Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 176Get this manual
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CARBURETOR
Carburetor inspection 1 Inspect: Carburetor body Cracksdamage ReplaceContamination Clean2 Inspect: Main jet Pilot jet Main nozzle Contamination Clean3 Inspect: Needle valve Pilot scre