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  1. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Engine was made in 2013, but boat was buildt in 2016, when I bought. And yes, the boat is always in the sea and the bilge is always wet.
  2. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    The upper regulator was changed 2 years ago. It’s a Bosch part. I changed it due to a fail like this. Actually the engine was stalling but start at least. The lower regulator was changed in October. Tomorrow I’ll try with the outboard tank and I want to test the fuel system, but I only find 2 hoses.
  3. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    The gauge start at 0 psi and when the fuel pump start, rise to 40 psi, drop to 25-30 the fuel pump stops, and drop very slow. When I started the test, I was looking how fast or low drop the pressure.
  4. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    The oil is up minimum level, and no milky.
  5. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    A new problem. Today I have checked the bilge after two days of rain and the bilge is full of oil. The crackcase is rusted and leaking oil. Do you know the chevy reference ?
  6. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Last year we sent injectors for test and them were perfect and show the same problem. My wife says that is at least the thirth time that this fail happens. I don’t remember because I try to forget this nightmare... I have contacted with a mechanical and tomorrow are going to change the lower...
  7. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    I have changed almost 2 fuel regulators that i remember. In october oficial service changed fuel pump, regulator and cooler. Its not easy to check because is very narrow. Actually i don’t know where is the fuel pump in the Alpha One gen 2.
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    Mercruiser 5.0 MPI 2013. Crank but no start.

  9. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    I have tested fuel pressure and gives me 40 psi when pump starts and low very quickly to 30 psi. Is it normal ?
  10. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Many thanks for your help. Im going to try understand with my poor english. 1. My gauges are analogic. Faria Kronos. They work as usually do. Actually, trim gauge never worked fine. All gauges work except trim level. I also have vesselview Mobile and also works. 2. This afternoon will check...
  11. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Yes, i did without any change. scanning the ecm, i have found something. The trim signal is always in 5v, and i think that the wires are cutted. Could affect to the ckp, cmp, tps o ecm signals?
  12. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    The boat ran perfect before the rain. A few days later don’t start. We cleaned the distribuidor (had some water) and started again. The next day works fine. A day later didnt start. Later changed distribuidor cap, rotor and cmp sensor, but don’t start.
  13. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Sorry, its only 300, no 3000.
  14. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    I don’t have timing light. Tomorrow i’ll check 12v coil and try to check sparks.
  15. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Scanner gives 40 psi fuel pressure. I get more than 3000 Rpm crancking.
  16. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Yes, sounds like a backfire. I replaced both regulators. I don’t think that could be a low compression problem. Only a few data ago (before a heavy rain) run over 38 knots.
  17. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    I forgot that if i try for 8-10 seconds, try to start but erratic.
  18. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Both: i have vesselview Mobile and a scanner. Serial number:2a183053. MOB circuit is closed. The gremlim kill the engine. I said that i have a gremlin in my boat because it had a lot of problems and i don’t have any Merc service.
  19. H

    Mercruiser 5.0 MPI 2013. Crank but no start.

    Hello everyone: I have a gremlin in my engine. Its a Mercruiser 5.0 MPI Alpha. Crank but don’t want to start. I have changed coil, cmp and ckp sensors, distribution cap, fuel pump, fuel regulator, starter, and a whole of parts, but don’t start. I tried to start for 5-6 seconds each time and...
  20. H

    Mercruiser cranks but wont start.

    A few years later, i have the dame problem. How did you fix it?
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