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  1. #1
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    V-8 lower formula race lower?

    What is it looks like vV-8 factory low water pick up lower has cr. Stamped in sideClick image for larger version. 

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  3. #2
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    sent you a pm.
    Shawn B.

  4. #3
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    Housing looks exactly like my Second Effort V6 case.

    Matt

  5. #4
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    Yeah thanks want sure till someone told me

  6. #5
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    That gearcase would most likely only work on a 1985-1987 3.6 counter rotation engine because the counter rotation powerhead actually spun counterclockwise. I had a CR and SR case. Those cases were slow but bulletproof.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Triad V21 #002 - 15in DBR 300 xs
    19' J-Craft - 175 Opti
    18' Pontoon - 115 CT 4S

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  8. #6
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    Thanks. For IMF

  9. #7
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    Quote Originally Posted by V-bottom View Post
    That gearcase would most likely only work on a 1985-1987 3.6 counter rotation engine because the counter rotation powerhead actually spun counterclockwise. I had a CR and SR case. Those cases were slow but bulletproof.
    Very nice, what were they on?
    They are also a different shape than the first one posted?

  10. #8
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    Quote Originally Posted by powerabout View Post
    Very nice, what were they on?
    They are also a different shape than the first one posted?
    Previous boat. Had it from '1992 - 2011
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Triad V21 #002 - 15in DBR 300 xs
    19' J-Craft - 175 Opti
    18' Pontoon - 115 CT 4S

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  12. #9
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    Quote Originally Posted by V-bottom View Post
    Previous boat. Had it from '1992 - 2011
    I loved that boat.
    Aluminum deck.

    i remember it coming up for sale and wishing my timing was better.
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

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  14. #10
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    Gear case

    Quote Originally Posted by V-bottom View Post
    That gearcase would most likely only work on a 1985-1987 3.6 counter rotation engine because the counter rotation powerhead actually spun counterclockwise. I had a CR and SR case. Those cases were slow but bulletproof.
    Can you tell me why this gear case would be slow? Do they have different gear ratio. I have the same case on a 4.0 liter v8 and I'm struggling. Any help would be appreciated.

  15. #11
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    What boat motor and How slow..?

  16. #12
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    Quote Originally Posted by idahoavenger View Post
    Can you tell me why this gear case would be slow? Do they have different gear ratio. I have the same case on a 4.0 liter v8 and I'm struggling. Any help would be appreciated.
    As said by Dave S what speed do you consider slow? What type or weight is your hull?


    Triad V21 #002 - 15in DBR 300 xs
    19' J-Craft - 175 Opti
    18' Pontoon - 115 CT 4S

  17. #13
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    Gear case

    Quote Originally Posted by V-bottom View Post
    As said by Dave S what speed do you consider slow? What type or weight is your hull?
    I have a 1991 gt300 v8 on a 21 foot avenger modified tunnel. It weighs about 1500 less the motor. I'm having a hard time getting it much over 60. It will turn 6000 with four blade 25 but only running 61 on the GPS. I tried 4 blade 28 but it won't turn that more than 5200 at 52 mph. It should be running better than that. Compression is 120 to 125 in all cylinders.

  18. #14
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    Trim button.... just kidding....# don't add up....something is wrong.

  19. #15
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    gear case

    Quote Originally Posted by Dave S View Post
    Trim button.... just kidding....# don't add up....something is wrong.
    Yeah doesn't add up. Someone said something about the gear case being slow. My gear case looks just like the one in the picture above.

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