10-1-3
IGNlTfON SYSTEM
Check the followings
for
lack of sparks.
(1)
Wires
of
the ignition coil, spark plug
or
contact breaker disconnected.
(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
timin.g.
10-2
ENGINGE MISFIRES
(1)
Incorrect
spark
plug electrodge gap. Adjust
it
to anywhere between
0.7
and 0.8mm.
(2)
Ignition cable worn and leaking.
(3)
Sparks weak.
(4)
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.
(6)
Magneto
or
ignition coil faulty.
10-4
ENGINE OVERHEATS
(I)
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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