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  1. #1
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    How to determine if you have 2.5 FF block

    I have two 2.5 carb power heads on my boat that i am going to be selling. How do you determine if they are ff blocks. thanks, mike

  2. #2
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    Should have FF stamped behind the timing arm. Right where the two halves meet each other.

    Before the FF it was EE (200).
    http://www.geocities.com/fletcher_arrowbeau

    Fletcher 17F6
    Hydrostream HST 20F

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  4. #3
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    Big, thanks for the reply. What makes these desirable? What years were the produced?

  5. #4
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    I think 94 up til oring came out. The promax 200 is made from ff block ,just no paint on pm 200 the diffrence in the 200 and 225 is front half and ecu and 225 has larger exhaust dumps at bottom of block. But all sleeve porting is same between ff and 225pm and has same (big) exhaust chest. The EE blocks have smaller porting and smaller exhaust chest but they make great torque. Hope it helps

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  7. #5
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    I have a FF block and got a spare EE block. Havent been able to try the EE out yet.
    Realy wonder how it will perform compared to the FF. Both are stock and carburated.
    http://www.geocities.com/fletcher_arrowbeau

    Fletcher 17F6
    Hydrostream HST 20F

  8. #6
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    Quote Originally Posted by Merc 2.5 View Post
    I think 94 up til oring came out. The promax 200 is made from ff block ,just no paint on pm 200 the diffrence in the 200 and 225 is front half and ecu and 225 has larger exhaust dumps at bottom of block. But all sleeve porting is same between ff and 225pm and has same (big) exhaust chest. The EE blocks have smaller porting and smaller exhaust chest but they make great torque. Hope it helps

    Are all ProMax motors not painted? What exactly is different about the 225 front half?
    Hydrostream dreamin

  9. #7
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    I have 2, a 98 and a 96 EFI FF block 200's. Very strong runners. The best non hipo engine there is in the 2.5 series. Push my v-king into the 80's. They make about 220 ponies easy.

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  11. #8
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    Agreed, the FF is as good a platform to build off of as anything and makes great power. Mine is pretty mild and has pushed my STV over 100 pretty easily and with a prop change it's a nasty beast from a dig! Just an all around great engine.

    Quote Originally Posted by XstreamVking View Post
    I have 2, a 98 and a 96 EFI FF block 200's. Very strong runners. The best non hipo engine there is in the 2.5 series. Push my v-king into the 80's. They make about 220 ponies easy.

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  13. #9
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    Quote Originally Posted by LakeFever View Post
    Are all ProMax motors not painted? What exactly is different about the 225 front half?
    If its a reman its likely to have paint but if stock it won't ha e paint. Ff and 200pm have 4 pedal. 225 has 7 pedal

  14. #10
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    Quote Originally Posted by Noah Burns View Post
    Agreed, the FF is as good a platform to build off of as anything and makes great power. Mine is pretty mild and has pushed my STV over 100 pretty easily and with a prop change it's a nasty beast from a dig! Just an all around great engine.
    mine is a mildish build ff and I got a pretty heavy bass boat and with a 28 I can hit 80 or 82. Not screamin fast but runs good and I beat it to death but stay on the maintenance. Great motor. I have a modified promax im in process building but the port work little more extensive and will be goin on alot lighter boat

  15. #11
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    Quote Originally Posted by mragu View Post
    What makes these desirable?
    Powerheads are worth about $10,000 each



  16. #12
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    Damn I wish

  17. #13
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    Quote Originally Posted by transomstand View Post
    Powerheads are worth about $10,000 each
    why do you say that?

  18. #14
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    Quote Originally Posted by mragu View Post
    why do you say that?
    Ever since the whole world got FF happy, people price them higher than a 300 drag



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  20. #15
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    I kinda like the EE block more better.

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