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  1. #1
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    Mar 2011
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    Super nice 225 Promax

    Mercury Racing 225 Promax with essentially a new powerhead. Engine was built with a new factory block, piston kits (WSM with 1.5mm rings), steel cage rod bearings, all new electrical components (regulators, stator, trigger & switch boxes). A32 ECU that was just serviced at Simon motorsports w/ a year warranty. New TDR reeds, injectors cleaned & flowed. All new cooling components - poppet valve, thermostats & waterpump. The engine has about 15 hours on it for break-in, testing and tuning. Factory Promax midsection, Alien Style Factory light weight cowls. Ratcheting 1.87 lower unit with welded Bobs cone lower water pickup and torque tab on skeg. Probably forgetting a bunch. The motor looks new and run great. A Promax I built that is identical to this one peaked at 242 HP on the dyno. The only reason Iím selling it as I just bought my old 280 back and something has to go. Motor can be demonstrated and installation is available. Trades-ins of similar Mercury outboards will be considered. $7800 Firm, Call or Text me (Mark) at 757-84six-897one.

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    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

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  3. #2
    Join Date
    May 2001
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    Indiana
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    You have leak-down numbers?

  4. #3
    Join Date
    Mar 2011
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    Carrollton VA
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    All leak down was less than 4%. The powerhead is essentially new.
    Compression
    1-148#
    2-145#
    3-150#
    4-148#
    5-148#
    6-146#

    Leakdown
    1- 3%
    2- 3%
    3- 2%
    4- 3%
    5- 2%
    6- 3%
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

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