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10-1-3
IGNITION SYSTEM
Check the followings for lack
of
sparks.
(1)
Wires
of
the ignition coil, spark plug
or
contact breaker disconnected.
B
(2)
Ignition coil damaged and shorted.
(3)
Spark plug cable wet or soaked with oil.
(4)
Spark plug dirty or wet.
(5)
Spark plug electrode gap incorrect.
(6)
Spark plug electrodes are connected or bridged.
(7)
Incorrect spark timing.
10-2
ENGINGE MISFIRES
Incorrect spark plug electrodge gap. Adjust it to anywhere between
0.6
and
0.7mm.
Ignition cable worn and leaking.
Sparks weak.
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Ignition wire connections loose.
(5)
Water in gasoline.
(6)
Insufficient compression.
10-3
ENGINE
STOPS
(1)
Fuel tank empty. Water, dirt, gum, etc. in gasoline.
(2)
Vapor lock,
i.
e., gasoline evaporating in the fuel lines due to overheat around the engine.
(3)
Vapor lock
in
the fuel lines
or
carburetor due to the use of too volatile winter gas in the hot season.
(4)
Air
vent hole
in
the fuel tank cap plugged.
(5)
Bearing parts seized due to lack
of
oil.
0
(6)
Magneto or ignition coil faulty.
,
104
ENGINE OVERHEATS
(1)
Crankcase oil level low. Add oil immediately.
(2)
Spark timing incorrect.
(3)
Low grade gasoline is used, or engine is overloaded.
(4)
Cooling air circulation restricted.
’
(5)
Cooling air path misdirected causes loss
of
cooling efficiency.
(6)
Cylinder head cooling fins clogged up with dirt.
(7)
Engine operated in an enclosed space without sufficient cooling air
(8) Exhaust gas discharge restricted,-or carbon deposits in the combustion chamber.
(9)
Engine running on low-octane gaoline detonates due
to
heavy load at low speed.
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