wash the filter in detergent

4. Apply enough clean SAE 30

5. Squeeze the filter to spread

6. Replace the filter (Fig. 24). Air Filter NOTE: If operating the unit

7. Reinstall the air filter cover.

8. Swing the cover down until the tab on the air filter backplate snaps into IDLE SPEED ADJUSTMENT

i _. j WARNING: The cutting attachment may spin during idle speed j

The idle speed of the engine is adjustable. An idle adjustment screw is between the air filter cover and the engine starter housing (Fig. 25).

NOTE: Careless adjustments can seriously damage the unit. Aside from

If, after checking the fuel 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 at a high idle for a minute to warm up.

2. Release the throttle trigger and let the engine idle. If the engine stops,

NOTE: The cutting attachment Idle Adjustment

3. If the cutting attachment

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

the tab on the under side of the cover inward. Then pull

the air filter cover out and up. (Fig. 23).

(Fig. 24). and water. Rinse the filter Tab

thoroughly and allow it to dry. Fig. 23 motor oil to lightly coat the Rack Tabs

filter.

and remove excess oil.

without the air filter,

WILL VOID the warranty. Locking Tab

Position the slots on the top Fig. 24 of the air filter cover onto the tabs at the top of the back plate (Fig. 23).

place in the slot on the air filter cover (Fig. 23).

adjustments. Wear protective clothing and observe all safety

instructions to prevent serious personal injury.

idle speed, only a Sears or other qualified service dealer should make carburetor adjustments.

Refer to Starting/Stopping Instructions.

insert a small phillips in between the Air Filter Cover and the Engine Cover (Fig. 25). Turn the idle speed screw in, clockwise, 1/8 of a turn at

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

should not rotate when Screw

the engine idles.

rotates when the engine idles, turn the idle speed

screw counterclockwise 1/8 of a turn at a time (as

needed), to reduce idle speed.

Fig. 25

Checking the fuel, cleaning the air filter, and adjusting the idle speed should solve most engine problems. If not and any of the following are true have the

unit serviced by a Sears or other qualified service dealer:

• the engine will not idle

• the engine hesitates or stalls on acceleration there is a loss of engine power

ROCKER ARM CLEARANCE

I J_, WARNING: To avoid serious personal injury, always turn the

un t off and a ow it to cool before cleaning or maintaining it.

This requires disassembly of the engine. If unsure or unqualified to perform this, take the unit to a Sears or other qualified service dealer.

The engine must be cold when checking or adjusting the valve clearance.

• This task should be performed inside, in a clean, dust free area.

1. Remove the six (6) screws on the back of the engine cover with a Flat- head or T-25 Torx screwdriver (Fig. 26).

2. Disconnect the spark plug wire.

3. Clean dirt from around the View of the Rear Engine Cover

spark plug. Remove the spark plug from the cylinder head by

turning a 5/8 in. socket counterclockwise. Screws Screws

4. Remove the engine cover (Fig. 26).

5. Clean dirt from around the rocker arm cover. Remove

the screw holding the rocker Fig. 26 arm cover with a large flat

blade screwdriver or Torx T- 25 bit (Fig. 27). Remove the Screw ---------_

rocker arm cover and gasket. Rocker Arm

6. Pull the starter rope slowly to Cover bring the piston to the top of

its travel, (known as top dead Spark Plue! center). Check that: Hole

The piston isat the top of its travel. This should be done by

looking into the spark plug hole. (Fig. 27) Fig. 27

Both rocker arms move freely, Adjusting Nuts

and both valves are closed

If these statements are not true, INTAKE

repeat step 6.

7. Slide the feeler gauge between EXHAUST the rocker arm and the valve Rocker

return spring. Measure the Arms clearance between the valve

stem and rocker arm (Fig. 28).

