ENGINE
SYMPTOM
Engine
Misfiring.
FAULT
LOCATION
(CONTINUED)
CAUSE
4.
Incorrect ignition settings.
5.
Incorrect tappet clearance.
6.
Poor compression.
1.
Faulty carburation,
2.
Faulty
ignition.
3.
Valve condition.
REMEDY
Check
type
of plug and spark
gap,
distributor
gap, condenser,
sened automatic advance
mech-
anism. Incorrect
timing.
Adjust tapgts.
Check
in 'vidual corn ressions
with
three
spark plugs
k'
tted and
a
compression gauge in the fourth
cylinder, throttle set at tick-over
using
20
S.A.E. oil and operating
the electric starter. Average
reading should be
120
Ibs. per
sq.
in.
Grind
in
valves
if
neces-
sary.
(a)
Incorrect float
level.
throttle valve
.
,
or
air
leak:
in joints and
manifold connections.
d)
Dirty
or clogged
air
filter.
a)
Incorrect
ignition
timing.
)
Defective plugs or leads.
c)
Defective ignition coil or
h
distributor condenser.
Valves sticking
in
their guides.
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