What are all the reasons why a tricycle engine won't start?

[MacAnthony]

Tricycle engine failure to start may be caused by damaged spark plugs affecting ignition, faulty ignition coils affecting ignition, depleted battery affecting power supply, low starter motor speed affecting cranking, insufficient air intake affecting combustion, excessively low intake air temperature affecting combustion, or fuel supply system malfunctions. More details are as follows: 1. Carbon buildup: The engine's ignition system primarily consists of ignition coils and spark plugs. Spark plugs are wearable components that require regular replacement. If spark plugs are used for extended periods without replacement, the electrode gap may widen, reducing ignition energy. Prolonged use can also lead to carbon deposits on the electrodes, further impairing ignition energy. Therefore, spark plugs need periodic replacement. 2. Ignition coil damage: The ignition coil converts the battery's 12V voltage into tens of thousands of volts, providing sufficient ignition energy for the spark plugs. If the ignition coil is damaged, the spark plugs won't receive adequate ignition energy. When starting the engine, the battery must deliver high current. If the battery is depleted, the engine will fail to start.