Hitachi CS 27EPAP(S) Service Manual page 3

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