Craftsman 316791841 Owner’s Manual

Operator's Manual

4-Cycle

GAS TRIMMER

Model No. 316.791841

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=05841P00 6/21

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 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: Failureto 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®.

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.)

• iMPORTANT SAFETY iNSTRUCTiONS

READ ALL INSTRUCTIONS BEFORE OPERATING

• Read the instructions carefully. Befamiliar 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 approached, stop the unit immediately. Use only Craftsman Hassle-Free TM XTRA QUIET Spiral Line as replacement

line. Never use metal-reinforced line, wire or rope. These can break off and 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

-- 1_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 in a 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 ifthe 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.

• Besurethecuttingattachmentisnotincontactwithanythingbeforestarting

theunit. Usetheunitonlyindaylightorgoodartificiallight.

Avoidaccidentalstarting.Beinthestartingpositionwheneverpullingthe starterrope.Theoperatorandunitmustbeinastablepositionwhilestarting.

SeeStarting/StoppingInstructions. 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

= 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.

cuttingattachmentorotherattachments.

Useonlyoriginalequipmentmanufacturerreplacementpartsandaccessories

forthisunit.TheseareavailablefromSearsorotherauthorizedservicedealer.

Useofanyunauthorizedpartsoraccessoriescouldleadtoseriousinjuryto

theuser,ordamagetotheunit,andvoidthewarranty.

Keepunitcleanofvegetationandothermaterials.Theymaybecomelodged

betweenthecuttingattachmentandshield. Toreducefirehazard,replacefaultymufflerandsparkarrestor.Keepthe

engineandmufflerfreefromgrass,leavesorotherdebris.

OTHER SAFETY WARNINGS

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 ina dry area, 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 the Cleaning and Storage instructions.

• Keep these instructions. Refer to them often and use them to instruct other users. If loaning someone this unit, also loan them these instructions.

SAVE THESE INSTRUCTIONS

SYMBOL MEANING

_iiiii!}i,iiii'_i:_

iiiiiiiiii!iiii_!i:ii_

_i'_iiiiiiN

iiiiiliii_

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

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 Rope

Grip

D-Handle

Attachment

Shaft

Hassle Free ® Cutting Head

On/Oft Control

Convertable TM

Coupler Air Filter

Line Cutting

Blade

Cutting Head Shield

Shaft Grip

Throttle

Control

Cover

Oil Fill Plug

Fuel Cap

Choke Lever

Primer Bulb

ADJUSTING THE D=NANDLE Shaft Grip D-Handme

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

secure. Screw

OPERATING THE Fig. 1 CONVERTIBLE TM COUPLER SYSTEM

and understand the manual that came with the attachment. Folio

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

_L__] 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

INSTALLING THE TRIMMER ATTACHMENT OR OTHER 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 THE TRIMMER ATTACHMENT OR OTHER ATTACHMENT

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

Cultivator Turbo Blower Brushcutter

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 Remease Button

Coup,er X /

Fig. 2

Primary Home

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

SERIOUS PERSONAL INJURY. Check and maintain the proper oil level in the crankcase; it is important and cannot be

_ ARNING: OVERFILLING OIL CRANKCASE MAY CAUSE

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 can be used to measure the correct

1. Unscrew the top of the bottle

2. Place unit on a flat, level

3. Remove the oil fill plug from the Funnel

4. Pour the entire bottle of oil

NOTE: Never add oil to the fuel Fig. 5

5. Wipe up any oil that may

Check oil before each use and change as needed. Refer to

Checking the Oil Level. RECOMMENDED FUEL TYPE

Old fuel is the primary reason for improper unit performance. Be

sure to use fresh, clean, unleaded oil FilmHome i gasoline. Fig. 6

NOTE: Dispose of the old

NOTE: This is a four cycle

Definition of Blended Fuels Hole

Today's fuels are often a blend of

gasoline and oxygenates such as ethanol, methanol or MTBE (ether). Fig. 7

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 60

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

• Use the fuel additive STA-BIL® or an equivalent

• Drain tank and run the engine dry before storing unit Using Fuel Additives

overemphasized. Check the oil before each use and change it as needed. See Changing the Oil.

