83
Malfunction analysis and elimination
(
I
)
Engine malfunction
Malfunction
phenomenon
Malfunction
system
Reason
Solving method
1. pressure in
cylinder is too
low.
①
Cylinder wear out
②
Piston wear out.
③
Leakage on Washer of cylinder.
④
Wearing on Pipe of air valve or
seat of valve is not suitable.
⑤
plug is loose.
⑥
Starting motor is too slow.
⑦
Air circulation is not right.
⑧
Gap of valve is not suitable.
change
change
change
Repair or change
Tighten
Check electric system.
Adjust
Adjust
Start
difficultly or
could not start
2. No ignition
generated from
plug
①
Dirt on spark plug
②
Wet on plug or smudge
③
Ignition coil problem
④
Touch loop got open or short
circuit
⑤
Magneto problem
⑥
ECU problem
Clean or change
Clean, dry or Change
Change
Change
Change
Change