TROUBLESHOOTING
Abnormality of engine
Inside ...………………….…..check
Malfunction of carburetor ….check
Defective H.T. wire…..….….Replace together
with coil
Defective coil………….……..Replace Stop
switch is grounded……Unground Defective
wiring……….…….Correct Defective
magneto…….……Replace
Defective or damaged
Spark plug……………….…...Replace
Incorrect spark plug gap…....Adjust
Adherence of carbon….……Clean with
brush
Too wet spark plug……….…Dry Incorrect
Connection of spark plug…….......Correct
Felt is clogged with dust.......Replace
Air orifice of tank cap is
Clogged.................................Clean
Fuel passage in carburetor
is clogged with dust..............Clean
Leakage from mounting
Surface of carburetor............Retighten Air
Orifice of fuel tank cap
Is clogged.............................Stop
leakage
(packing,
etc.)
Clogged needle valve at
Fuel inlet................................Clean
Transformation of metering
Lever ...................................Correct.
.
Fuel different from specified
one.......................................Replace
Incorrect opening of throttle
Lever and choke lever...........Operate regularly Too
Lean or rich fuel .............Adjust
Fuel overflows into muffler....Clean needle
valve of dust and
start with throttle
lever fully
opened
Tank, felt clogged .................Replace
Fuel pipe clogged .................Clean
Air mixed in fuel pipe ............Drain air
No fuel in tank
Fuel does not
keep running
Defective
acceleration
function
Engine does not start or is difficult start
Fuel
t
ank filled with fuel
Engine cranks
No fuel reaching
carburetor
cylinder
No spark
at
tip
of
S
park
at
tip o
f
secondary coil