1986-1987 Honda TRX350 FourTrax 4X4, 1987-1989 TRX350D Foreman 4X4 Service Manual, Page 39Get this manual
FUEL SYSTEM
TROUBLESHOOTI NG
Engine cranks but won't start No fuel in tank No fuel to carburetor Too much fuel getting to cylinder No spark at plug (ignition malfunction) Air cleaner clogged Engine idles roughly, stalls, or runs poorly Idle speed incorrect Ignition malfunction Rich mixture Lean mixture Air cleaner dirty Insulator leaks Lean mixture Carburetor fuel jet clogged Fuel filler cap vent hole blocked Fuel filter clogged Fuel line kinked or restricted Float valve faulty Float level too low Intake air leak Rich mixture Starter valve stuck open or damage Float valve faulty Float level too high Carburetor air jet clogged Air cleaner dirty