225efi-250efi whats dif
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225efi-250efi whats dif

  1. #1
    Senior Member verman's Avatar
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    Default 225efi-250efi whats dif

    I have 1996 3.0 225 efi. I have posted this question on scream n fly too. Ok I have spent hour or so going back n fourth on parts list by serial # and I dont find a difference. ECU same part #, fuel delivery system same part #, crank n piston assembly same part #. what make one have 25 hp more???? I could spend another hour or two compairing part #s but some one on here I know can tell me thanks.

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    Canoe Jockey Michael Thomas's Avatar
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    250-225 equals 25
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

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    Senior Member Wildfire's Avatar
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    Gee Mike, that's really helpful. I hope we never have to answer a question for you. You may get a pay back. Chet
    1992 Stealth Edge
    468 BBC 670hp-dyno

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    Different tune on the ecu? Intake, exhaust? Flywheel? Heads- gasket thickness?

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    Senior Member verman's Avatar
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    I gues i had that coming because I forgot to say diff between my 225 and the 250. When I look up ecu by serial # it is the same part number, same way with complete fuel delivery assembly. I did not compare head gasket numbers.
    Last edited by verman; 08-09-2012 at 05:33 PM.

  8. #6
    Liberator Stealth
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    Quote Originally Posted by Michael Thomas View Post
    250-225 equals 25
    lmao now thats funny right there! Most of the time Larry the exhaust ports are cut to different specs. Thats what was done to my 260 to get more HP.

  9. #7
    Senior Member mercdrag 2.5's Avatar
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    the fuel management is the diff, the 225 has a 2 shutter, and the 250 has a 4 shutter system.......


    Mercury & Mercruiser Parts, FUEL MANAGEMENT SYSTEM, 225/250 EFI


    not a cheap change over....

    see you saturday larry! tom
    2008, 2012, 2013 and 2015 world series of ice drags champion prostock 800!!
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  10. #8
    Senior Member mercdrag 2.5's Avatar
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    well not to bad if this will work with all you other parts....

    FUEL RAILS & INJECTORS #827699 1 FOR 2002 MERCURY 250XB 3.0L EFI OUTBOARD MOTOR | eBay

    look to see it yours is 2 shutter? it so this is your 25hp!
    2008, 2012, 2013 and 2015 world series of ice drags champion prostock 800!!
    http://www.youtube.com/watch?v=MMfL6HI_o_8

  11. #9
    Senior Member verman's Avatar
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    thanks Tom n Brian, going to check out today. See ya saterday better bring rain gear.


    Why 's every body allways picking on me? It was funny though, theres one in every crowd

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    Senior Member verman's Avatar
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    looks like good deal but I think I need a nose cone first, I will be watching for deals like that this winter.

  13. #11
    Senior Member verman's Avatar
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    My intake has the 4 buterflys
    19 98 TPR Edge Stealth 3.0 EFI

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    Bah... HST4ME's Avatar
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    serial # please. but the fuel and ign ecms are different between the two. Simon Motorsports can reflash them reasonably and raise the rev limit.
    Last edited by HST4ME; 08-12-2012 at 11:27 PM.

  15. #13
    Senior Member verman's Avatar
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    0g275600 thanks man.
    19 98 TPR Edge Stealth 3.0 EFI

  16. #14
    Canoe Jockey Michael Thomas's Avatar
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    Quote Originally Posted by verman View Post
    thanks Tom n Brian, going to check out today. See ya saterday better bring rain gear.


    Why 's every body allways picking on me? It was funny though, theres one in every crowd
    Hey...if I didn't pick on you, I would be on the wrong side of the grass. It is just my nature to stir up the pot...I have a rule though...one dig per thread...lol
    "If you can't dazzle them with brilliance...Baffle them with bullshit"

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