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  1. I

    Converting to carburetor from mpi 350 mag

    There is a knock sensor already in the engine where would that get connected to and which is the easiest to install… let’s say if I get the DUI would that be all I need to get the engine going or do I have to have let’s say another sensor or another module etc… ? Thank you
  2. I

    Converting to carburetor from mpi 350 mag

    I don’t have anything bolted to the exhaust elbow, the only thing on the exhaust elbow was the ECM and 2 relays and all came off… but excuse my ignorance I’m not all that knowledgeable with electronics what I don’t understand is the power starts with the coil then it moves to the...
  3. I

    Converting to carburetor from mpi 350 mag

    All I have is distributor and old style coil cup, 3 wires coming out of the distributor white/red white/green and black those are actually coming out of the a sensor that is seated inside the distributor
  4. I

    Converting to carburetor from mpi 350 mag

    serial number L365398 I converted to carburetor from mpi after my computer got toasted with a lightning.
  5. I

    Converting to carburetor from mpi 350 mag

    So what is the white/green?
  6. I

    Converting to carburetor from mpi 350 mag

    Just as a reminder, ECM is out harness is out intake been replaced with a carbureted intake and a quick fuel technology carburetor the only thing that left is the knock sensor using the same oil and water temp sensors… did I miss something ?
  7. I

    Converting to carburetor from mpi 350 mag

    Ok after so long I am not sure what is going on… I am not getting spark out of the coil. When I turn the switch on all gages comes on except the water temp because it is not connected yet… I have a power line to the coil positive and then it Continue to the fuel pump, the fuel pump comes on...
  8. I

    Converting to carburetor from mpi 350 mag

    I got one from JEG I was told I don’t need new pump or do anything except to install this low pressure regulator
  9. I

    Converting to carburetor from mpi 350 mag

    Using a low pressure regulator after fuel pump. Any thoughts?.
  10. I

    Converting to carburetor from mpi 350 mag

    Thanks for the site I will definitely be using it.
  11. I

    Converting to carburetor from mpi 350 mag

    I tried to stay ECM but it was tough to find the same or even upgrade to mefi4 and it is very costly but even if I did I may find out that I have to change yet the sensors and then pay some to use their gadget to tune in everything, thus I went with the carburetor however now I still got to...
  12. I

    Converting to carburetor from mpi 350 mag

    There had to be some failure somewheres or who knows it might’ve hit the boat directly.
  13. I

    Converting to carburetor from mpi 350 mag

    Ignition is independent.
  14. I

    Converting to carburetor from mpi 350 mag

    Boat was on rack hooked to a land power.
  15. I

    Converting to carburetor from mpi 350 mag

    Yes I did
  16. I

    Converting to carburetor from mpi 350 mag

    Another challenging question to me anyhow: What would I do for harness, distributor and coil pack cup style didn’t have to change, fuel electric pump stays except installing a low pressure regulator … but a harnes I still have to connect starter distributor coil pack oil pressure and temperature...
  17. I

    Converting to carburetor from mpi 350 mag

    I ordered the Holley 650 4 bbl They suggested up to 15 hp more Thanks
  18. I

    Converting to carburetor from mpi 350 mag

    Moved to Florida recently from CT so I’m good now thanks
  19. I

    Converting to carburetor from mpi 350 mag

    At this point I’m not sure if I’m doing it or a mechanic, depends on how complicated it is. My mistake I meant to say 60hp out of both engines or up to 30hp per engine but after asking around I find your info fellows to be more accurate so I stepped down to 650cfm . Thank you i wound up going...
  20. I

    Converting to carburetor from mpi 350 mag

    Ok guys after going back and forth and talking to few pros. Even one who is in the ECM business it seemed the most agree that to this … if you’re having problem with your ECM, EFI etc it is cheaper to go with the carb, the gain is far less headaches far easier and cheaper to fix and potential...
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