Measure both the intake and

exhaust valves. Fig. 28

The recommended clearance for Exhaust Rocker Arm both intake and exhaust is .003 - Nut _ ,/ Feeler

standard automotive .005 in. ! (0.127 mm) feeler gauge. The

.006 in. (.076 - 0.152 mm). Use a c___= Gauge_

feeler gauge should slide between 0.003-0.006 in. with a slight amount of resistance,

the rocker arm and valve stem (0.076-0.152 ram) without binding. See Figures 28

and 29. _ Valve Stem

8. If the clearance is not within Fig. 29

specification:

a. Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver

(Fig. 29). To increase clearance, turn the adjusting nut counterclockwise. To decrease clearance, turn the adjusting nut clockwise.

b. Recheck both clearances, and adjust as necessary.

9. Reinstall the rocker arm cover using a new gasket. Torque the screw to 20-30 inolb (2.2-3.4 Nora).

10. Check the spark plug and reinstall. See Replacing the Spark Plug.

11. Replace the spark plug wire.

12. Reinstall the engine cover. Check alignment of the cover before tightening the screws. Tighten screws.

Adjusting _- _ /

REPLACING THE SPARK PLUG

Use a replacement Champion ® #RDZ4H spark plug. The correct air gap is 0.025 in. (0.635 rnrn). Remove the plug after every 40 hours of operation

and check its condition.

1. Stop the engine and allow it to cool. Remove the six (6) screws on the back of the engine cover with a Flat-head or T-25 Torx screwdriver (Fig. 26).

2. Grasp the plug wire firmly and pull the cap from the spark plug.

I _k I WARNING: Do not sand blast, scrape or clean spark plug

-- ]

_ electrodes. Grit in

3. Clean dirt from around the J I spark plug. Remove the spark plug from the cylinder head by

turning a 5/8 in. socket counterclockwise. , .

4. Replace cracked, fouled or "EZZZZZ_ dirty spark plug. Set the air

gap at 0.025 in. (0.635 rnrn) ,_ using a feeler gauge (Fig. 30). 0.025 in.

5. Install a correctly-gapped t spark plug in the cylinder Fig. 30

head. Turn the 5/8 in. socket clockwise until snug.

If using a torque wrench torque to: 110=120 in.olb. (12.3=13.5 Norn) Do not over=tighten. CLEANING

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 the unit with fuel in the tank where fumes may reach an open flame or spark.

Allow the engine to cool before storing. Lock up the unit 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

1. Drain all gasoline from the gas tank into a container. Do not use gas that has been stored for more than 30 days. Dispose of the old gasoline

in accordance to Federal, State, and Local regulations.

2. Start the engine and allow it to run until it stalls. This ensures that all gasoline has been drained from the carburetor.

3. Allow the engine to cool. Remove the spark plug and put 5 drops 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

4. Change the oil, referring to Changing the Oil. Dispose of the old oil in

5. Thoroughly clean the unit and inspect for any loose or damaged parts.

TRANSPORTING

• Tighten gas cap before transporting.

before attempting to start the trimmer after storage.

accordance to Federal, State and Local regulations.

Repair or replace damaged parts and tighten loose screws, nuts or bolts. The unit is ready for storage.

Allow the engine to cool before transporting. Secure the unit while transporting. Drain the gas tank before transporting.

the

engine could damage the cylinder.

(0.635ram)

t I

PLUG=IN POWER START AND POWER BiT I 4_

START FEATURES This unit can be started with an optional Plug-In

Power Start or Power Bit Start, (items may be

sold separately). If choosing to start the unit

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

call 1=800=4-MY=HOME® for more information and purchasing. You may also go to \.

www.craftsman.com.

iTEM NO. DESCRIPTION

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

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

Electric Start Feature

PROBLEM SOLUTION

Empty fuel tank

Old fuel

Air filter is plugged

Cold Weather Lever is closed

Old fuel

Fill fuel tank with fuel

Drain gas tank and add fresh fuel

Replace or clean the air filter

Move the Cold Weather Lever to the open position.

Drain gas tank and add fresh fuel

LP? iii

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Craftsman 316.791210 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual