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    help, new fuel pumps and pressure still below specs 2004 5.7 MPI

    If equipped as such Mercury didn't utilize this system much. Iirc it was used on a 7.4 mpi gen v with a vst and mechanical fuel pump. This is pretty esoteric We don't know OP serial number/setup, guess we can guess Did you ever locate the seal on your monitor bottle cap? Pardon the digression
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    help, new fuel pumps and pressure still below specs 2004 5.7 MPI

    Again, regardless of presently installed regulator the pump should provide above maximum spec pressure when the vacuum reference line is disconnected OP has performed this test and the fuel pump (oem) hopefully installed correctly does not provide spec pressure Not saying you're wrong about...
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    Alpha 1, gen II trim gauge ok out of water but running in the not

    Most likely a faulty sender/wiring issue Have you inspected the external transom assembly area? Is the wiring intact there and at the connections in the bilge/engine harness?
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    help, new fuel pumps and pressure still below specs 2004 5.7 MPI

    OP states fuel pumps and regulator replaced with oem Untethered vacuum reference pump should supply above spec pressure regardless of regulator A fuel pump with no restrictions regarding supply ought to produce viable numbers for testing. OP's does not It's time to investigate fuel supply (to...
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    Pontoon navigation lights wiring.

    Better drawing, but still lacking The ground connected to the switch is most likely for the switch light (probably red) not the actual navigation/anchor lights The nav/anc lights will be grounded to a buss located somewhere on board. Look to the helm and bilge areas first to locate said buss
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    Output voltage

    Perform the proper stator/rectifier tests for static state Replace the battery with a known good one Run the motor and perform stator output test
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    help, new fuel pumps and pressure still below specs 2004 5.7 MPI

    Have you inspected the fuel supply to the fuel pump? A fuel vacuum test will indicate an issue with the fuel line and fuel tank supply.
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    My boat run slowly. 120HP,2.5L,1989

    Based on previous pics/info posted it won't. Maybe 50/50 Did your properly installed new ignition system components get the motor running well?
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    i need parts and dont know where to look

    83 glastron, guessing slant 4 volvo motor It's seized? Yeah, like suggested remove the drive or at least the top gearbox/u joint assembly to verify. Post some pictures of your setup. We like pictures. A picture(s) will help identify the motor and drive. Plus, we'll be able to see your boat and...
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    Thunderbolt nightmare

    The ignition module doesn't dictate the amount of voltage or amperage supplied to the coil. The battery(s) take care of that. Hopefully the battery(s) you have installed are of the correct size, connected prooerly and in good condition, otherwise you're not boating let alone having good spark
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    My motor was running after pulling out of water

    You should be This story isn't finished yet. Your boat is now destroyed. Please deliver your boat to my house with it on the trailer for proper disposal, I will provide all the means for proper environmentally friendly destruction. After you drop the boat and trailer off here your next stop...
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    Close on the formula

    98% sure on the long block Qjet solid Me want long block (unknown rebuild but seeming solid, 880 n such), carb, remote n cables Boat, meh Trailer, meh Come boating with me
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    4.3 mercruiser alpha 1

    What is a pulley wheel?
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    Pontoon navigation lights wiring.

    Cute drawering Is there a diode in place with an 8 pole switch?
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    Thunderbolt nightmare

    What ignition system are you looking at? Pictures help, somewhat
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    4.3 MPI Runs rough after putting in gear

    Yezzer Uh, huh When was the last tune up? When was the last tune up?
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    Carburetor question

    If the power valve doesn't show any signs of wear at the plunger base and it's well is clear, with the spring in place it should open and return closed in hand and in place Have you soaked/spread/cleaned the whole carb disassembled? Removed all old gasket bits and blasted with air? What about...
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    Blue sea circuit breaker help

    The battery switch you posted a link to is meant to be used in conjunction with an acr The acr will sense if the second/house/accessory battery is suffering and the internal relay will engage and provide charging/maintenance to the second battery during engine operation
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    Trying find brand and type for a boat

    Looks like a trojan, a wellcraft and a magnum rolled into one. Guessing 40+ class, early/mid 80's vintage? I don't know european brands too well, only guess is as prior statement The lines are decent, looks like it would handle most waters fairly well. The arch is cool. Would be interested in...
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    Crank Shaft Position sensor seating Indmar/Chevy Vortec 350

    Maybe inspect other 5 volt connections/components that share the circuit with the cps?
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