CARBURETOR/FUEL PUMP
90-826883R2 JUNE 1998 Page 3A-17
Problem: Engine Floods
Possible Cause Corrective Action
Dirt or debris are preventing inlet needle from
seating.
Flush out inlet seat and clean inlet needle.
Worn inlet needle. Replace
Punctured float Replace.
Incorrect float setting Reset float.
Problem: Engine Runs Too Rich
Possible Cause Corrective Action
Fuel level too high. Reset float to correct level.
Carburetor floods. See preceding “Engine Floods.”
Idle nozzle air holes plugged. Blow out with compressed air.
Restricted air flow. Inspect cowl air inlet and carburetor for obstruc-
tions.
Main fuel jet loose. Retighten jet.
Problem: Fuel Blowback Out of Carburetor
Problem: Unable to Reduce Engine RPM to Slow Idle
Possible Cause Corrective Action
Chipped or broken reeds on reed block. Replace reeds.
Problem: Rough Idle
Possible Cause Corrective Action
Excessive preload on reeds. Replace reeds.
Problem: Engine Runs Too Lean
Possible Cause Corrective Action
Carburetor is loose. Air leaks past mixing chamber
cover.
Tighten bolts securely. Tighten cover or replace
gasket.
Fuel level is too low. Reset float level.
Clogged high speed jet. Inspect jet for varnish or debris and clean.
Restricted fuel flow to carburetor. Check fuel lines and filter(s) for restricted flow.
Incorrect high speed jet. Refer to main jet chart and replace with proper jet.
Idle mixture set too lean. Adjust to run richer (turn idle mix screw counter-
clockwise).
Air leakage into fuel system. Inspect fuel line connections, hose clamps, fuel
pump and fuel outlet tube (located in fuel tank) for
loose fittings.
Anti-siphon valve restricting fuel flow. Inspect valve and/or test engine without valve in
fuel system.
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