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    Unable to reach max RPMs under load

    Hello I have replace the block of my 2003 350 MAG MPI engine with a new 2010 5.7 GM block. I now have a new problem, it will only go up to 4400RPMs in gear. it will go max RPMs in neutral. I have used my old intake, injectors, assessories, sensors and exaust, any ideas as to why thisis...
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    2003 Mercuiser 350 MAG MPI noise

    Hello A few days ago my engine started making noise when it started; this noise has decreased a little now however when I took the boat out and was in gear will not go over 3000 rpm and the engine will vibrate a lot. Since last time I had a mechanic look at the boat and he told me that may be a...
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    2003 Mercuiser 350 MAG MPI

    Hello A few days ago my engine started making noise when it started, this noise has decreased a little now however when I took the boat out and was in gear will not go over 3000 rpm and the engine will vibrate a lot. Any idea what the problem is?
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