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  1. #31
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    what was so damn cool about it? ...as tina turner would say...two goes in - one comes out...
    Last edited by FUJIMO; 08-19-2019 at 08:20 PM.

  2. #32
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    Quote Originally Posted by FUJIMO View Post
    The T-4 3.4 Litre V-6 was an EFI only powerhead & was on a short 12'' open exhaust midsection & speedmaster gearcase, that was only intended to be used on a tunnel hull. Some had a slightly larger bore for more horsepower. The standard 3.4 EFI powerhead was approximately 340 horsepower, the analog computer could be programmed for a bit more. Big-bore versions even higher.
    I used to work on a pair of T-4's on 25" mids behind a 28' Apache.
    Sold the Skater, missing it everyday

  3. #33
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    This is the ONLY form that the Mercury "T-4" came as. Period. This is the correct nomenclature for this engine only. It was made for tunnel boats. ALL OTHER 3.4 litre Mercury's, either carb or EFI, are NOT called a T-4.
    Last edited by FUJIMO; 08-21-2019 at 07:35 PM.

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  5. #34
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    ...NOT a T-4...

  6. #35
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  7. #36
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    So this is an efi T4. Going to stick a pencil in my ear and scratch my brain.

    Introduced in about '79 , what induction. Later switch to EFI?

    What about the rumours of 3.9L versions?
    Last edited by FMP; 08-27-2019 at 09:50 PM.

  8. #37
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    1975
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    Thanks......oiney eater......the 3.4 off had the biggg starter......aluum f/w...... the f1 had small f/w....and .....2.4 dia.....wheel.......t4.... finger ports.....off s not......Thanks.... Zonker.......

  9. #38
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    HeeHee......runnin dif.......note the bolt pattern......early one had soft .......later had full....see.....

  10. #39
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    I've got this, now all I need is the mota!Click image for larger version. 

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  11. #40
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    Quote Originally Posted by bernie View Post
    I've got this, now all I need is the mota!Click image for larger version. 

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    Bernie, We know where the hull is, now all we need are the three T4's LOL!!!!

    Click image for larger version. 

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  12. #41
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    Someone have crank picture?

  13. #42
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    Note...... different covers.......

  14. #43
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    Quote Originally Posted by RogerH View Post
    Bernie, We know where the hull is, now all we need are the three T4's LOL!!!!

    Click image for larger version. 

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    Probably Norris W. has them!

  15. #44
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    My memories of the Merc T-4

    The Merc T-4 was introduced in Bristol/Embassy GP 1979.
    I traveled to Bristol as a spectator to meet people about my future OZ class racing. Raced the OZ class with one of Renato Molinari's Saffa boats in the last race 1978. (Paris).
    Remember asking Jack Leek about the new Merc in Bristol..is it a V8 or a large V6..??
    Jack was not sure and asked me to try to found out more about the T-4.
    I was standing next to Seebold's boat for a long time watching Team Mercury work on the boat.
    I did see parts of the fuel injection and could count the small clear hoses. Only six, not eight and I did see this a few times.
    (Team Mercury was covering everything up with a tarp)
    Went back to Jack Leek and told him I was 100% sure it was a large V6, not a V8.
    Billy Seebold and Earl Benz dominated the Bristol race 1979.
    I was at many European races 1979 when Mercury raced the T-4.
    Chasewater, Milan and Paris to name a few.
    I can also tell that Roger Jenkins raced a T-4 with Mariner colors. Remember him or maybe Tom Percival complaining that they got the carburetor model..not the fuel injected T-4. Not sure if this was true or not.
    I was also in Bristol 1980 for the last race of the Mercury T-4 in the tunnel boat racing.
    Well..later I guess 1984 the Merc T-4 was back again to try to race the OMC V8.
    I have many stories about that on my own thread here at S&F.
    https://www.screamandfly.com/showthr...29#post3156329

    Click image for larger version. 

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    Last edited by lars strom; 08-28-2019 at 10:23 AM.

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  17. #45
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    Thanks Lars for your post..........Lets Raid....... Rmansss shed..... HeeHee

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