145
N.B.:
The following troubleshooting guide does not cover all the
possible causes of faults. It may however prove useful as
a guide for basic fault fi ndingUse this manual to consult
the corresponding checking, adjusting and part renewal
procedures.
FAILURE TO START
ENGINE
.
Loose park plug.
.
Cylinder or cylinder head damaged.
.
Damaged cylinder head gasket.
.
Damaged cylinder gasket.
.
Cylinder worn or damaged.
.
Incorrect valve clearance.
.
Seized valve.
.
Wrongly fi tted piston ring.
.
Damaged, worn or fatigued piston ring.
.
Seized piston ring.
.
Seized or damaged piston.
.
Air fi lter incorrectly fi tted.
.
Air fi lter element obstructed.
.
Crankcase fi tted incorrectly.
.
Seized crankshaft.Cylinder head gasket damaged
FUEL SYSTEM
.
Fuel tank empty.
.
Fuel tank drain pipe blocked.
.
Altered or contaminated fuel.
.
Carburettor air suction blocked.
ELECTRICAL SYSTEMS
.
Flat battery.
.
Faulty battery.
.
Fuse blown, damaged or incorrect.
.
Fuse fi tted incorrectly.
.
Incorrect spark plug gap.
.
Oiled-up spark plug.
.
Electrode worn or damaged.
.
Insulation worn or damaged.
.
Faulty spark plug cap.
.
Primary or secondary coils broken or short-circuited.
.
Faulty spark plug cable.
.
Faulty main switch.
.
Faulty engine stop switch.
.
Broken or short-circuited wiring.
.
Faulty neutral light switch.
.
Faulty starter switch.
.
Loose connections.
.
Faulty starter motor.
9
TROUBLESHOOTING
Summary of Contents for MH7 Naked
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