Hitachi CS 33EDP Service Manual page 3

Trouble
The engine stalls.
Starts, but
when
accelerating
Poor acceleration;
...
no increase in
revolutions
Fluctuating
revolutions at high
Starts, but
speed
...
Excessive fuel
consumption
Chain oil is not discharged.
Engine does not stop.
Cause
Clogged fuel filter
Insufficient warm-up
Poorly adjusted carburetor ass'y
Clogged cylinder vent passage,
exhaust port and/or carbon-clogged
muffler
Clogged air cleaner
Chain brake set on
Poorly adjusted carburetor ass'y
Dirt-clogged high-speed fuel line
Defective sealing of the packing
Faulty carburetor ass'y
Clogged air cleaner
Poorly adjusted carburetor ass'y
Insufficient amount of chain oil in the
oil tank
Clogged chain oil discharge port
Clogged oil filler port on the guide bar
Clogged oil filter
Poor adjustment of chain oil discharge
amount
Faulty oil pump
Use of high-viscosity chain oil (in cold
weather)
Disconnection of cord
Faulty stop switch
-2-
Corrective action
Clean or replace.
Warm up.
Adjust.
Clean.
Release.
Adjust, clean or replace.
Clean.
Replace.
Adjust, clean or replace.
Clean.
Adjust.
Replenish chain oil in the
oil tank.
Clean.
Properly adjust the chain
oil discharge amount.
Replace.
Use genuine or
low-viscosity chain oil
(for winter use).
Replace.
Replace.