Freeze-proofing 4.3, 195 Sport

Discussion in 'Sport Boats' started by Arminius, Sep 20, 2022.

  1. Arminius

    Arminius Active Member

    864
    Oct 30, 2019
    Seattle
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    Hyperlink references are included to two YouTubes showing removal of five very accessible blue petcocks on a raw water cooled V-6 and five more difficult ones on a 5.0. The videoed 5.0 has a factory access port cut through the engine bulkhead separating under seat storage which might be improvised by an owner.
     
    Last edited: Sep 24, 2022
  2. scoflaw

    scoflaw Well-Known Member

    Aug 10, 2011
    cape cod mass, cape coral fl
    1999 Powerquest legend 260 sx 502 mag
    2005 Baja 242 islander 496
    502 mpi Bravo 1
    496 mag B1
    Are you ever?
     
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  3. Pirate Lady

    Pirate Lady Well-Known Member

    Jun 2, 2020
    Chesapeake, Middle River
    Sundancer 250 ‘91
    7.4 Bravo 1
    You will be like the rest of us. Lying awake on a very cold sub zero February night. Hoping you remembered everything and praying come April the block ain’t cracked.
    No boat owner sleeps well January to April.
     
    Nater Potater likes this.
  4. techmitch

    techmitch Well-Known Member PLATINUM Sponsor

    May 1, 2008
    Chesapeake Bay, Middle River/Frog Mortar Creek MD.
    1999 270 DA
    Twin 4.3s W/Alpa I Gen II's
    That was PFG!
     
  5. WaveDancer01

    WaveDancer01 Member

    63
    Sep 7, 2020
    210 SPX 2021
    4.5L 250hp w/alpha drive
    It drives my wife crazy. I am glued to the thermometer for those months.
     
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  6. GypsmJim

    GypsmJim Well-Known Member

    827
    Aug 8, 2018
    Western New York
    '19 SPX 190 OB, 150 & 5 Mercs
    '17 Whaler 150 Montauk
    '15 Yamaha FXHO
    '60 Mulray Dinghy
    '52 Lyman 15'
    Mercury 150 4-stroke
    68 Outboards representing 11 manufacturers
    I have my own method. and so far after 54 years of boat ownership it never failed.

    Drain the silly blue plugs. Then put them back in and run the engine on muffs with a tank to put 5 gal of the pink stuff in the block. At the end, drain a cup of the block water into a small container.

    The boat is stored indoors, in an unheated space.

    Put the container on the trailer tongue and inspect it when the weather gets bad. So far, the container hasn't frozen yet.

    Two comments - I prefer to fill the block with anti-corrosion chemicals as opposed to leaving it full of air. Second, if any water still remains after the drain, my anti-freeze surely would dilute it.

    Now, I am sure that others will say that my method is wrong, and they simply drain the block and have never had a problem either. My response is that I simply followed Mercury Marine's Owner's Manual. Remember that silly book?

    On a similar topic, all this crap about Sta-Bil and ethanol is simply fake news by the youngins and the manufacturer of the product. My 1952 Evinrude manual, and my 1941 Mercury manual recommended stabilizing the fuel even way back then.
     
    Nater Potater likes this.
  7. WaveDancer01

    WaveDancer01 Member

    63
    Sep 7, 2020
    210 SPX 2021
    4.5L 250hp w/alpha drive
    I have a friend that swears draining the water out is all that needs to be done. I follow your approach. I drain the water and then fill it with the pink stuff. I still watch the weather.
     
  8. Jmunk

    Jmunk New Member

    11
    Apr 18, 2011
    VA
    1998 180BR
    3.0L
    Does anyone remove the drain plug on the front of the intake manifold ?
     
  9. Espos4

    Espos4 Well-Known Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    Just spit out my drink!
     
  10. Espos4

    Espos4 Well-Known Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    If you clear your block and manifold drains (not just remove the plugs and hope it drains) you’ll sleep just fine. Add some antifreeze and you’ll sleep like a baby.
     
