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Trouble
Shooting
SYMPTOMS
PROBABLE CAUSE
ACTIOtJ TO BE TAKEN
I
Lack of
power
1
Poor compresSion
Incorrect valve clearance
Adjust
valve clearance
Intake valves
leaking
Lap
valve
seats
Sticking
valves
Replace
valve and gu Ides
Valve springs broken
Replace
valve spring
Piston rings broken
Replace
piston rings
Rings
or
cylinders
worn
Overhaul engine
2
Ignition Improperly
set
Incorrect Ignition limIng
Re
set
DefectIve
spark plugs
Clean
re
set
or renew
Contact breakers defective
Clean
or
replace adjust
gap
3
Lack of fuel
Clogged
carburetor Jet
Clean carburetor
Clogged
fuel pipe
Clean fuel
pipe
Dirty
fuel tank
Clean fuel tank
Faulty
fuel
pump
Check fuel
pump
Fuel filter
clogged
Clean
or
replace
element
Overheating
Insufficient coolant
Top
up
radiator
Loo
e
fan belt
Adjust
fan belt
Fan belt
worn or
damaged
Replace
fan belt
Inoperative
thermostat
Replace
thermostat
Defective
water pump
Repair
or
replace
Clogged cooling
system
Clean system
Incorrect Ignition liming
Re
set
timing
Incorrect valve clearance
Adjust
clearance
Incorrect 011 used
Refill With
correct oil
grade
Radiator finS
clogged
Clean readlator finS
ExceSSive oil consumptIon
Oil leaks
F nd 011 leak and
rectify
DefectIve piston rings
Replace
piston rings
Piston
rings
worn
or
sticking
In
Replace
Piston rll1gs
grooves
Piston
or
cylinder
worn
Replace
piston
or
bore
cylinder
Valve
stem
or
gUide
worn
Replace
as
necessary
D fficult starting
Improper
0
1
Change
to proper
VISCOSity
Discharged
or
defective
battery
Charge
or
replace battery
Loose
connections
Clean and
tighten
connections
Defective Ignition system
Adjust
Ignition check
plugs
Burnt valves
Repair
Or
replace
valves
PIstons piston
nngs
or
cylinders badly
Overhaul enqlne
worn
Engine
nOIsy
Crankshaft
beanngs
or
Journals
worn
Replace bearings
and
grind
crankshaft
or
replace
crankshaft
Connecting
rod
bearings
worn
I
Replace bearings
and
gnnd
crankshaft
or
replace
crankshaft
ConnectIng
rod be
l
Stralgten
or
replace
rod
Piston piston nngs and
pinS
damaged
Check and
replace
parts
as
necessary
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