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    MerCruiser 7.4 MPI (1998) - Won’t Rev Past 3000 RPM - Looking for Ideas

    I’m hoping someone has run into this before. I have a 1998 MerCruiser 7.4 MPI that runs and idles fine, but it will not rev past about 3000 RPM under load. It feels like it hits a wall and just won’t make any more power. Here’s what I’ve checked so far: Initially had fault codes for: TPS...
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