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  1. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    You are 100% correct. I am still trying to get someone to look at the boat.
  2. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I replaced all of them. Temp, MAP and tps.
  3. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I have a TPS and MAPT. What is the ECT and PCM.
  4. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I think I am having a lean fuel issue so my question is this. What tells my motor and computer that I am under a load and need more fuel.
  5. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Well I have someone coming down tomorrow AM to look at the boat. I am going to take some readings on all the sensors to see if they acting up or not. More to follow.
  6. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Still trying to get a good technician to look at my issue. never thought they would be so hard to find. I do have a question though. Has anyone heard of clocking or timing the duo props on the Bravo 3. Both props are 3 blade.
  7. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I am still trying to get someone that has a laptop. Yes I put a lot of money in this motor and still no luck. I should have just bought a brand new crate motor and just put it in.
  8. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Update: I had a mechanic come by over this weekend with a scan tool. Unfortunately it did not show any faults. I am trying to get a mechanic down to the boat with a laptop that can see a lot more detail in what is going on. The computer is not getting the message to give more fuel when it is...
  9. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Ok - I was down at the boat tonight and I was able to get the boat on a plan. My mechanic sprayed ether into the throttle body while i was powering up and I was able to get the boat on a plan running at 4k. We then decided to put the ECM into the default mode to confirm we did not have a...
  10. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I am actually trying to get someone with the right tools to work on this. The 1st guy I had could not figure it out. He was supposed to be top notch. Well that was wrong.
  11. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I have heard that about propane but I have never used it. Nervous. What is weird, when I had the old ECM installed and disconnected the MAP sensor, I was able to get the boat on a plan. If the Knock sensor was preventing it, would that send an alarm?
  12. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Tomorrow I am going to try and spray some starter fluid in the Throttle Body when trying to get on a plan. That should at least tell me if it is starving for fuel.
  13. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    casting # is 10243880
  14. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Update: 7/6. Timing at idle is 10 degrees. rev the engine and timing advances to 24 degrees. Also I have ITR4A 15 spark plugs. I did not have a gap tool but the gap looks big.
  15. W

    Mercrusier 350 MAG MPI - RPM issue under a load

  16. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Just so you know what I did with the timing tool. I got the motor to TDC, then I rotated the motor to 10degrees BTC. Once I had the motor to 10 degrees BTC I used the timing tool to get it set dead on. I will get the other information tomorrow
  17. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Update: I went down to the boat today and made the necessary adjustments to the distributor/HVS per the service bulletin and unfortunately no change. Runs great at the dock but once you try to get on a plan it has no getup and go.
  18. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    Update: I have returned from vacation so I will be going down to the boat tonight to make the final adjustments to the distributor per alldodges service bulletin from Merc. Hopefully the weather cooperates that I can water test it.
  19. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I was not able to get to the boat last night. trying to do it tonight.
  20. W

    Mercrusier 350 MAG MPI - RPM issue under a load

    I will be making the tester tomorrow & testing tomorrow night. i will reply once I have an update. Fingers crossed.
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