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Recent content by stumped 54

  1. S

    2011 mercury 90hp 4 stroke EFI throttles down after 3000 rpm

    My boating neighbor let me use his pontoon boat that has a 2011 90hp mercury 4 stroke on it. It starts fine and idles fine. But, when attempting to run over 3000 rpm, it beeps once for about 2 seconds, then loses power down to an idle. If I keep it at 3K or below, it appears to run fine. After...
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