1. Low battery. Check the battery voltage; it should be above 12 volts. If the battery is low, charge or replace it.
2. Faulty ignition switch. Check the ignition switch to make sure it is making contact with the battery. If the ignition switch is faulty, replace it.
3. Faulty spark plug. Check the spark plug to make sure it is clean and not fouled. If the spark plug is worn or damaged, replace it.
4. Faulty fuel line. Check the fuel line to make sure it is not kinked or blocked. If the fuel line is damaged, replace it.
5. Faulty carburetor. Check the carburetor to make sure it is clean and free of debris. If the carburetor is dirty, clean or rebuild it.
6. Faulty fuel filter. Check the fuel filter to make sure it is clean and not clogged. If the fuel filter is dirty, replace it.
7. Faulty air filter. Check the air filter to make sure it is clean and not clogged. If the air filter is dirty, replace it.
8. Faulty compression release. Check the compression release to make sure it is working properly. If the compression release is faulty, replace it.
