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2013 SS201 I/O alarm sounding when engine gets much over 300RPM
I have a 2013 SS201 I/O with a 4.3L MPI Mercruiser Alpha One Outdrive. Whenever I open the throttle all the way, I get an alarm and the throttle starts pulsing up and down. As long as I keep the RPMs down around 3000 or less with just my wife and I on board, I don't get the alarm. If I have 4 or five people on board, then it doesn't matter and the alarm sounds as soon as I get the boat up on plane. Any help or advice?