Shibaura TF516MH-AB, Owner'S Manual

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30
5. Troubleshooting
Symptom Cause Remedy
Hard
t
o
s
ta
rt
No sparks are
produced
1.
Ground wire is short-circuited
2.
Ignition plug is broken or
contaminated
3.
Ignition plug gap is improper
4.
Ignition coil is faulty
5.
CDI unit is faulty
6.
Wiring is not connected properly or
is open-circuited
7.
Main switch is faulty
1.
Repair
short-circuited part
2.
Replace
3.
Replace plug or
adjust its gap
4.
Replace
5.
Ditto
6.
Review and adjust
connections
7.
Replace
Compression is
poor
1.
Piston is worn or seized
2.
Piston ring is seized or broken
3.
Oil seal is worn or broken
4.
Lubricating oil falls short
5.
Cylinder head gasket is broken
1.
Replace or correct
2.
Replace
3.
Ditto
4.
Refill properly
5.
Replace
Run
n
in
g
m
a
lfu
n
ct
io
n
Unu
su
al
s
o
u
nd
Mechanical
sound
1.
Flywheel is loose
2.
Skirt is hit by because of worn piston
3.
Internal contact of armature plate
4.
Foreign matter in crankcase
5.
Impeller hits foreign matter or is in
contact with casing
6.
Loosening
1.
Retighten
2.
Replace piston
3.
Reassemble
4.
Eliminate foreign
matter
5.
Eliminate foreign
matter or correctly
reassemble
6.
Retighten
Knock sound
(fuel system
anomaly)
1.
Fuel falls short (main jet clogged, or
wrong diameter part used)
2.
Overload
3.
Speed too low or high
4.
Ignition plug is wrong
1.
Clean or replace
2.
Change nozzle
diameter or use
safety nozzle
3.
Adjust to proper
speed
4.
Replace with right
ignition plug
Uns
m
oo
th
r
o
ta
tio
n
Fuel system
anomaly
(misfire,
hunting)
1.
Carburetor main jet clogged or
maladjusted
2.
Fuel filter clogged
3.
Overflow
4.
Carburetor mounted improperly
1.
Clean or replace
2.
Clean
3.
Check and adjust
carburetor
4.
Correct mounting
surface or replace
carburetor