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Winterizing with 4.3 Merc

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  • Winterizing with 4.3 Merc

    So it is almost cold enough here to worry about winterizing. I have already unscrewed the blue plugs in the manifolds to drain the water out. I was wondering if this was good enough or should I run some pink stuff through the motor as well.

  • #2
    Originally posted by Tommyd13 View Post
    So it is almost cold enough here to worry about winterizing. I have already unscrewed the blue plugs in the manifolds to drain the water out. I was wondering if this was good enough or should I run some pink stuff through the motor as well.
    If that is all you did then

    Would be good to know what 4.3, maybe a year

    Need to drain the block,
    lower circulating water pump hose
    remove and lower hose come from the Alpha drive and lower to bilge to drain water out

    Check the outdrive drain holes
    Click image for larger version

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    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 Seadoo GTX
    Merc Adults Only VP Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

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    • #3
      Motor and outdrive must also be empty. Like AD said, everything according to the book. If the motor, manifolds, water pump, oil cooler and outdrive are dry, no need to antifreeze. To do the outdrive, lower it down as far as it will go on the trailer and probe the drain holes on the lower part to make sure they aren't plugged up. Water in the outdrive will freeze and split the drive case.
      17 Foot '90 Bluewater
      Alpha 1 3.0 Merc - repowered in 2016
      now - 4.3L Vortec - Alpha 1 GenII
      Honda BF100L kicker
      Engine custom - Transom 0D65328 - Drive 0D648864
      If you ain't fishin, then yer working too much.

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      • #4
        The engine is 2005 Alpha One Drive

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        • #5
          Also there is a square plug on the forward end of the intake manifold that needs to be drained as well.
          1988 Four Winns 200 Horizon
          4.3 OMC Cobra

          98 Jeep Grand Cherokee 4.0 Selectrac
          07 Jeep Grand Cherokee Limited 5.7 Quadradrive II

          "While air doesn't freeze....rust never sleeps"

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          • #6
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            Originally posted by Tommyd13 View Post
            The engine is 2005 Alpha One Drive
            Being a 2005 and your first post I'm thinking you have the 7 point drain and not the 3 point

            It brings up more questions like its probably MPI, and which a serial number would help

            You may have a blue plug on the circulating water pump hose, and if so no need to remove hose, just remove plug.
            If MPI it would also have a blue plug just infront of the cool fuel on lower port side hose

            https://www.mercruiserparts.com/bam/...31499/7801/190
            94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
            95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
            07 Seadoo GTX
            Merc Adults Only VP Adults Only
            G-Dad always said "First Liar doesn't stand a chance"

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