2000-2005 Yamaha F40B Outboard Service Manual, Page 94Get this manual

2000-2005 Yamaha F40B Outboard Service Manual, Page 94

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1CONTROL SYSTEM

plug lead of cylinder #1

Tachometer VU-08036-A90890-06760

(5) Adjust the engine speed to 900 rmin by turning the throttle stop screwon carburetor