Checking The Carburetor - Yamaha EK25BMH Service Manual

FUEL
25B-4-19
CARBURETOR

CHECKING THE CARBURETOR

CAUTION:
Do not use steel-wire to clean the jets. This
may enlarge the jet diameters and seriously
affect performance.
Check:
• Carburetor body
Cracks/damage → Replace.
Contamination → Clean.
• Needle valve
Grooved wear → Replace.
• Pilot screw
Bent/wear → Replace.
• Main jet
Contamination → Clean.
• Pilot jet
Contamination → Clean.
• Main nozzle
Contamination → Clean.
• Float
Cracks/damage → Replace.
• Pump plunger
Cracks/damage → Replace.
• Fuel passage
Clog → Clean.
• Air passage
Clog → Clean.
NOTE:
Use a suitable cleaning solvent and blow
out clogged passages with compressed air.
WARNING
Protect your eyes with suitable safety spec-
tacles or safety goggles when using com-
pressed air.
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