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11-1-3
ELECTRIC
SYSTEM
When there is no spark, the following must be checked.
3)
11-2
Disconnected cable leading to ignition coil, spark plug or contact breaker.
Broken ignition coil winding, causing short circuit.
Wet
or
oil
soaked spark plug cable.
Dirty or wet spark plug.
Incorrect spark plug electrode gap.
Short connection
of
spark plug electrodes.
Pitted
or
fused breaker points.
Sticking breaker arm.
Leaking
or
grounded condenser.
Incorrect ignition timing.
ENGINE
MISSES
Incorrect spark plug electrode gap.
Worn and leaking ignition cable.
Weak spark.
Loose connections in ignition wire.
Pitted
or
worn breaker points.
Gasoline containing water.
7)
Poor
compression.
11-3
ENGINE STOPS
1) Fuel tank empty. Gasoline contaminated with water, dirt or gum.
2) Gasoline vaporized in fuel lines due to excessive heating around engine. (Vapor lock)
3)
Vapor lock in fuel lines
or
carburetor due to the use of too volatile winter gas in the hot season
4)
Air
vent hole in fuel tank cap plugged,
5)
Seizure in rotating
or
sliding pairs in engine due to lack
of
oil.
6)
Ignition troubles.
114
ENGINE OVERHEATS
1) Crankcase
oil
supply low. Replenish immediately.
2)
Incorrect spark timing.
3)
Low
grade gasoline is used.
Engine overloaded.
4)
Restricked cooling air 5rculation.
*
5)
Cooling air partly misdirected causing loss
to
cooling efficiency.
6)
Cylinder head cooling fins blocked with dirt.
7)
Engine operated in closed space without fresh supply
of
cooling air.
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