Hitachi CS 33EDP Service Manual page 2

1. Troubleshooting and correction
Trouble
The crank shaft does
Starter
not rotate.
handle
cannot be
pulled.
The recoil starter
does not rotate.
No compression
Short-circuited due to foreign matter between the spark plug
electrodes.
No spark
Startup is
impossible.
The spark plug does
not become wet with
fuel after repeated
starting operation.
The spark plug is wet
due to excessive fuel
supplied.
Weak spark
Idling stops
Low compression
although
startup is
possible.
Good spark and
compression
TROUBLESHOOTING GUIDE
Faulty piston ring
Seized piston and cylinder
Faulty crank shaft bearings
Magneto rotor contact with ignition coil
Broken recoil starter
Faulty starter pawl
Clogging of dirt in starter pawl
Faulty piston ring
Worn piston
Worn cylinder
Stop switch not at startup position
Dirty or faulty spark plug
Improperly connected plug cap
Disconnected or improperly connected
high voltage cord
Ground connection of high voltage
cord
Disconnected or faulty ignition coil
ass'y
Large gap between the magneto rotor
circumference and ignition coil ass'y
No fuel in the fuel tank
Clogged fuel filter
Faulty fuel pipe
Faulty vent hole (inner cap) on the fuel
tank
Faulty carburetor ass'y
Pulling the starter handle several
times while the choke lever is at the
"startup" position.
Dirty or faulty spark plug
Improper air gap
Worn piston ring
Worn piston
Worn cylinder
Revolutions too low for idling
Poorly adjusted carburetor ass'y
Defective sealing of the packing
Cause
-1-
Corrective action
Disassemble and
replace.
Inspect and replace.
Clean.
Replace.
Remove foreign matter:
In case of frequent
occurrence, disassemble
and clean the engine.
Adjust to startup position.
Clean or replace.
Inspect and replace.
Repair or replace.
Repair.
Replace.
Adjust.
Add properly mixed fuel
(25:1 to 50:1).
Clean or replace.
Adjust, replace or
connect.
Replace.
Adjust, clean or replace.
Dry the spark plug.
Remove excessive fuel.
Clean or replace.
Adjust.
Replace.
Adjust.
Replace.