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1992 Yamaha WaveRunner III, engine J650C 70 cuts out?

Engine starts, runs fine until you apply full throttle . . . then, it starts cutting out. Throttle back a bit and it runs smooth. What is the likely problem? And correction, please?

Jimmy in Michigan
October 2012
Carb diaphragm sticking. Get a rebuild kit. no doubt about it.

mitch
June 2015

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