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Recent content by BigOtuna

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    Anyone able to post wiring diagram for a 2003 25 hp 4 stroke mercury outboard wires burned at fuel pump

    Hahahah been there brother! Hope that does it
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    Anyone able to post wiring diagram for a 2003 25 hp 4 stroke mercury outboard wires burned at fuel pump

    I can post a link to the manual. Does it have OEM fuel pump? https://www.manualslib.com/manual/2126168/Mercury-25-Efi.html#product-30%20EFI%20FourStroke
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    2010 Mercury EFI 30 Weird Stalling Issue

    Ok fellow nerds, here are the results! No stalling on lake, ran the whole time without dying. Biggest improvement hot: ECM charge coil (a→f) + mid/low coil (e→f) while running → no longer sagging into the 10–10.7 V range, now holding 13.6 V. Electric start b→c hot jumped from 30 V →...
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    2010 Mercury EFI 30 Weird Stalling Issue

    New stator is on! The flywheel did have an abundance of "rubber grime" on inside of it. Just a thin coating im assuming from the timing belt. I cleaned it, and installed new stator, torqued everything down and will lake test tonight! Stay tuned. Hindsight.... I should have just cleaned...
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    2010 Mercury EFI 30 Weird Stalling Issue

    Ohhhhh. You know what. Didnt think about that!!!
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    2016 Mercury 25HP EFI Will not start when hot

    Had this problem and found a solution here. Thread '2010 Mercury EFI 30 Weird Stalling Issue' https://www.marineengine.com/boat-forum/threads/2010-mercury-efi-30-weird-stalling-issue.484576/
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    2010 Mercury EFI 30 Weird Stalling Issue

    I love the theory of operation. Motor will run on its own without a battery connected. But when the ecu is not being charged correctly, problems! Ordering a new stator alternator here soon, in the meantime, I have ecm powered by a separate 12 volts from a battery and it runs fine. 6 hours on...
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    2010 Mercury EFI 30 Weird Stalling Issue

    Here is a more acceptable display for data. Going to trace some wires and see where they all go to double check function.
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    2010 Mercury EFI 30 Weird Stalling Issue

    More DATA for you data nerds! Here is the full stator test and my conclusions. Stator alternator is not performing at hot temps supplying ecu with proper voltage to operate. When ECU is on diagnostic cable, it is powered by direct 12 volts from battery and does not die at idle. My diagnosis...
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    2010 Mercury EFI 30 Weird Stalling Issue

    Yea this is the same setup as mine with the alligator clips. I'm electric start too. I love Diacom its a great system. I haven't had time to tinker with the boat again, but since I have no issues when Diacom cable is on powering ecu, its leads to think: Ecu is not getting correct voltage from...
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    2010 Mercury EFI 30 Weird Stalling Issue

    From the manual. "This electronic control module (ECM) is an alternator driven component. It does not require a 12 volt battery source to function. As the flywheel is rotated by the recoil rope or with the electric starter, the ignition stator generates voltage to energize the ECM, ignition...
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    Mercury tracker 40 hp 2 stroke overheating

    Nice! That will be a pretty simple test. A few nice you tube videos can help you out! Keep me posted :)
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    Mercury tracker 40 hp 2 stroke overheating

    Does it have a poppet valve? Like increase stream with rpm?
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    Mercury tracker 40 hp 2 stroke overheating

    I would test some sensors in various temps of water with a voltmeter to make sure they are reading correctly! Also take a look at your thermostat(s) to make sure they are opening up. Is the water coming out the pee hole hot?
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    2010 Mercury EFI 30 Weird Stalling Issue

    In talking with Rinda and looking at Page 2A-5 in service manual: "The diagnostic cable connection supplies power to the ECM. Disconnecting sensors and actuators while the ECM is powered up in the special service mode, will cause faults to be displayed in the faults status screen. These faults...
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