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Thread: Promax

  1. #1
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    Promax

    What is the difference between a Promax 150 and a Promax 225

  2. #2
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    75hp…….

    seriously though, 5petal vs 7 petal. Big porting difference. Different ecu’s. Both great engines.


    '95 STV "The Blue Goose"


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  4. #3
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    Quote Originally Posted by mach351 View Post
    75hp…….
    if you hadn’t, I would have. Lol.
    1990 Shadow bass boat w/ 2.4 200 Merc. Totally resto'd boat and love it!

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  6. #4
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    I was expecting the 75 HP

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  8. #5
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    It's just all around different inside the block

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  10. #6
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    tha 150 PM's are just naked production motors with a few different bolt on's (ecu)........... same with tha 200 PM.
    Last edited by tlwjkw; 07-03-2022 at 02:11 AM.

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  12. #7
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    there is some good information in this article. I miss Bass and Walleye Boat magazine, even though I never fished except from row boats years ago

    Click image for larger version. 

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  14. #8
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    The 150 and 200 PM engines are just recreational motor with bling and maybe cleanup in the inside... 225 PM has the 7 pedal front and the pistons are different. 150-200 have the same piston as the fish'n motors with 2mm rings. 225 PM has it's own piston and rings assy. with the rings being 1.5mm rings and no over sized piston from Merc.
    [SIGPIC][/SIGPIC]

  15. #9
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    i had 9(so far) in my life have one now on my Bullet same pistons i owned and rebuilt all of them 200 is a FF block and 5 petals ,225 is seven petal same sleeve as 200 except it has giant champher on intake ports to speed things up a tad damn good motas

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  17. #10
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    Some inside detail of my promax 225

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