FUEL SYSTEM V45 TROUBLESHOOTING Engine cranks but won't start Lean mixture 1. No fuel in tank 1. Clogged fuel jets 2. No fuel to carburetor 2. Piston stuck closed 3. Engine flooded with fuel 3. Faulty float valve 4. No spark at plug (ignition system faulty{ 4. Float level low 5. Air cleaner clogged 5. Fuel cap vent blocked 6. Intake air leak 6. Fuel strainer screen clogged 7. Improper choke operation 7. Restricted fuel line 8. Improper throttle operation 8. Air vent tube clogged 9. Intake air leak Hard starting or stalling after starting 10. Restricted or faulty fuel pump (V45 MAGNA) 1. Improper choke operation 2. Ignition malfunction Rich mixture 3. Carburetor faulty 1. Clogged air jets 4. Fuel contaminated 2. Faulty float valve 5. Intake air leak 3. Float level too high 6. Idle speed incorrect 4. Choke stuck clogged 5. Dirty air cleaner Rough idle 1. Ignition system faulty 2. Idle speed incorrect 3. Incorrect carburetor synchronization 4. Carburetor faulty 5. Fuel contaminated Misfiring during acceleration 1. Ignition system faulty Backfiring 1. Ignition system faulty 2. Carburetor faulty Poor performance (driveability) and poor fuel economy 1. Fuel system clogged 2. Ignition system faulty 50 Date of Issue: January, 1982 0 HONDA MOTOR CO., LTD. 4-2