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    Mercruiser 5.7 Guardian Mode

    I have a 2022 Mercruiser 5.7 300 HP MPI, non-emission repower engine, w/ closed cooling, and Mercury 48 Pin ECM 555. I had an event and I lost my impeller. The engine was at idle and went into Guardian mode. I replaced the impeller, cleared codes with Rinda/Diacom. I still had issues. I...
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