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  1. alldodge

    Engines crank but no start

    When key is turned ON power feeds the purple wire to the main power relay. Should be 12V there, a ground and the relay will supply power to the pink/white There is full time 12V on the fuel pump relay and when the Main relay turns ON and powers up the ECM, it will apply a ground to J1-23 to...
  2. alldodge

    Starting problem...fuel pump?

    If pump is sucking from inside the module and not the line it will just circulate the same fuel. All seals need to be in good shape
  3. alldodge

    Easy way to test fuel pressure? (3.0L / 120)

    The one one in your link is normally used for fuel injected motors, but may also work with a carb. The carb one is 91-18078 this way you can used the low pressure vacuum fuel pressure gauge Either this or make one from barbed Tee fitting and gas hose Do check your antisiphon valve at the tank
  4. alldodge

    3.0GPL-E high idle and other issues

    I'm seeing a PCV valve going to the base of carb or intake. This would be the place to connect the vacuum gauge. Also before connecting the gauge, pull the valve from the cover and place finger over the valve to see if it idles down If this does not help then try to move the distributor
  5. alldodge

    bravo coupler wobble after new engine install

    Coupler is out of round or the coupler didn't follow procedures to install. Need to check run out on coupler so motor has to come out. Here is the service bulletin on the install
  6. alldodge

    Brand new spark plug exploded and left me stranded. (AC MR43T)

    Manufacturers defects happen all the time, but I'm not sure that is what this is I would pull the other plugs to verify, but the plug looks like it was getting real hot, maybe lean
  7. alldodge

    Chrysler 130

    Managed to get all parts separated. Took a lot of heat and a 20 ton press. Even with the heat still snapped some bolts, so drill and tap later Going to take apart the 105 to use some parts from it. Either will need to raise the transom, use a jack plate or figure how to modify and make...
  8. alldodge

    2014 350 mag 5.7l mercruiser

    Sounds like a bad connection or bad relay Measure power at the relay and find out if pin 86 (green wire) goes to ground when key is turned ON. After pump turns OFF there should be 12V on the pin
  9. alldodge

    No Fuel Pressure

    You have relays 3 relays on top the motor next to the ECM. They are: Main Power - MPR Fuel pump - FP Slave (start assist) Next to the relays is also 3 fuses. Find the fuses and check they are not blown. Find the relay with Pink/Green, Green, Pink and Pink/Yellow wires, this is the FP relay...
  10. alldodge

    No Fuel Pressure

    There is a barbed fitting on the tank which the rubber fuel lines connects. This is an antisiphon valve. The valve s a USCG safety requirement but also over time and sitting they can get stuck. Remove it and clean the valve if it can be, otherwise it may need to be replaced Can also get a can...
  11. alldodge

    Engine Alarm - 2000 MerCruiser 5.0 w/Bravo 3 - tried everything to fix

    Could use a serial number to verify but Disconnect the in gear switch
  12. alldodge

    Temporary loss of power

    Its hardly never the coil. The thread in the link you posted was the coil but it was also a MSD coil. Many say MSD stands for Marine Stopped Dead, but if reading the thread he said it was leaking oil from it I would think it could be inside the distributor, the module or the coil...
  13. alldodge

    2003 Volvo Penta 3.0 GSP max speed 25mph

  14. alldodge

    4.3 motor electrical gremlins

    Howdy First, stop using either, that is hard on the motor. If it won't start on gas, it has a problem Pull the fuel filter and dump the contents into a clear container and let it sit for a bit. It should be clear, with no yellow and no water in the bottom. Smell the gas, and it should smell...
  15. alldodge

    Overheating issue! Nothing left to replace?

    Don't let it run long enough to get to 240, you can blow the head gasket and warp the head Agree with FT, look to see how much water is moving. Also are the check balls in the thermostat housing? If check balls are not there, it can reduce the amount of water going to the motor
  16. alldodge

    NEED HELP! Wiring question.

    Not from the motor, but there may be something else its used for Things stopped working after the install, so check the fuse on the trim pump. Where did the fish finder get connected at? If you connected to the ignition purple wire then there may be a bad connection which took place when the...
  17. alldodge

    Temporary loss of power

    Main power relay Fuel pump relay They are both next to the ECM and are small square and probably black
  18. alldodge

    Ignition fuse keeps blowing instantly on Bayliner w/ Mercruiser 5.7

    Tx, want o see if you have an electric fuel pump When moving the motor forward to replace coupler the Alternator connections may have been damaged or wire chaffed. One is the purple ignition wire Also look in this location where the chain was connected, along with the 10 pin connector
  19. alldodge

    1990 5.7 mercury with thunder bolt no spark

    Use this to figure out what is not working
  20. alldodge

    2009 350 mag mis at wide open.

    Dealer replaced the distributor and didn't replace the cap, that's a new one for me, they always throw parts like to get more money As above, the caps are known to cause problems. If its replaced and there is no change keep it on board because they fail without warning. Something change...
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