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    Sudden Drop in RPM’s w/ power loss

    I have a 2009 Formula 270 BR w/ 350 Merc Mag engine. Boat starts fine, idles, comes up to plane and runs for 15-20 minutes, but then the RPM’s “bounce” from 3600 to 1000 back to 3600 within 2 seconds. This issue normally repeats itself every 5-10 seconds with boat eventually slowing due to...
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