What are the reasons for a single-cylinder gasoline engine failing to start?

[GenesisRose]

1. Electrical or electronic failure: This type of failure occurs very suddenly without any warning. Electrical failures include: blown fuse, open circuit in the high-voltage coil, open circuit in the low-voltage circuit, detached central ignition wire, leaking distributor rotor, or damaged spark plug. Electronic failure mainly refers to the malfunction of the central computer control board. 2. Fuel system failure: Symptoms include engine weakness or the accelerator pedal feeling like stepping on cotton. Possible causes include: fuel pump failure, blocked fuel line, clogged fuel filter, carburetor failure, or damaged injector. Sometimes, the fuel tank may be empty without the owner realizing it. If this is the cause, adding a few liters of gasoline can solve the problem. 3. Mechanical failure: Common mechanical failures include: broken timing belt (or chain), cylinder leakage with no pressure, etc. 4. Battery failure: Visually inspect the battery casing. If it appears swollen or deformed, it definitely needs replacement. Besides the battery, other reasons for the starter not working could be a damaged ignition switch, faulty ignition relay, or a defective starter itself. Additionally, check the grounding circuit and fuses.