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  1. W

    Few questions about engine condition and parts differences. 5.0 mpi

    Ok so I left off with finding my heads were completely wasted. Deformed and Leaking intake valves and both heads cracked. After looking things over I found the water passages on the bottom or outer part of the cylinders as well as the heads were plugged solid with metal debris. I had to clear...
  2. W

    5.0 mpi losing power after warm up

    I figured i should just start over since im down to one problem and noticed more of whats happening with my motor. As stated in my previous post Ive completely removed and cleaned out the fuel tank, changed the cap, rotor, plugs , wires, fuel filter, all injectors, and oil change with...
  3. W

    Engine wont start in the water. Then loses power at full throttle.

    Hopefully someone can point me in a direction here. Ive done searches here and on several other sites but cant find a solution to my problems. First with the details. Ive got a 2003 mercruiser 5.0 Mpi with an alpha one gen2 outdrive. First problem. The engine starts no problem on land but...
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