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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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