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  1. #16
    Join Date
    Dec 2011
    Location
    Ottawa,canada
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    Dave built my '04 200 efi,on my paramount 21, 2 yrs. ago with wsm pistons,and the thing runs great,no issues pushes that 1800 lb. hull to 60 mph,real quick,I bought a 240 sport jet block from him,and a blown promax, and he's rebuilding it with wsm's for me this winter for my AE-21,I have no reason to doubt those pistons,shane and max are both running 90+,every wknd. with their pm's.

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  3. #17
    Join Date
    Aug 2011
    Location
    Ontario
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    Thanks for the info on the WSM pistons guys... they sound like they may be the ticket.
    Has anyone ever had them top pinned?
    I'm pulling the motor apart tomorrow and are picking up the new block next week.
    1986 Hydrostream Valero YT - Fully restored '12.
    1997 225 Promax.

  4. #18
    Join Date
    Sep 2003
    Location
    florence sc
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    Pro marine website says they have std,.015,and .030 vertex in stock at the moment, but it changes quickly. I've never used the wsm before,but would like to hear more about them

  5. #19
    Join Date
    Mar 2011
    Location
    Carrollton VA
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    Newest WSM catalog I saw now has the Promax piston (with the 1,5 mm) ring at 99$ dealer and 167$ retail. They are a good piston, but I think they may have lost a lot of potential sales jacking up the price.
    Go Time
    2003XS GS 225 Promax
    26 Regulator twin 250 EFI

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