3. TROUBLESHOOTING
14
3. TROUBLESHOOTING
3-1 Troubleshooting
3-1-1 Starting Difficult
TROUBLE CAUSE
REMEDY
Normal c
yli
nder com
pression
Normal spar
k
plug s
park
Someth
in
g w
ron
g w
it
h t
he f
uel s
ystem
.
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.
Normal fuel su
pply system.
No
rmal
hi
gh
–te
nsi
on li
ne
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.
H
igh-te
nsi
on l
ine
no s
park
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