(1) Check the fuel system
1. Too much gasoline is entering the engine's combustion chamber (stop for a few minutes and try to restart or remove the spark plug and wipe it clean).
2. There is not enough fuel in the fuel tank, (add fuel to the tank)
3. The fuel filter is clogged (clean the filter)
p>4. The carburetor is clogged, (clean the oil purifier)
5. The air filter is dirty, (replace the thickener pump, thickener pump tube and filter element)
6. The oil pipe is bent and there is no oil (adjust the length and direction))
7. Wrong type of fuel or water in fuel (replace with new fuel)
(2) Ignition system
1. Spark plug failure (clean carbon deposits on spark plug and adjust spark plug gap)
2. Bad ignition timing (adjust the gap between the valve and the ignition coil too large or too small)
3. Flameout switch failure (replace switch)
p>4. The magnetic force is not sufficient (replace the flywheel)
5. Igniter fails (replace igniter)
6. The engine oil is not refilled or the oil quantity is insufficient, triggering the engine oil alarm system. (added if necessary)
7. Extinguishing wire grounding (adjustment)
(3) Mechanical failure:
1. exhaust valves)
2. Cylinder seal is damaged (replace cylinder)
3. The valve seal is not good (repair or replace the valve)
4. The cylinder, piston and piston ring are worn (replace the cylinder, piston and piston ring )
5. The semi-circular flywheel key is cut and the ignition time is abnormal (replace the crankshaft and the volant). )