Mash Fifty 50 CC, User Manual

Page: 60 / 66

60
Table of Engine Troubleshooting
Trouble Cause Remedy
Eng
in
e
c
an
no
t
be
s
tar
te
d or
sta
lls
sud
d
e
n
ly
No fuel in
carburetor
. No fuel in fuel tank
. Fuel tank valve not opened
. Fuel tank valve clogged
. Float chamber needle valve hole
clogged
. Main jet orifice clogged
. Refueling
. Open the valve
. Clean fuel tank and fuel tank
valve
.Disassemble and clean the
carburetor
. Disassemble and clean the
carburetor
The
re
is
fu
el
in c
ar
bu
re
to
r
Sparking
normal in high
voltage cable
and no
sparking in
spark plug
. Oil stained spark plug
. Broken spark plug magnetic core
or broken electrode
.Carbon deposit in spark plug
electrode
. Incorrect spark plug gap
. Remove, clean and dry it
. Replace spark plug
. Clean out carbon deposit
. Adjust the gap.
Normal
sparking to
spark plug,
poor cylinder
compression
. Leaking cylinder head gasket
. Loose spark plug
. Seized piston ring
. Excessively worn piston or
broken piston ring
. Serious cylinder wearing
. Leaking intake pipe
. Damaged crankshaft sealing
. Tighten screw or replace
gasket
. Tighten spark plug
. Clean off carbon deposit in
piston ring and ring groove
. Replace piston and piston ring
. Replace cylinder body
. Tighten or replace rubber ring
. Replace sealing