Table 2

Ouput (engine speed) insufficient

Engine keeps running, but chain does not cut clean

Output (engine speed) sufficient

Engine overheated

Firing function defective

Carburetor defective

Other troubles

Chain does not cut clean

Chain stops (Clutch slips)

Chain poorly lubricated

Improper fuel used ........................................

Use fuel with correct mixing ratio. Never use

 

gasoline of poor quality.

Spark plug defective (worn) ...........................

Replace.

As cooling fins clogged, air

 

does not pass well ........................................

Clean fins.

Excessive deposits in

 

combustion chamber .....................................

Disassemble and remove carbon.

Plug damaged or fouled ................................

Replace or clean.

Combustion poor due to

 

defective wiring ............................................

Check wiring.

High-speed needle setting incorrect .............

Readjust.

Carburetor overflow ......................................

Refer to Table 1.

Air cleaner clogged .....................................

Clean as necessary.

Compression insufficient

 

(piston ring stuck or worn out) ......................

Disassemble, check and replace if necessary.

Cylinder chromium plating peeled .................

Replace cylinder

or worn out

 

Exhaust port clogged with carbon .................

Clean as necessary.

Throttle is not fully open ................................

Readjust.

Chain tension incorrect ................................

Adjust.

Chain wrongly set .........................................

Set correctly.

Depth incorrect ............................................

Readjust.

Chain saw pressed against

 

tree to firmly .................................................

Press lightly.

Clutch shoe worn out ....................................

Replace.

No oil in tank ................................................

Refill.

Oil delivery incorrect .....................................

Adjust.

Oil contaminated with dust ............................

Rinse tank and fill with new oil..

Oil viscosity inappropriate .............................

Use oil with correct viscosity for summer or winter.

WARNING DANGER

Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury may result.

24