quannon 125 Workshop-manual : Page 43

          4. FUEL SYSTEM                                                              QUANNON 125


 TROUBLESHOOTING
 Engine cranks but won't start                 Engine lacks power
 · No fuel in tank                             · Clogged air cleaner
 · No fuel to carburetor                       · Faulty carburetor
 · Cylinder flooded with fuel                  · Faulty ignition system
 · No spark at plug
 · Clogged air cleaner                         Lean mixture
 · Intake air leak                             · Clogged carburetor fuel jets
 · Improper throttle operation                 · Float level too low
                                               · Intake air leak
 Engine idles roughly, stalls or runs poorly   · Faulty charcoal canister
 · Excessively used choke                      · Restricted fuel line
 · Ignition malfunction
 · Faulty carburetor                           Rich mixture
 · Poor quality fuel                           · Float level too low
 · Lean or rich mixture                        · Clogged air jets
 · Clogged air cleaner                         · Clogged air cleaner
 · Incorrect idle speed                        · Restricted A.C.V. tube
 · Faulty charcoal canister                    · Worn throttle needle

 Misfiring during acceleration
 · Faulty ignition system
 · Faulty carburetor
 · Faulty accelerating pump
 · Faulty charcoal canister

 Backfiring at deceleration
 · Float level too low
 · Incorrectly adjusted carburetor
 · Faulty A.C.V.
 · Faulty exhaust muffler
 · Faulty A.I.C.V.




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