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    Limited max rpm 2005 225 hp 4 stroke

    :confused: I have twin Yamaha 225 4 strokes, 2004? model, new in 2005, 150 hours. One engine does 5500 RPM, and the other max's out at 5000 RPM. I have changed the plugs, run power tune thru the engine, added chevron fuel injector cleaner to the fuel, checked the butterfly valves for full...
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