- 42 -
Table of Engine Troubleshooting
Trouble
Cause
Remedy
Eng
ine
c
a
nn
o
t
be
st
a
rted
o
r
st
a
ll
s
sud
denl
y
No fuel in
carburetor
1
、
No fuel in fuel tank
2
、
Fuel tank valve not
opened
3
、
Fuel tank valve clogged
4
、
Float chamber needle
valve hole clogged
5
、
Main jet orifice clogged
1
、
Refueling
2
、
Open the valve
3
、
Clean fuel tank and
fuel tank valve
4
、
Disassemble and clean
the carburetor
5
、
Disassemble and clean
the carburetor
Ther
e
is
fue
l
in
ca
rbu
ret
o
r
Sparking
normal in
high voltage
cable and no
sparking in
spark plug
1
、
Oil stained spark plug
2
、
Broken
spark
plug
magnetic core or broken
electrode
3
、
Carbon deposit in spark
plug electrode
4
、
Incorrect spark plug gap
1
、
Remove, clean and dry
it
2
、
Replace spark plug
3
、
Clean
out
carbon
deposit
4
、
Adjust the gap.
Normal
sparking to
spark plug,
poor
cylinder
compression
1
、
Leaking cylinder head
gasket
2
、
Loose spark plug
3
、
Seized piston ring
4
、
Excessively worn piston
or broken piston ring
5
、
Serious cylinder wearing
6
、
Leaking intake pipe
7
、
Damaged
crankshaft
sealing
1
、
Tighten
screw
or
replace gasket
2
、
Tighten spark plug
3
、
Clean
off
carbon
deposit in piston ring
and ring groove
4
、
Replace
piston
and
piston ring
5
、
Replace cylinder body
6
、
Tighten
or
replace
rubber ring
7
、
Replace sealing