  11. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Think it through... if that's all you do, hwo do you know for SURE that both sides of the block and both manifolds fully drained? What if one of the drain hoses is plugged?

    And, I fully agree with the comments about filling backup with AF. "Could" just draining it be OK? Sure. "Could" just draining it cause a problem? Sure.

    Filling with AF is "best practice". $40 of AF once a year is some of the best insurance you can buy.
     
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  12. Arminius

    Arminius Active Member

    864
    Oct 30, 2019
    Seattle
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    The 5.0 2003 Blue knob V-8 does have smaller quick release fittings on block whose drain flow needs to be verified physically for best confidence. However, this 2006 4.3 appears to have a petcock draining the water jacket on each side of the V-6 and a central third (blue) plus 2 more on exhaust manifolds (total of 5). Looks like the 4.3 can be fully drained with more assurance than the 5.0. I started this thread with the simple issue of "freeze-protection," not winterization.
     
    Last edited: Sep 23, 2022
  13. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Please reread my answer (and others) above.

    FYI, all of the answers ARE about freeze-protection.
     
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  14. Arminius

    Arminius Active Member

    864
    Oct 30, 2019
    Seattle
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    All fittings on both engines seem to be about 5/8th" ID except for two block drains on 5.0. I'm trying to pedal this 4.3 and have added "EZ Freeze-proofing" to my ad and don't want to be lying.
     
    Last edited: Sep 23, 2022
  15. Espos4

    Espos4 Well-Known Member

    Jan 1, 2017
    Long Island NY
    2007 240 Sundeck
    350 MAG Bravo 3 W/DTS
    08BDCA97-3B9E-40A2-BAA1-FD00A201544A.jpeg
     
    techmitch likes this.
  16. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    "Easy" is in the eye of the beholder. But facts are facts regarding "freeze proofing" - an individual can make up their own mind as to whether it's easy or not.
     
    Nater Potater likes this.
  17. blaster

    blaster Well-Known Member

    May 23, 2011
    potomac river
    2010 sea ray 205 sport
    F-250 CCLB 6.2 4x4 3.73 rear.
    Mercruiser 4.3 mpi alpha 1.62
    This doesn’t seem to be the only thing you are peddling. By the way, is it a lot of work hauling that 195 from place to place in an effort to sell it?
     
  18. Strecker25

    Strecker25 Well-Known Member

    Nov 20, 2014
    Rochester, NY
    2002 410DA
    Caterpillar 350HP 3126
    I’ve made a habit of testing a couple places on each engine using a refractometer and even noting it in my phone so when I wake up in February On a -10* day I can be confident we won’t have something cracked

    I did it with our 5.7’s and it put me at ease and now with a significantly more valuable engine room on the 410 I really like the confidence the AF got to everything
     
    Nater Potater likes this.
  19. GypsmJim

    GypsmJim Well-Known Member

    827
    Aug 8, 2018
    Western New York
    '19 SPX 190 OB, 150 & 5 Mercs
    '17 Whaler 150 Montauk
    '15 Yamaha FXHO
    '60 Mulray Dinghy
    '52 Lyman 15'
    Mercury 150 4-stroke
    68 Outboards representing 11 manufacturers
    Its almost October, for Gosh's sake. The boat's value is now about the lowest it's ever going to be.

    WD40 the outdrive, vaseline the hull and put it on your front lawn. No amount of money you spend to upgrade or improve it will ever be realized. In your ad, post that the Owner's Manual is included. Let the new guy read the book.

    Its an old boat. In this post-covid climate its not worth to much now anyway.
     
    Nater Potater and blaster like this.
  20. Arminius

    Arminius Active Member

    864
    Oct 30, 2019
    Seattle
    Bowrider 200 Select, 2003
    5.0L MPI, 260 hp w/Alpha 1 Drive
    Last year, Bt Doctor pointed out that the Blue Handle on the 5.0 relied on 2 small block drains that would have to be observed and potentially rodded out to ensure complete drainage. Does the 4.3 also include the 2 small block drains?
    [​IMG]
     

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