Engine won't start

No fuel to carburetor

• Fuel strainer clogged
• Fuel tube clogged
• Float valve stuck
• Float level maladjusted
• Fuel tank breather tube (or hole) clogged
• Fuel pump malfunction
• Fuel auto valve malfunction

To much fuel getting to engine

• Air cleaner clogged
• Flooded carburetor

Other

• Intake air leak
• Fuel contaminated
• Slow circuit or starting enrichment valve circuit clogged