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  1. M

    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

    Cylinder Compression Test: I performed compression test when engine was cold, will test again hot - once assembled and running again. Expecting increase of 20+ psi when done while engine is hot. I will update when I complete the test. Intake Manifold Drain Plug: I have now seen several posts...
  2. M

    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

  3. M

    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

    Thanks for the info on clearing out the milkshake. IDK, I have winterized boats 20+ times (5 different boats) with no issues until this year. Either the intake got jammed up or I missed something...
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    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

    In short, winterizing procedure: after fogging the motor, I removed the 5 blue-plugs, poked drain holes with wire, poured a few gallons of RV anti-freeze thru the 1.5" water intake hose, poked with wire again.
  5. M

    MerCruiser 4.3L V6 milkshake oil from cracked intake manifold, how to remove milkshake oil?

    I pulled my 2008 Sea Ray 185 Sport with 4.3L V6 MerCruiser our of storage (Colorado), inspected, hooked up hose, started right up, ran to temp, all good with oil pressure, temp, sounded great. Then performed lake test. Let it warm up, then ran at 3000rpm for about a mile or 2... milkshake coming...
  6. M

    4.3 milky oil

    Adding to existing thread with same topic/issues... Preface: I have winterized 25+ boats, never a problem. I pulled my 2008 Sea Ray 185 Sport with 4.3L V6 MerCruiser our of storage (Colorado), inspected, hooked up hose, started right up, ran to temp, all good with oil pressure, temp, sounded...
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    Mercruiser 4.3L TKS Won't start when warm.

    fFollw up. So I replaced the shift interrupt switch and shazam, problem solved. And then, pretty amazing. I pulled away from the dock, got out of no-wake zone, throttle up... we're hootin' and hollarin' that the problem is solved! And not more than 30 seconds into the cruise we go by a boat...
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    Mercruiser 4.3L TKS Won't start when warm.

    Thanks guys! 1. Didn't know about the shift interrupter switch, found the following post (link to post), and it sounds a helluva lot like what I have going on. This is an excerpt from the below-post The ONLY purpose of the shift interrupt system in the Mercruiser Alpha style outdrives is to...
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    Mercruiser 4.3L TKS Won't start when warm.

    2007 Mercruiser 4.3L, 2-barrel carb with TKS fuel enhancement, in a Sea Ray 185 sport. Pulled it out of storage, went through spring checklist, put it on the lake and ran it for a couple of hours. Put it on the lake a second time and... Turns over on 1st key turn, engine purrs like a kitty...
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