Not stable in high
and middle speed
① Muzzle blocked
② Main air channel blocked
③ Needle valve blocked
④ Throttle not work well
⑤ Fuel filter blocked
⑥ Height of floater not right
⑦ Starting pin not closed
Clean
Clean
Clean
Adjust
Clean or change
Adjust
Adjust
Spill over or fuel
level fluctuated
① Needle valve worn out or damaged
② Spring on valve broken
③ Floater not work well
④ Dirt or scale in valve
Change
Change
Adjust or change
Clean
Engine coolant
temperature is
lower
Cooling System ① Fault on heat sensor switch on fan
② Cold weather
③ problem on constant temperature
meter
Change
Cover the radiator
Change
Spark weak Ignition System ① Fault on starter
② problem on spark plug
③ Magneto problem
④ Voltage of battery is weak
⑤ Ignition loop problem
⑥ Starting loop problem
Change
Change
Change
Change
Change
Change
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