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

amount during future oil changes. See Changing the Oil.

of oil and remove the paper seal covering the opening. Replace the top. Next, cut

the tip off the funnel spout

(Fig. 5).

surface. /

crankcase (Fig. 7). Spout

into the oil fill hole (Fig. 6).

or fuel tank.

have spilled and reinstall the oil fill plug.

gasoline in accordance Oil Fill Plug to Federal, State and

Local regulations.

engine. In order to avoid damage to the unit, do O-Ring

not mix oil with

gasoline.

Oil Fill

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.

WARNING: Add fuel ina clean, well ventilated outdoor area. Wipe

up any spilled fuel immediately. Avoid creating a source of ignition for

spilt fuel. Do not start the engine until fuel vapors dissipate.

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. FUELING THE UNIT

-- i

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

I _i_ IWARNING: DO NOT USE E85 FUEL IN THiS UNIT. It has i

1. Remove the fuel cap (Fig. 8). Gas Can S

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. FuelTank

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

been proven that fuel containing greater than 15% ethanol will likely damage this engine and void the warranty.

)out

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.

Fig. 8

Cap

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

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

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

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

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

NOTE: This unit uses the Incredi-PuIF Mstarting 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 is vastly different from (and much easier than) previous starting techniques.

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

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.

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

position at all times (Fig. 9).

conditions (below 40°F), flip the Cold Weather 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 40OR

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

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

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.

Run/Open

Close/Start

Throttle Control

Fig. 9

Cold Weather Primer Bulb Starter Lever

Fig. 10

6. Continue squeezing the Starting throttle control for an Position

additional 30 to 60 seconds to let the engine warm up. The

unit may be used during this time.

IF,.. The engine does not start,

IF,.. The engine stops while

STOPPING INSTRUCTIONS

1. Release the throttle control

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_ WARNING: 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

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

,, The operator's left arm is slightly bent, the

,, The unit is at waist level ,, The trimmer attachment is parallel to the

go back to step 3.

squeezing the throttle, go back to step 4. Throttle Control

Fig. 11

and allow the engine to cool down by idling.

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

comes to a complete stop. (Fig. 9)

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°R

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

hand is holding the shaft grip

left hand holding the D-handle

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

Fig. 12

TiPS FOR BEST TRIMMING RESULTS

• Keep the trimmer attachment parallel to the ground.

• Trim only when grass and weeds are dry. 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 4._

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

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

MAINTENANCE SCHEDULE

-- j

_ 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. If

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

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

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

unsure about these procedures take the unit to Sears or other qualified service dealer. Call 1-800-4-MY-HOME® for more information.

and system may be performed by a Sears or other qualified service dealer. Call 1-800-4-MY-HOME® for more information.

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

Clean spark arrestor 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.

cutting head.

Align arrow with:

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.

Cuttinc Head

Glide Plate

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

the side of the cutting head

(Fig. 15).

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

is fully extended through the positioning tunnels (Fig. 16).

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

sides.

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 linemay become worn unevenly which

CHECKING THE OiL LEVEL

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

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

m i

_L_ CAUTION: Wear gloves to prevent injury when handling the unit.

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

may cause excessive vibrations in the unit. If this becomes uncomfortable or uncontrollable, stop the unitand replace the line. Refer

to the Line Replacement instructions above.

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

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.

Positioning Tunnel

Fig. 16

r-sq

Fig. 17

Oil Max Fill Line

Fig. 18

Oil Fill Plug

Fig. 20

Wipe up any oil residue on the unit and clean up any oil

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

regulations.

4. Refill the crankcase with

3.04 fl.oz. (90 ml) of SAE 30 SF, SG, SH oil.

NOTE: Use the bottle and

spout saved from initial use to measure the

correct amount of oil.

