Carburetor Adjustments, BAR Maintenance

Muffler Diffuser

Spark

Arresting

Screen

Muffler

Cover

Screws

Muffler Muffler

BodyCover

Cleaning is required every 25 hours of op- eration or annually, whichever comes first. S Loosen and remove the 2 muffler cover

screws.

SRemove the muffler cover (cover snaps off

muffler body).

SRemove muffler diffuser and spark arrest-

ing screen assembly. Notice the orienta- tion of these parts for reassembling.

SClean the spark arrestor screen with a wire

brush. Replace screen if breaks are found.S Replace any broken or cracked muffler parts.

SReinstall diffuser and spark arrestor screen assembly with round holes facing up.

SReinstall muffler cover and 2 screws (7-8 ft/lbs).

CARBURETOR ADJUSTMENTS

Your carburetor is equipped with limiter caps. Carburetor adjustment is a compli- cated task. We recommend that you take your unit to an Authorized Service Dealer. Damage will occur if you turn the needles be- yond the limiter stops.

BAR MAINTENANCE

If your saw cuts to one side, has to be forced through the cut, or been run with an improper amount of bar lubrication it may be neces- sary to service your bar. A worn bar will dam- age your chain and make cutting difficult.

After each use, ensure ON/STOP switch is in the STOP position, then clean all sawdust from the guide bar and sprocket hole.

To maintain guide bar:

SMove ON/STOP switch to the STOP posi-

tion.

SLoosen and remove chain brake nuts and chain brake. Remove bar and chain from saw.

S Clean the oil holes and bar groove after each 5 hours of operation.

Remove Sawdust From

Guide Bar Groove

Sprocket Hole

Oil Holes

SAdd lubricant to sprocket hole after each use.

S Burring of guide bar rails is a normal process of rail wear. Remove these burrs with a flat file.

SWhen rail top is uneven, use a flat file to re- store square edges and sides.

File Rail Edges

and Sides

Square

Worn Groove

Correct Groove

Replace guide bar when the groove is worn, the guide bar is bent or cracked, or when excess heating or burring of the rails occurs. If replacement is necessary, use only the guide bar specified for your saw in the repair parts list or on the decal located on the chain saw.

CHAIN SHARPENING

Chain sharpening is a complicated task that requires special tools. We recommended you refer chain sharpening to a professional chain sharpener.

IGNITION TIMING

Ignition timing is fixed and nonadjustable.

SPARK PLUG

The spark plug should be replaced each year to ensure the engine starts easier and runs better.

SLoosen 3 screws on cylinder cover.S Remove the cylinder cover.

SPull off the spark plug boot.

SRemove spark plug from cylinder and dis-

card.

SReplace with Champion RCJ--7Y spark plug and tighten with a 3/4 inch socket wrench (10-12 ft/lbs). Spark plug gap should be 0.025 inches.

SReinstall the spark plug boot.SReinstall the cylinder cover and 3 screws (15-20 in/ lbs).

ScrewsCylinder

Cover

Spark

Plug Boot

Spark

Plug

STORAGE

WARNING: Stop engine and allow to cool, and secure the unit before storing or transporting in a vehicle. Store unit and fuel in an area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc. Store unit with all guards in place. Position so that any sharp object cannot accidentally cause injury to passersby. Store the unit out of reach of children.

SBefore storing, drain all fuel from the unit.

Start engine and allow to run until it stops.

SClean the unit before storing. Pay particu- lar attention to the air intake area, keeping it free of debris. Use a mild detergent and

sponge to clean the plastic surfaces.

SDo not store the unit or fuel in a closed area where fuel vapors can reach sparks or an