1. Faulty spark plug: Ensure the spark plug gap is set correctly and the plug is not fouled or damaged.
2. Incorrect installation: Double-check that the spark plug wire is properly connected to the spark plug and that the plug is screwed in securely.
3. Electrical issue: Check for loose or damaged electrical connections, especially around the ignition coil, kill switch, and battery.
4. Fuel system issue: Make sure the fuel tank has enough gas and that the fuel line is not blocked. Check for any leaks or damage in the carburetor or fuel lines.
5. Air intake issue: Inspect the air filter for blockages and ensure it is installed correctly. A dirty or clogged air filter can prevent the engine from getting the air it needs to run.
6. Compression issue: Check the compression of the engine to make sure it is within specifications. Low compression could indicate a problem with the piston rings or valves.
7. Starter issue: If the engine is not cranking over, check the starter motor, battery, and ignition switch. Ensure the battery has enough power and the starter solenoid is functioning properly.
