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4. FUEL SYSTEM K-PIPE 125
TROUBLESHOOTING
Engine cranks but won't start Backfiring at deceleration
· No fuel in tank · Float level too low
· No fuel to carburetor · Incorrectly adjusted carburetor
· Cylinder flooded with fuel · Faulty exhaust muffler
· No spark at plug · Clogged carburetor fuel jets
· Faulty fuel pump · Float level too low
· Clogged air cleaner · Intake air leak
· Faulty charcoal canister
Engine lacks power · Restricted fuel line
· Clogged air cleaner
· Faulty carburetor Rich mixture
· Faulty ignition system · Float level too low
Lean mixture · Clogged air jets
· Intake air leak · Clogged air cleaner
· Improper throttle operation
Engine idles roughly, stalls or runs poorly
· Faulty charcoal canister
· Ignition malfunction
· Faulty carburetor
· Poor quality fuel
· Lean or rich mixture
· Clogged air cleaner
· Incorrect idle speed
· Worn throttle needle
Misfiring during acceleration
· Faulty ignition system
· Faulty carburetor
· Faulty accelerating pump
· Faulty charcoal canister
4-3