phenomenon | analysis | solution |
weak | spark plug | • spark plug fouled | • clean the fouling |
or | • the gap is too big or too small | • adjust the gap to 0.6~0.7mm |
no spark | • the insulation damaged | • change the spark plug |
| igniter | • igniter damaged, weak magnetic in the flywheel | • change the igniter or flywheel |
| • gap between igniter and flywheel is too big | • adjust the gap to 0.3~0.5mm |
| others | • poor contact between the high voltage wire and the spark plug | • re-connect |
| • engine stop switch failure or short circuit | • change |
spark jumps | correct compression | • too much fuel in cylinder | • clean the spark plu |
• low quality fuel | • change the fuel • clean the filter |
• high resistance in the air filter |
|
correct fuel feed, abnormal compression | • worn piston ring | • chang |
• spark plug loose | • fasten |
• cylinder head leakage, abnormal valve timing | • adjust or change |
carburetor pump fuel or not | • fuel tube damaged,blocked,the diaphragm and the valve damage | • clean or change the carburetor |