Thread: Mercury Mark 40-H

  1. #1481
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    Here is an excellent thread about the 10XS from over on hydroracer.

    http://hydroracer.net/forums/forum/m...y-10xs-history

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    BoatRacingFacts VIP Aeroliner's Avatar
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    Hi John,
    I was just informed that the 10XS alky issue is really up for grabs. There is a thread on Hydro Racer that was posted to this thread that has statements that the engine was converted to alky.

    Quote Originally Posted by John Schubert T*A*R*T View Post
    Just confirmed with Alan Ishi, a good friend who drove for Doc Collins, that those used by Doc with several different drivers in the then I guess JPRO later KPRO were run exclusively on gas & oil.

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    Default Alky 10XS

    I lifted this from Hydro Racer!


    Re: MERCURY 10XS HISTORY...

    10-08-2016, 08:10 AM


    Correct me if I'm wrong, but I believe Beth was running the 7.5J, not the 10xs. Two different engines. I had my a$$ handed to me by a few of the 7.5J's that were running out here in the middle 80's. I remember Jenny Peterson and Chris Gregg had them and I know Mike Jones had a couple that were run by his boys along with Matt Yarno and I believe Nathan Adams. I finally got a complete powerhead from the Peterson family that I am looking for a tower housing for to add to my collection.
    ​Doc Collins had a FLEET of these 10xs's of which Susan Rautenberg and I had the opportunity to race for Doc a couple of times in about '87 or so. These engines were running on methanol. My dad indirectly ended up buying these engines that Doc had and I still have two, a really clean Gasser and a Fueler that is currently "Caster Locked". I do remember there were several in Region 11 and I believe Sheryl (Rautenberg) Rucker had one up here in Region 10.
    ​ For about 20 minutes in the early 2000's the SORC allowed the Merc 15 to run in A Stock with any Mercury combination that would "Bolt together without modification" on a probationary basis. So my dad took a (Now current) Merc 15 powerhead and put it on the 10xs (Short) tower. It was a GREAT handling setup on my 10' (ROLL-UP!) Austin. However the combination wasn't terribly competitive with the short amount of work and testing we did.
    ​ Looking back, I feel we may have missed a great opportunity that Mercury had offered at the time. But each commission did was they thought was right at the time. Nobody that I know has a Delorean to go back and forth in time to know for sure.

    ​J-Dub

  4. #1484
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    Default Mercury 55-H/30-H Co-pilot disk

    I will be building a few engines over the winter and need 6 P/N 21906 co-pilot disks. If anyone has some to sell drop me a line.

    Thanks
    Alan
    Attached Images Attached Images  

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    Alan is this the same as the KG7? Skip

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    BoatRacingFacts VIP John Schubert T*A*R*T's Avatar
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    Quote Originally Posted by Skip Baker View Post
    Alan is this the same as the KG7? Skip
    yup

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    Team Member zul8tr's Avatar
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    Quote Originally Posted by Aeroliner View Post
    I will be building a few engines over the winter and need 6 P/N 21906 co-pilot disks. If anyone has some to sell drop me a line.

    Thanks
    Alan
    At a recent AOMCI meet in Winter Haven I was looking over Frank Erions trays of stuff for recoil pawls and came across a tray full of the co pilot disks.
    “Extraordinary claims require extraordinary evidence” Carl Sagan

    Location: SW Orlando, Fl

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    Quote Originally Posted by Skip Baker View Post
    Alan is this the same as the KG7? Skip
    NO, they look the same but the HG-7 is much smaller. The part I need is 21960 while the KG-7/20-H is 20951.
    Thanks for asking,
    Alan

  9. #1489
    Jerry Wienandt
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    As used on the 55H, 30H and 402X...

    What is the going price?

    Jerry

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    Hi Jerry,
    I have not seen any on ebay or for sale. My guess is there worth about $20 in that you can also find them in old junk 4 cylinders before the MK58.

    Alan

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