9-1-3
ELECTRICAL SYSTEM
Check the following
for
lack
of
sparks.
0
9-3
1)
9-4
Leads of the ignition coil, spark plug
or
contact breaker disconnected.
Ignition coil damaged and shorted.
Spark plug cable wet
or
soaked with oil.
Spark plug dirty
or
wet.
Spark plug electrode gap incorrect.
Spark plug electrodes in contact with each other.
Contact breaker points pitted or fused.
Breaker arm stuck.
Condenser leaking
or
grounded.
Incorrect spark timing.
ENGINE MISFIRES
Incorrect spark plug electrode gap. Adjust it to anywhere between
0.6
and
0.7
mm.
Ignition cable worn and leaking.
Sparks weak.
Ignition wire connections loose.
Pitted or worn breaker points.
Water in gasoline.
Insufficient compression.
ENGINE
STOPS
Fuel tank empty. Water, dirt, gum, etc. in gasoline.
Vapor lock, i. e., gasoline evaporating in the fuel lines due to overheat around the engine.
Vapor lock in the fuel lines
or
carburetor due to the use
of
too volatile winter
gas
in the hot season.
Air
vent hole in the fuel tank cap plugged.
Bearing p.arts seized due to lack
of
oil.
Magneto
or
ignition coil faulty.
ENGINE OVERHEAT
Crankcase
oil
level low. Add
oil
immediately.
Spark timing incorrect.
Low grade gasoline is used,
or
engine
is
overloaded.
Cooling air circulation restricted.
Cooling air party misdirected causes loss of cooling efficiency.
Cylinder head cooling fins clogged
up
with dirt.
Engine operated in an enclosed space without fresh supply of cooling air.
Exhaust gas discharge restricted,
or
carbon deposits in the combustion chamber.
Engine running on low-octane gasoline detonates due to heavy load at low speed.
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