Yamaha YFM25RY Automobile User Manual


 
CARBURETOR
6-6
EAS26760
CHECKING THE CARBURETOR
1. Check:
Carburetor body
Float chamber
Cracks/damage Replace.
Float chamber body
Contamination Clean.
2. Check:
Fuel passages
Obstruction Clean.
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a. Wash the carburetor in a petroleum-based
solvent. Do not use any caustic carburetor
cleaning solution.
b. Blow out all of the passages and jets with
compressed air.
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3. Check:
•Float1
Float Tang “2”
Damage Replace.
4. Check:
Needle valve seat “1”
Needle valve “2”
Contamination Clean.
Damage/obstruction/wear Replace the
needle valve, needle valve seat and O-
ring as a set.
TIP
Always replace the valve seat, needle valve
and O-ring as a set.
5. Check:
•Piston valve1
Damage/scratches/wear Replace.
Piston valve diaphragm “2”
Cracks/tears Replace.
6. Check:
•Cover1
Diaphragm spring “2”
Cracks/damage Replace.
7. Check:
Coasting enricher diaphragm “1”
Spring “2”
Cracks/damage Replace.