Hitachi CS 33EDT Service Manual

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

Hitachi CS 33EDT Specifications

General

Brand	Hitachi
Model	CS 33EDT
Category	Chainsaw
Language	English