Troubleshooting And Correction - Hitachi CS 33EDT Service Manual

1. Troubleshooting and correction

Situation
Starter handle The crank shaft
cannot be pulled. does not rotate.
The plug does not
become wet with
fuel after repeated
starting operation.
Startup is
impossible.
No spark
Short-circuited due to foreign matter between the plug
electrodes.
No compression
Weak spark
Idling stops
although startup
Low compression
is possible.
Good spark and
compression
The engine stalls.
Starts, but when
Poor acceleration;
accelerates ...
no increase in
revolutions
TROUBLESHOOTING GUIDE
Seizure of the piston ring
Seizure of the connecting rod
bearing
No fuel in the tank
Clogged fuel filter
Bent or broken fuel pipe, faulty
connection
Cracked fuel pipe
Faulty vent hole (check valve) on
the tank
Dirt clogging the carburetor
Poor throttling and pumping
Dirty or faulty plug
Improperly connected plug cap
Disconnected or improperly
connected high voltage cord
Faulty connection of the ignition
wire cap clasp to the high-voltage
wire
Ground connection of the high
voltage cord
Disconnected or faulty ignition coil
Faulty piston ring
Worn piston
Worn cylinder, crack
Expired service life of the oil seal
Degraded fuel
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
Faulty ignition coil
Muffler clogged with carbon
Clogged air cleaner
The chain brake is on.
Faulty ignition coil
Degraded fuel
Cause
-7-
Measure
Disassembly and parts
replacement
Replenishment
Cleaning or replacement
Repair
Replacement
Cleaning
Appropriate startup
method
Cleaning or replenishment
Inspection and
replacement
Repair or replacement
Repair
Replacement
Removal of foreign matter:
In case of frequent
occurrence, disassemble
and clean the engine.
Parts replacement
Replacement
Cleaning or replacement
Adjustment
Replacement
Adjustment
Cleaning or replacement
Replacement
Cleaning
Release
Replacement