Why won't my motorcycle start after refueling when it ran out of gas?
1 Answers
The reason a motorcycle won't start after running out of fuel and being refueled is: either the motorcycle's engine spark plug is damaged or there's air in the carburetor. Running out of fuel generally causes damage to the engine. While cleaning the carburetor and fuel tank, and replacing the spark plug, it's also important to change the engine oil according to maintenance requirements. If the spark plug appears black and charred, it indicates the spark plug has burned out and needs replacement. If no charring is observed, check if the spark plug is dry. If dry, it means no fuel is reaching it; if wet, it's functioning normally. After running out of fuel and refueling, there might be air trapped in the carburetor. During startup, fuel may not properly enter the cylinder, preventing ignition. In this case, locate a screw at the bottom of the carburetor, loosen it a few turns to release the air. Wait until fuel starts to flow out, then attempt to start the engine. The spark plug is a crucial component in a gasoline engine's ignition system. It introduces high voltage into the combustion chamber and creates a spark across the electrode gap to ignite the air-fuel mixture in the cylinder. It mainly consists of a terminal nut, insulator, terminal screw, center electrode, side electrode, and shell, with the side electrode welded to the shell. Spark plug working principle: Under high voltage, the air between the spark plug's center electrode and side electrode rapidly ionizes, forming positively charged ions and negatively charged free electrons. When the voltage between electrodes reaches a certain level, the number of ions and electrons increases like an avalanche, causing the air to lose its insulating properties.
