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  1. alldodge

    Mercruiser 4.3L lift points

    It's probably gone and needs replacement
  2. alldodge

    2002 5.0 GXI Cooling System Service

    Hose comes from the raw water pump or thermostat housing. Remove and place garden hose i=on the end and flush backwards toward the outdrive
  3. alldodge

    Mercruiser 4.3L lift points

    Any kind of oil is better then no oil
  4. alldodge

    Mercruiser 4.3L lift points

    Are ALL of the spark plugs out of the motor? If they are then the motor is locked up
  5. alldodge

    Ruined Engine

    Welcome Which VP motor is it? Happen to have a serial number? Open or closed cooled? That is a lot of white smoke coming out so first thing I would want to see is the motor and hose routing. The knocking sounds real bad so need to know how hot did it get. Did it run fine after the over heat...
  6. alldodge

    Fuel delivery

    Don't care, weather it runs on the bench is not the issue, it's if it runs on the motor
  7. alldodge

    Mercruiser 4.3L lift points

    Sure sorry but guess we have a language barrier You cannot crank over the motor?
  8. alldodge

    Ignition switch

    Yes, that is correct way to measure If no power after the connection then measure backwards toward the Bat until you find it again
  9. alldodge

    1992 four winns OMC

    Welcome We cannot see what your seeing so we need pics and more explanation Looking at exhaust outlet or just around it is a bit vague
  10. alldodge

    Mercruiser 4.3L lift points

    Yes, remove all plugs Get some oil into each cylinder and crank it some. Put some more oil in and crank it some more Now figure out where the water came in from
  11. alldodge

    Fuel delivery

    I think this is most simple Have someone turn the key ON and you have your hand on the cool fuel pump under the port side motor mount. Does it turn ON for a couple seconds If YES - attach fuel pressure gauge to furl rail and key ON again and see if pressure gets to 43 psi If NO - Check fuse...
  12. alldodge

    Fuel delivery

    You can check at the pump, which is good enough. Most like the relay because it's easier to get to. If pump does not turn on then need to check at relay Use block or bat ground
  13. alldodge

    350Magmpi

    Suggest give it a rest
  14. alldodge

    350Magmpi

    Fuel pressure should maintain 43 psi give or take no matter what the manifold vacuum is. Dropping below this is an issue Lets start with a engine serial number so we know what your working on. There are a lot of 350 mag MPI's but many of them have different inputs causing different faults/outputs
  15. alldodge

    Fuel delivery

    It would not help to get the factory manual IMO Need to understand electricity to be able to understand the issues with voltages
  16. alldodge

    Fuel delivery

    Key ON, MPR energizes and sends power thru out ECM and to FP relay ECM powers up, hear beep and then applies ground to pin A-19 for couple seconds which powers on FP If you put meter on pin A-19 or pi 86 of FP relay before key is turned ON you will see 0V. Key ON, 12V to relay coil and "may"...
  17. alldodge

    Fuel delivery

    S/N shows a boost pump with 1st Gen cool fuel, 555 ECM and HSV distributor Fuel pressure should be 43 psi at the rail Relay setup, MPR and FP
  18. alldodge

    Marine Air Issues

    Bummer,it's almost never the simple stuff
  19. alldodge

    496 HO Failure

    Your testing prior tells me its not in the head "compression test" all good. The top end is good so only thing left is bottom end and it making a lot of noise. Running the motor will do nothing but make anything that might be salvageable less likely. The more it runs the more something else...
  20. alldodge

    Fuel delivery

    Fuel pumps are energized by the ECM applying a ground to one side of the relay coil. The other side gets 12V from the Main Power Relay (MPR) Which cool fuel do you have (no serial number listed)?
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