Troubleshooting Guide; Troubleshooting And Correction - Hitachi CS 27EPAP(S) Service Manual

1. Troubleshooting and correction

Problem
Starter grip
Crank shaft does not turn.
cannot be
pulled.
Crank shaft turns.
Dry spark plug
Engine
does not
start.
No spark
No compression
Weak sparking
Engine
Weak compression
starts but
cannot
continue
idling.
Improper fuel-air mixture
Engine stops.
Engine
starts and
accelerates
Accelerates improperly.
but ...
(Engine does not rev up.)

TROUBLESHOOTING GUIDE

Seized piston ring
Seized connecting rod bearing
Seized piston and cylinder
Worn piston or cylinder
Defective starter body ass'y
Empty fuel tank
Clogged pump filter body comp.
Folded or improperly connected or
damaged shield tube ass'y
Defective air vent valve of tank cap
ass'y
Clogged carburetor ass'y
Defective carburetor ass'y
Stained or defective spark plug
Improperly connected high tension
cable and terminal
Damaged high tension cable
Improper air gap
Defective ignition coil ass'y
Defective stop switch
Improperly connected or damaged
internal wires
Defective piston ring
Defective oil seals of crank case ass'y
Stained or defective spark plug
Improper air gap
Defective ignition coil ass'y
Defective piston ring
Defective oil seals of crank case ass'y
Worn piston or cylinder
Clogged carburetor ass'y
Defective carburetor ass'y
Clogged pump filter body comp.
Folded or improperly connected or
damaged shield tube ass'y
Too low idling speed
Clogged carburetor ass'y
Defective carburetor ass'y
Clogged pump filter body comp.
Defective carburetor ass'y
Clogged cleaner element of cleaner
ass'y
Muffler clogged with carbon
Exhaust port of cylinder clogged with
carbon
Faulty ignition coil ass'y
Degraded fuel
Cause
-1-
Corrective action
Disassemble and
replace.
Replenish with fuel.
Clean or replace.
Check or replace.
Replace.
Clean.
Check or replace.
Clean or replace.
Check.
Replace.
Adjust.
Replace.
Replace.
Check or replace.
Replace.
Clean or replace.
Adjust.
Replace.
Replace.
Clean.
Check or replace.
Clean or replace.
Check or replace.
Adjust.
Clean.
Check or replace.
Clean or replace.
Check or replace.
Clean.
Clean.
Clean.
Replace
Replace