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PART 1-1
-ENGINE
1-9
ENGINE TROUBLE
DIAGNOSIS GUIDE
(Continued)
IGNITION SYSTEM
Accelerating
pump
stroke
not
POOR ACCELERATION
Incorrect
ignition
timing.
Fouled
or
improperly
adjusted
spark
plugs.
properly
adjusted.
Leaky
power
valve, gaskets,
or ac
celerating pump diaphragm.
Improperly
adjusted
or
defective
Dirt
or
corrosion
in
accelerating
breaker
points.
system.
Distributor
not
advancing prop
Distributor
vacuum
passages
in
erly.
the
carburetor
blocked.
FUEL
SYSTEM
Restricted fuel
filter.
Inoperative accelerating pump in
let ball
check.
BRAKES
Inoperative
accelerating pump dis
charge
ball
check.
Improper
adjustment.
Accelerating
pump diaphragm de
fective.
TRANSMISSION
Float setting
incorrect.
Throttle linkage
not
properly
ad
Improper band
adjustment.
justed.
Converter
One-Way
Clutch.
FUEL
SYSTEM
Improperly
adjusted
or
defective
ENGINE DOES NOT
Restricted
air
cleaner.
breaker
points.
|
DEVELOP FULL
POWER,
Restricted fuel filter.
OR
HAS POOR HIGH
SPEED PERFORMANCE
Clogged
or
undersize
main
jets
and/ or
low
float
setting.
COOLING SYSTEM
Clogged
or
undersize
secondary
jets.
Thermostat inoperative
or
incor
rect
heat
range.
Power
valve clogged
or
damaged.
Secondary
throttle
plates
not
opening.
Check
the
cooling
system
for in
ternal
leakage
and
/or for
a condition
that
prevents
the
engine
from
reach
Fuel pump
pressure
incorrect.
ing
normal
operating
temperature.
Distributor
vacuum
passage
in
the
carburetor
blocked.
EXHAUST
SYSTEM
Restriction
in
system.
IGNITION SYSTEM
Ignition
timing
not
properly
ad
justed.
ENGINE
Defective
coil,
condenser,
or
Perform
an
engine
compression
rotor.
test to
determine
which
mechanical
Distributor
not
advancing prop
component
is
at
fault.
erly.
One
or more
camshaft
lobes
worn
Excessive play in
the
distributor
beyond
wear
limit.
shaft.
Distributor
cam worn.
Fouled
or
improperly
adjusted
TRANSMISSION
spark plugs.
Improper band
adjustment.
CONTINUED ON NEXT PAGE
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