Hitachi CG 25EUAP (L) Service Manual page 3

Problem
The engine stalls.
Starts, but when
it accelerates...
Poor acceleration;
no increase in rpm
Fluctuating rpm at
high speed
Starts, but ...
Excessive fuel
consumption
Chain oil is not discharged.
Cause
The fuel filter is clogged.
Loose nuts
Worn push rod
Valve
Worn valve
clearance is
Worn pivot
extended.
Worn rocker arm
Worn tappet
The muffler is clogged with
carbon.
The air cleaner is clogged.
Carbon accumulated on a valve.
The carburetor is clogged with
foreign matter.
The air cleaner is clogged.
The piston ring is worn.
The cylinder is worn.
The piston is deformed.
The oil seal is worn or damaged.
-2-
Corrective action
Clean or replace the part.
Repair the parts.
Replace the faulty part.
Clean the part.
Clean the part.
Clean the part.
Replace the faulty part.