-2-
Problem
Cause
Corrective action
Engine
starts but ...
Engine speed fluctuates.
Clogged carburetor ass’y
Clean.
Defective carburetor ass’y
Check or replace.
Consumes excessive fuel.
Defective carburetor ass’y
Check or replace.
Clogged cleaner element of cleaner
ass’y
Clean.
Saw chain rotates at idling
speed.
Improper idling adjustment
Adjust.
Worn clutch section
Replace.
Degraded clutch spring
Replace.
Chain oil is not discharged.
Insufficient amount of chain oil in
the oil tank
Supply chain oil.
Clogged chain oil discharge port
Clean.
Clogged oil filler port on the chain
bar
Clogged oil filter
Poor adjustment of chain oil
discharge amount
Adjust.
Crack of fuel pipes
Replace.