What are the reasons why a four-stroke gasoline engine fails to start?
1 Answers
Four-stroke gasoline engine fails to start for the following reasons: 1. Compression failure: (1) Incorrect valve clearance; (2) Wear at the contact area between the valve and valve seat; (3) Wear at the cam lobe of the camshaft; (4) Poor sealing or damage of the cylinder gasket; (5) Wear of the piston rings; (6) Incorrect assembly of the camshaft timing point; (7) Malfunctioning decompression valve. 2. Ignition failure: (1) Abnormal phenomena in the ignition system such as weak ignition energy or misfiring; (2) Incorrect ignition timing; (3) Malfunctioning oil alarm device; (4) Short circuit of the ground wire; (5) Short circuit of the kill switch.