3. TROUBLESHOOTING
20
3. TROUBLESHOOTING
3-1 Troubleshooting
3-1-1 Starting Difficult
TROUBLE
CAUSE
REMEDY
Normal
cyl
inder c
om
pre
ssion
Normal
spa
rk pl
ug s
pa
rk
Something
wrong with
the fuel
system.
Fuel supply
is not
smooth or
no fuel
supply.
There is no enough fuel in fuel
tank and fuel cock is closed.
Fill fuel, open fuel cock.
Air vent in the fuel filler cap is
clogged
Dredge air vent.
Improper or clogged main oil
flow hole.
Readjust or clean, blow to
get through.
Needle valve is not closed
properly or start hole is clogged.
Dismantle needle valve
and repair, clean, blow to
get through.
Float is damaged or sticking.
Repair float
Fuel supply
is normal.
Fuel is too filthy or deteriorated
Replace
There is water in fuel.
Replace
Too much fuel in engine
Drain extra fuel, dry up
spark plug electrodes.
Wrong fuel brand
Select proper fuel brand
corresponding with the
requirements.
N
ormal
fuel s
uppl
y sy
st
em.
Normal high
–tension line
spark.
Spark plug
is in bad
conditions
Too much carbon deposit and
dirt around electrodes.
Clear away.
Electrodes are burn damaged
seriously or insulators damaged.
Replace spark plug.
Improper electrodes gap.
Adjust to proper value.
High-tension
line no spark
Normal
spark plug
High –tension line is damaged.
Replace
Ignition coil is damaged.
Replace
Magneto loses magnetism.
Replace
Abnormal gap between the
ignition coil and flywheel.
Adjust gap