Thread: Mercury Mark 40-H

  1. #1461
    BoatRacingFacts VIP Aeroliner's Avatar
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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

  2. #1462
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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
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    Alan is this the same as the KG7? Skip

  4. #1464
    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

  5. #1465
    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.
    " Three may keep a secret if two of them are dead" Ben Franklin

    Location: SW Orlando, Fl

  6. #1466
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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

  7. #1467
    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

  9. #1469
    Jerry Wienandt
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    And what old four cylinders might those be?

    Might want to check your 'Where Used' book...

    I've found nice ones to be scarce. Many are cracked loose at the joint where the tube meets the plate...

  10. #1470
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    I think from my old parts books the Mark 50 and possibly the MK 40

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