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Table of Contents
TROUBLESHOOTING GUIDE
171
Troubleshooting-Guide
Engine Doesn't
Start; Starting
Difficulty
Starter motor
not
rotating
Starter motor
trouble
Battery voltage
low
Relay not contacting or operating
Starter button not
contacting
Wiring open or
shorted
Ignition switch
trouble
Engine stop switch off
Engine stop switch trouble
Fuse
blown
Starter
motor
rotating
but engine
doesn't start
Starter motor clutch trouble
Starter idler gear
slipping
on
the
shaft
Engine
won't turn over
Valve seizure
Cylinder, piston seizure
Crankshaft
seizure
Connecting rod
smal
l
end
seizure
Connecting
rod
big end seizure
Transmission gear or bearing seizure
Camshaft seizure
No fuel flow
No fuel
in
tank
Fuel tap turned off
Tank cap air vent
obstructed
Fuel tap
clogged
Fuel
line
clogged
Float
valve clogged
Engine flooded
Fuel
level
too high
Float valve worn or
stuck open
Starting technique faulty
(When flooded,
press
the
starter button with the
thro ttle
fully open to
allow
more air
to
reach
the engine.)
No spark;
spark
weak
Battery voltage
low
Spark plug
dirty,
damaged, or maladjusted
Spark plug cap or spark plug
lead
trouble
Spark plug cap shorted or
not
in
good contact
Contact
breaker
points
dirty
or
damaged
Contact
breaker
point gap maladjusted
Capacitor damaged
Ignition coil damaged
Ignition or engine stop
switch
shorted
Wiring shorted or open
Compression low
Spark
plug loose
Cylinder head
not
sufficiently
tightened down
No
valve
clearance
C):.linder, piston worn
Piston rings bad (worn, weak, broken, or sticking)
Piston ring/land
clearance
excessive
Cylinder
head
gasket
damaged
Cylinder
head
warped
Valve sticking
Valve .not closing
Valve spring broken or weak
Valve
not
seating properly
(valve bent,
warped, or
worn)
Poor Running at
Low
Speed
Spark weak
Battery voltage
low
Spark plug dirty, damaged, or maladjsuted
Spark plug cap or spark plug
lead
trouble
Spark plug cap
shorted
or not
in
good
contac
t
Spark
plug
incorrect
Contact breaker points
dirty
or damaged
Contact breaker point gap maladjusted
Capacitor damaged
Ignition coil damaged
Fuel/air
mixture incorrect
Pilot
screw(s)
maladjusted
Pilot
jet, or
air
passage clogged
Air
cleaner
clogged,
poorly sealed, or
missing
Air
cleaner
duct poorly
seated
Fuel
level
too high
or
too
low
Fuel
tank air
vent
obstructed
Carburetor
holders
loose
Compression low
Spark plug
loose
Cylinder
head
not sufficiently
tightened
down
No valve
clearance
Cylinder, piston worn
Piston rings bad
(worn,
weak, broken
or
sticking)
Piston
rin
g/
land
clearance excessive
Cylinder
head
gas
ke
t damaged
Cylinder head warped
Valve
sticking
Valve
not
closing
Valve
spr
ing
broken or weak
Valve
not
seati
ng
properly (valve bent, warped, or
worn)
Other
Ignition
timing maladjtJsted
Timing not
advanci
ng
(spr
ing
broken
or stretched)
Carburetors
not
synchronizi
ng
Engine oil viscosity too high
Brakes
dragging
Poor
Running
or No Power at High Speed
Firing incorrect
Battery voltage
low
Spark plug dirty, damaged, or maladjusted
Spark plug cap or
spark
plug
lead trouble
Spark plug
cap
shorted or
not
in good contact
Spark plug
incorrect
Contact breaker
points
dirty or
damaged
Contact breaker point gap maladjusted
Capacitor damaged
Ignition
coil damaged
Ill
Ignition timing maladjusted and/or timing
not
ad-
vancing
Contact breaker
spring
weak

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   Also See for Kawasaki Z250 1981

This manual is also suitable for:

Kz350 1981

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