10-
1
-
3
lGNlTlON
SYSTEM
Check the followings for lack
of
sparks.
(1) Leads
of
the ignition coil, spark plug or contact breaker disconnected.
0)
(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.
(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)
VaDor 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
ENGONE
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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