The top of the label on the bottle measures

approximately 3.04 fl.oz.

(90 ml) (Fig. 22). Check the level, See Checking the Oil Level. If the level

is low, add a small

amount of oil and

recheck. Do not overfill

(Fig. 21).

5. Replace the oil fill plug.

6. Reconnect the spark plug boot. AIR FILTER MAINTENANCE

-- i_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 i

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

2. Remove the air filter

3. Wash the filter in detergent

4. Apply enough clean SAE 30

5. Squeeze the filter to spread and

6. Replace the filter (Fig. 27). NOTE: If operating the unit

7. Reinstall the air filter cover.

8. Swing the cover down until

IDLE SPEED ADJUSTMENT The idle speed of the engine is

adjustable. An idle adjustment screw is between the air filter

cover and the engine starter housing (Fig. 28). NOTE: Careless adjustments can seriously damage the unit. Aside from

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. 27).

and water (Fig. 24). Rinse the filter thoroughly and allow it to

dry.

motor oil to lightly coat the filter (Fig. 25).

remove excess oil (Fig. 26).

without the air filter, WiLL VOiD the warranty.

Position the slots on the top of the air filter cover onto the

tabs at the top of the back plate (Fig. 23).

the tab on the air filter backplate snaps into place in

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

idle speed, only a Sears or other qualified service dealer should

make carburetor adjustments.

Fill Line

Fig. 21

Fig. 22

Air Filter Cover

Air Filter

Tab

Fig. 23

Fig. 24

Fig. 25

Fig. 26

First, Check Fuel Old fuel is usually the reason for

improper unit performance. Drain and refill the tank with fresh fuel

prior to making any adjustments.

Refer to Oil and Fuel Information.

Second, 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. 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.

Third, Adjust Idle Speed Screw

I _ _WARNING: The cutting attachment may spin during idle speed

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 mdmeAdjustment

2. Release the throttle trigger

NOTE: The cutting attachment should not rotate when the engine idles.

3. If the cutting attachment rotates when the engine idles, turn the idle

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:

ROCKER ARM CLEARANCE

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

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

NOTE: Inspect the valve to View of the Rear Engine Cover

1. Remove the six (6) screws on

2. Disconnect the spark plug wire.

3. Clean dirt from around the

4. Remove the engine cover

adjustments. Wear protective clothing and observe all safety instructions to prevent serious personal injury.

at a high idle for a minute to Screw warm up. Refer to Starting/Stopping

Instructions.

and let the engine idle. If the engine stops, insert a small

phillips in between the Air

Filter Cover and the Engine

Cover (Fig. 28). Turn the idle Fig. 28 speed screw in, clockwise, 1/8 of a turn at a time (as needed) until the

engine idles smoothly.

speed screw counterclockwise 1/8 of a turn at a time (as needed), to reduce idle speed.

• the engine will not idle the engine hesitates or stalls on acceleration

there is a loss of engine power

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

rocker arm clearance with a feeler gauge after

the first 10 hours of operation and every 40

hours of operation.

The engine must be cold when checking or adjusting the valve

clearance. This task should be performed

inside, in a clean, dust free area.

the back of the engine cover with a Flat-head or T-25 Torx

screwdriver (Fig. 29).

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

turning a 5/8 in. socket counterclockwise.

(Fig. 29). Clean dirt from around the rocker arm cover. Remove the screw holding

the rocker arm cover with a large flat blade screwdriver or Torx T-25 bit (Fig. 30). Remove the rocker arm cover and gasket.

Pull the starter rope slowly to bring the piston to the top of its travel,

(known as top dead center). Check that:

Air Flit

Screws

Rocker Arm

Cover

Spark Pluq

Hole

Fig. 27

Fig. 29

Screw_

Fig. 30

Tabs

Locking Tab

Screws

• The piston is at the top of its travel. This should be done by

looking into the spark plug hole. (Fig.30)

• Both rocker arms move freely, and both valves are closed

If these statements are not true, repeat step 6.

