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  1. #1
    Member
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    Nov 2009
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    covington,ga
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    821

    adding horseys to 225 promax

    hello guys, i have a 98 225 promax with about 110 hours on it and was wanting to add some horse power. what would ya'll recommend would be my first step in gaining altleast 5 to 10 more horseys? thanks for any advice guys

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  3. Member
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    Sep 2004
    Location
    Old River- Winfree , TEXAS
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    #2

    Re: adding horseys to 225 promax (jcmangos)

    I cut heads daily for the 225 Pro max motors , the increase in bottom torque is amazing all for less than $200.00 and on pump gas....

    Thats the QUICKEST and less intrusive way to bump a motor 5-10 HP in an afternoon ( what you asked for ) ..Most feel the big difference on the bottom and miid range and its not uncommon for the top to pick up much as 1-3 MPH..

    Jay

  4. Member
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    Nov 2009
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    covington,ga
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    #3

    Re: adding horseys to 225 promax (JaySmithRacing)

    jay,thanks for chiming in...your the best bro but i was wondering ,what will it do with top end? i have a 21xd bullet. does it really save on gas? thanks again jay i was also thinking about top pinning my motor, what price range would that be in and would you recommend it? is it worth the money invested?

  5. Member
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    Nov 2009
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    covington,ga
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    #4

    Re: adding horseys to 225 promax (jcmangos)

    jay, about how much more horse power would my motor get if i would buy some high performance con bearings and top pinning the motor as well as cutting the heads like you advised? thanks jay

  6. Mercury - 3 Liter Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
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    Greenville, SC (US)
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    48,396
    #5

    Re: adding horseys to 225 promax (jcmangos)

    Juan:

    That's a lot of variables and questions... and results will depend on exactly what you have done to YOUR engine.

    Why not give Jay a call to discuss this..... he's probably out there building motors this week.




    Dual Mercury Master Technician- for Mercury Outboards, Racing & Mercruiser Sterndrives in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 38 years (learn something new every day).
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  7. Member
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    Nov 2009
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    covington,ga
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    #6

    Re: adding horseys to 225 promax (EuropeanAM)

    your right, i think i will give him a buzz. try to call at the end of day,i know i wouldn't want to be bothered in the middle of a busy day with questions. thanks

  8. Member
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    Jun 2009
    Location
    Bedford
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    2,607
    #7

    Re: adding horseys to 225 promax (jcmangos)

    I would move the pump to the boat get rid of the pre detonate boxes. change reeds CCRs have worked good for me cut the heads and pre mix my gas
    I Drive a Allison because I can Drive a Allison

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