Troubleshooting Guide - Hitachi CS 33EB Service Manual

Situation
Starter handle The crankshaft does
cannot be pulled. not rotate.
The plug does not
become wet with
fuel after repeated
startup operation.
Startup is
No spark
impossible.
Short-circuited due to foreign matter between
the plug electrodes.
No compression
Weak spark
Idling stops
although startup
is possible.
Low compression
Good spark and
compression
The engine stalls.
Starts, but when
Poor acceleration;
accelerating ...
no increase in
revolutions
Fluctuating revolutions
at high speed
Starts, but ...
Excessive fuel
consumption
Chain oil is not discharged.

TROUBLESHOOTING GUIDE

Seizure of the piston ring
Seizure of the connecting rod
bearing
No fuel in the tank
Clogged fuel filter
Faulty vent hole (check valve)
on the tank
Dirt clogging the carburetor
Poor throttling
Dirty or faulty plug
Improperly connected plug
cap
Disconnected or improperly
connected high voltage cord
Ground connection of the high
voltage cord
Disconnected or faulty ignition
coil
Faulty piston ring
Worn piston
Expired service life of the oil
seal
Dirty or faulty plug
Improper air gap
Worn piston ring
Expired service life of the oil
seal
Revolutions too low for idling
Clogged fuel filter
Muffler clogged with carbon
Clogged air cleaner
The chain brake is on.
Dirt clogging the high-speed
fuel line
Clogged air cleaner
No oil in the tank
Clogged oil filler port
Clogged oil filler port on the
guide bar
Clogged oil filter
-1-
Cause
Disassembly and parts
replacement
Replenishment
Cleaning or replacement
Replacement
Cleaning
Proper startup method
Cleaning or replacement
Inspection and replacement
Repair or replacement
Repair
Replacement
Removal of foreign matter;
disassemble and clean the
engine in case of frequent
occurrence.
Parts replacement
Cleaning or replacement
Adjustment
Replacement
Replacement
Adjustment
Cleaning or replacement
Cleaning
Release
Cleaning
Cleaning
Replenishment
Cleaning
Corrective action