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

return spring. Measure the clearance between the valve

stem and rocker arm (Fig.32). Measure both the intake and

exhaust valves.

The recommended clearance for both intake and exhaust is .003 -

.006 in. (.076- 0.152 mm). Use a standard automotive .005 in.

(0.127 mm) feeler gauge. The feeler gauge should slide between

the rocker arm and valve stem with a slight amount of resistance, without binding. See Figures 31 and 32.

8. If the clearance is not within specification:

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

(Fig. 32).

• 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 Nom).

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.

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. 29).

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

3. Clean dirt from around the spark plug. Remove the spark plug from the

-- iWARNING: Do not sand blast, scrape or clean spark plug

4. Replace cracked, fouled or

5. Install a correctly-gapped

If using a torque wrench torque to: 110-120 in.olb. (12.3-13.5 Nora}

Do not over-tighten. SPARK ARRESTOR MAINTENANCE

electrodes. Grit in the engine could damage the cylinder.

cylinder head by turning a 5/8 in. socket counterclockwise.

dirty spark plug. Set the air gap at 0.025 in. {0.635 rnrn)

using a feeler gauge (Fig. 33).

spark plug in the cylinder head. Turn the 5/8 in. socket

clockwise until snug.

Remove the rear engine cover. See Rocker Arm Clearance. With a flat blade screwdriver or Torx T-20 bit and a T-25 bit, remove the

screws attaching the spark arrestor cover to the muffler (Fig. 34). Pull the tab on the spark arrestor cover out of the muffler. Remove the

spark arrestor cover. Remove the spark arrestor

screen from the spark arrestor cover.

Clean the spark arrestor screen with a wire brush or

replace it. Reinstall the spark arrestor

screen, spark arrestor cover and screws.

Rocker

Arms

Exhaust Rocker Arm

Adjusting __ /

0.003-0.005in. ,L_L__Z,____'J r

(0.076-0.152 ram)

{0.635 ram)

Muffmer Spark Arrestor

Slot

INTAKE

Fig. 31

Nut __ ./ Feeler

Fig. 32

0.025 in.

Fig. 33

1"-20Screw _

Fig. 34

Adjusting Nuts CLEANING

EXHAUST

Gauge

Valve Stem

Cover

1"-25

Screw

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

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

LONG TERM STORAGE

1. Drain all gasoline from the gas tank into a container. Do not use gas

2. Start the engine and allow it to run until it stalls. This ensures that all

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

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.

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.craftsman.com.

item No. Description

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

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

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

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.

that has been stored for more than 60 days. Dispose of the old gasoline

in accordance to Federal, State, and Local regulations.

gasoline has been drained from the carburetor.

high quality motor oil into the cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.

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.

Electric Start Feature

PROBLEM

SOLUTION

Empty fuel tank Pdmer bulb wasr,t Piessed enough

Old fuel Fouled sparkplug Replace or clean the spark plug

Plugged spark arrestor

Fill fuel tank with fuel PreSs Primer bulb fully and Slowly i0 times

Drain gas tank and add fresh fuel

Clean or replace spark arrestor

. _

Air filter is plugged Old fuei

Improper idle speed

Old fuel Improper carburetor adjustment ' Take to sears or other qualified service dealer for an adjustment Cutting attachment bound with grass Stop the engine and clean the cutting attachment Dirty airfilter

Plugged spark arrestor

Old fuel impropei carbUretor adjustment Take to sears oi other qualified Service dealer foian adjustment

Fouled spark plug Replace or clean the spark plug

Replace or clean the air filter

Drain gas tank and add tiesh fuel

Adjust according to the Idle Speed Adjustments section.

Drain gas tank and add fresh fuel

Clean or replace the air filter Clean or replace spark arrestor

Drain gas tank and add fresh fuel

Pluggedsparkarrestor ' Cleanorreplacesparkarrestor

+ 22 hidden pages

Craftsman 316791841 Owner’s Manual

Specifications and Main Features

Frequently Asked Questions

User Manual