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  1. 3

    Bravo 3 Propshaft Seal

    And also… what do I replace it with?
  2. 3

    502 flow issues please help

    That’s why it sounds like a collapsing hose to me.
  3. 3

    Bravo 3 Propshaft Seal

    Where does that line run to? And can it leak outside the transom? I see the reservoir, and I can follow the line back a bit, but I can’t see where it reaches the drive/transom.
  4. 3

    2001 350 mag ski mpi Gen rough idle running rich

    If you have an efi engine running rich, it's generally the ECT sensor (engine coolant temp), it could be the MAP or faulty injectors, but those are the three electrical culprits. Mechanically, it could be bad/low octane gas, bad fuel pump/regulator pushing fuel through the injector, water in...
  5. 3

    2001 350 mag ski mpi Gen rough idle running rich

    TP sensor will not make an engine run rich. The general tell tale of a bad TPS is a flat spot in acceleration. Pretty easy to check with a diagnostic computer as well.
  6. 3

    502 flow issues please help

    If you want to test the output of your pump, the pump should be able to fill a 5 gallon bucket in around 20-25 seconds at 1500 rpm. If you have two people on the boat, you can remove the output hose and run the boat briefly for 30 seconds to perform the test. If possible, try to use a garden...
  7. 3

    502 flow issues please help

    If the hoses are soft or weak, they can collapse. I’ve seen the long, bendy manifold hoses collapse completely when they’re old and worn out. Due to thermal expansion, the stat opening and closing, and different sized openings at each end of the hoses, there can be odd pressure/suction cycles...
  8. 3

    Delco EST

    Get a new mechanic. You cannot time those EST distributors at idle. Search the GM timing procedure for the EST distributor, it’s generally done around 1200-1500 rpm.
  9. 3

    Looking for ECM 2000-01 5 l Mercruiser

    Responded to your other thread, I have one if you need it. Mine is off of a 350 EFI, I have the MEFI burn software if you need another program uploaded to it.
  10. 3

    502 flow issues please help

    Do you have a worn out hose that is collapsing under pressure/suction?
  11. 3

    HELP-- Need an ECM 861925T3 2000 Mercruiser 5l

    I have one if you need one.
  12. 3

    502 flow issues please help

    Try backflushing your oil coolers, and seeing if you have any impeller pieces stuck in them. Have you ever pulled your risers to check for corrosion/rust? Freshwater boat?
  13. 3

    Bravo 3 Propshaft Seal

    Pretty sure I have a bad propshaft seal on a B3. Season started great, and didn't lose any fluid level on the reservoir for the first 8+ trips and over 10 hours of boating. Last trip out I noticed that level was down about 1/4", and figured I'd check into it more. After sitting for a week...
  14. 3

    Crusader 454 gas engine

    Could be a 1,000,000 things; best to rule out fuel first, IMO.
  15. 3

    Starboard on my 97 454 Boggs down exactly at 1900 rpm when underway .

    I'm chasing the same damn problem. Runs perfect right up to 1,900, then shits the bed. There is a safety mechanism that I am told limits the fuel pump (some say that it limits the injector impedance) that comes on right at 2k. I believe that's my/our issue, but I'm not sure how to bypass it. I...
  16. 3

    Hoping for a little help on a Crusader 454XL

    1997 should be EFI, my 1996 is TBI.
  17. 3

    Hoping for a little help on a Crusader 454XL

    I'm chasing the same damn problem. Runs perfect right up to 1,900, then shits the bed. There is a safety mechanism that I am told limits the fuel pump (some say that it limits the injector impedance) that comes on right at 2k. I believe that's my/our issue, but I'm not sure how to bypass it...
  18. 3

    Bertram 302 Engine to 347 Stroker (350)

    It would be impossible for anyone but the owner to know current fuel consumption. You could try to buy flowscan meters and install them prior to a lengthy test drive... But for the most part, hull/cruise/prop/carb will have a much bigger affect on fuel economy than the cui of the engine. If...
  19. 3

    MEFI Tuning

    Does anyone on here have any experience with MEFI tuning (MEFI 1/2 if it matters)? Any good location for .bin files, etc.? There are some auto options, but figured I would ask here first.
  20. 3

    Crusader throttle body fuel injection

    I can say for certain that the IAC and TPS is nothing more than a GM TBI sensor. I have installed both, both worked perfectly, and neither has been an issue. The same is true for the coolant temp sensor. The MAP sensor may be a different story, (I have not confirmed that the auto MAP and...
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