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  1. A

    2005 5.7 MAG - No power to dash - Combo switch trips breaker

    Thank you always great if we get a final outcome, Thanks
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    Water inside the engine compartment

    I doubt the water got in the motor
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    2015 6.2

    Get a short section of clear hose, double barbed fittings and hose clamps. On raw water side install clear hose in a couple areas. Then run motor and watch for bubbles, there should be few little
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    Mecruiser 4.3 MPI Carbon Issue

    Seeing it on the water means one or more of the cylinders are running rich. Pull the plugs and see which ones have carbon build up. Once those are identified then it can be determined which injectors are at fault And fuel pressure be 43 psi with vacuum line removed off regulator and no lower...
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    2015 6.2

    Would be good to provide all issues other than some kind of piece mill
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    2015 6.2

    150 is not overheating area, so is the question; Why are you getting an overheat when both are "not" overheating??
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    2015 6.2

    Also are motors open or closed cooling?
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    2015 6.2

    Don't understand the highlighted because you said This is both Port and Starboard motors have the same issue?
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    2015 6.2

    Could use a serial number of one of the motors Have you measured the exhaust temp with a IR temp gun? When was the last time the impellers were changed?
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    4.3L Thunderbolt V Ignition

    Delco EST kit cost around $616 https://michiganmotorz.com/4-3l-delco-voyager-est-marine-electronic-distributor-kit/
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    4.3L Thunderbolt V Ignition

    As Dieter mentioned, I would go with EST No manufacture is required to keep spares after 10 years of last production, just what it is
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    115 mercury 4 stroke efi long beep then dies

    Would have been good to read this in first post, all you said was
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    115 mercury 4 stroke efi long beep then dies

    Glad your running but the neutral safety switch will not cause any kind of a beep
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    2005 5.7 MAG - No power to dash - Combo switch trips breaker

    I feel your pain but there is nothing anyone on the forum can do to find the short for you. The Port motor has a short which pops the breaker on Starboard when connected together, got it. Disconnect the alternator wire (orange) from the ALT and see if same happens. With no helm gauges, measure...
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    No power to fuel pump, fuse or relays

    The Main Power Relay (MPR) item 13 is energized by power on the pink wire coming from the key switch. The key switch sends power on the purple wire to the pink. Look to see that you have 12V on the MPR on the Red wire with key OFF and ON. Then check you have 12V on pink wire when key is ON. You...
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    Introduction and help please! Mercruiser Fault codes?

    My guess is you don't have one of those, mostly used on ski boats, don't worry about the other faults either "except" PSI Low Listen to Rod and go check out the water pressure sensor on the power steering cooler. If water pressure is low or if ECM can not read it, the ECM sets guardian
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    2005 5.7 MAG - No power to dash - Combo switch trips breaker

    You have a short Get a voltmeter and start with the battery, it might be shorted out There is a short somewhere and start checking and disconnecting until you find that the breaker will stay on
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    mercruiser 7.4mpi has sudden loss of rpm-out of ideas

    Your fuel pressure is a tad low but your gauge might be a bit off. Pressure should be 43 at WOT or at idle with vacuum line removed from Reg. Compression numbers are exactly 10% apart. Was this done warm or cold? Check to see if the distributor is advancing
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    115 mercury 4 stroke efi long beep then dies

    Don't know the motor that well but if codes list "low pressure fuel pump" I would look for the sensor that reads the pressure, that could be the problem
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    Volvo 7.4

    You have power to the red/purple wire at the key, but when you turn the key ON all power is gone, correct? What is the voltage reading at the Battery and at the Key? If this is correct start at the Battery and start cleaning the cables at both ends until every thing is shinny metal. Next go to...
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