1998-2001 Honda Fourtrax Foreman TRX450S, TRX450ES Factory Service Manual, Page 92Get this manual
FUEL SYSTEM
TROUBLESHOOTING
Engine cranks but won't start
No fuel tOo carburetor Engine flooded with fue No spark at plug (ignition system faulty) Clogged air cleaner Inta ke ai Jeak Improper choke operati1 on Inp roper th rottle operation
Afterfiring
Ignition system malfunction Carburetor alfunction Lean mixture Rich ixture
Engine idles roughly, runs poorly staili s
Improper choke operaticn Ignition malfunction Fuel co ntam inated Intake air leak lncorrect idle speed Incorrect pilot screw adjustmen Sta rtin enrichment valve stuck open Damaged starting enrichment (SE) valve seat Low cy linder compression Rich mixture Lean mixture Clogged car buretor
Lean mtxture Clogged fuel jets Faulty loat alve Float level too low Blocked fuel fill cap ai vent hole Clogg ed fuel strainer screen Restri cted fu el line Clog ged ai venttube Intake air leak