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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    " A corroded (rusted through) reservoir can cause raw water to enter the exhaust I believe " _ its actually cut - or machined into the elbow - not rusted through - it looks like raw water actually gets pushed through the elbow - reservoir and out the exhaust from the voltage regulator path...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    Thank you all for the help.. This is what i found 1 - before disassembly - i can see a leak down the side of the exhaust manifold, 2 - better picture of elbow leaking, 3 - lots of discussion of rotting elbow OR cracked elbow -BUT i can clearly see a MACHINES hole for the sea water to exit...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    I'm the king of half ass, do you have a resistor link, or the values of the resistor I would get? And would that resistor go on the voltage line to the coil?, Also is there a link to cheap ass a voltage regulator? Part numbers? The issue is I'm flat ass broke this year :-) and lucky to be in the...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    My elbow that sits on top of the exhaust manifold has antifreeze in it ,,,
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    So my understanding is that the actual exhaust manifold may need to be replaced? So the exhaust manifold can cause clear water to get into the oil? Or a failing elbow will b causing this ?? Or a failing gasket seal, and if so is it the seal between the elbow and the exhaust manifold, or the...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    " This could be leaking at the gasket between the manifold & elbow or via a hole in the elbow to from the water side to the exhaust side " - location of elbow...? I've built motors and I'm not afraid to tackle this type of work, pulling manifolds and such, but just want to understand is there...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    Well that's quite an exercise in critical thinking AND i looked at it closely ,, it is VERY likely that's what happened here ! AWESOME troubleshooting ! ,,, i will put a strategically placed piece of plastic above to guard this from ever happening,, Follow-up - if allowed - Also again its a...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    thanks for the response,,, ,, So the oil has not been changed in 2 years, and it sets in a field, all be it motor covered and carb covered,,,, ( Condensation over 2 years in western PA? ) I just changed the oil and ran it 60 seconds and ill dump that oil also as it looks like it picked up the...
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    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -

    Mercruiser - 3.7 ( 470 ) Alpha1 ( please list the sources of CLEAN water in the oil ) about a cup - Antifreeze not leaking - no green in the water -
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    Mercruiser Alpha 1 - backfired and died out on the water ( Its electrical 100% ) - need basic troubleshooting steps,, how do i check charging system?

    hello,,, deeply appreciate the help,, fell free to peek down the thread as i just answered someone on type of battery and i included how the battery is acting,, - it is a 3.7 , - that was also to say its the original stator - and water cooled voltage regulator, - also cranked rather slow this...
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    Mercruiser Alpha 1 - backfired and died out on the water ( Its electrical 100% ) - need basic troubleshooting steps,, how do i check charging system?

    battery when i pulled it last night when i got ome,, it " acted " so drained it cranked the boat over very slow then clicked, 13vdc last night, then i hooked the charger on and it registered 16 amps charging ,,, wow,, - this morning the charger indicated Full charge,, so i measured voltage and...
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    Mercruiser Alpha 1 - backfired and died out on the water ( Its electrical 100% ) - need basic troubleshooting steps,, how do i check charging system?

    ill charge battery and tomorrow ill run it with a fully charged battery,,, and are there any test points to check that regulator or stater
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    Mercruiser Alpha 1 - backfired and died out on the water ( Its electrical 100% ) - need basic troubleshooting steps,, how do i check charging system?

    Boat sat for a full year - - Charged battery to ( full ) on my charger, checked all fluids and she started fine, let her warm up and we were off - - ran about a full hour at 3500 rpms real strong,, - shut her off for about 20 minutes while we talked and hung out - started fine and strong - ran...
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