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
③ Ignition coil problem
④ Touch loop got open or short
circuit
⑤ Magneto problem
⑥ CDI problem
Clean or change
Clean, dry or Change
Change
Change
Change
Change
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