① Remove the high-voltage wire in the center of the distributor cover, insert the screwdriver into the head of the high-voltage wire, hold the wooden handle or rubber handle, use the metal shaft of the screwdriver to approach the iron protruding part of the engine, and then start the motor to see if there are sparks flashing. When starting the motor, if it is found that the spark strikes strongly, at least the distributor can prove that the high voltage circuit of the ignition system is good.

(2) If the spark is strong but the engine can't start, it will be attributed to the problem of the spark plug or the wrong ignition timing. At this time, you can remove the spark plugs of each cylinder in turn and check them in turn.

(3) if there is no fire, or dark red star flashing, replace the spark plug or clean it to solve the problem.

(4) If you have a multimeter, you can clamp both ends of the high-voltage cable and measure the resistance. If it exceeds 2.5×104Ω, the cable must be replaced.

⑤ If there is no problem in the high-voltage line test, then the problem of no spark jumping out lies in the distributor head and the distributor cover, so check whether these two parts have stains, cracks and air leakage. If so, please repair or update it.