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    Crazy Tachometer

    I have a 2008 Sedona FS21 pontoon boat with a tach that at times seems to be operating correctly, other times it seems to be doubling the RPMS. I know my 1999 Merc 90hp 2-cycle does not accelerate to 7,000 RPMs just off idle nor will it cruise at 6,000 rpms at while doing 14mph. Any ideas how...
  2. S

    Mercury 90hp Throttle Rollback

    I have a 2008 Sedona FE21 pontoon boat with a Merc 90hp 2-stroke that works well but the throttle will not stay at the RPMs (4,500) that I want. the throttle starts to rollback to about 2,900 so I have to hold the throttle in place. The throttle in a Merc 883711A12 top mount and I can not find...
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