496 mag vs 496ho
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496 mag vs 496ho

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    "BOUGHT NOT BUILT" 2FORCEFULL's Avatar
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    Default 496 mag vs 496ho

    whats the difference?

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    Quote Originally Posted by 2FORCEFULL View Post
    whats the difference?
    The "h" and the "o".

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    @ The Islander OutCole'd's Avatar
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    Quote Originally Posted by Badaxe View Post
    The "h" and the "o".


    Some Hp.
    <img src=http://www.performanceboats.com//signaturepics/sigpic640_1.gif border=0 alt= />

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    when the first came out the 425 HP one had forged parts, and the 375 didn't. But Merc changed that. Now they both have cast parts. Only major difference is the cam.

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    I think they have the same short block, are the heads the same,
    same compression?

    I know that they are 40 hp more

    385 vs 425, but how is made?

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    cam and programing, as stated earlier, the first HO's had forged crank and pistons, now the entire assembly is the same except the cam, and there are some programing changes due to the cam



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    Quote Originally Posted by gn7 View Post
    cam and programing, as stated earlier, the first HO's had forged crank and pistons, now the entire assembly is the same except the cam, and there are some programing changes due to the cam
    Yup, this got hashed out a year or so ago. Camshaft and ECM programming. EVERYTHING else is the same.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    so if you raylar a 496 mag, you get more hp per buck?

    they end up the same in the end right?

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    Quote Originally Posted by 2FORCEFULL View Post
    so if you raylar a 496 mag, you get more hp per buck?

    they end up the same in the end right?
    Correct. Same-same
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Quote Originally Posted by 2FORCEFULL View Post
    I think they have the same short block, are the heads the same,
    same compression?

    I know that they are 40 hp more

    385 vs 425, but how is made?
    Unless they have changed it recently it's 375 vs 425 (50hp)

    I believe the difference is in the cams and the ECM programing, as stated above.

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    just looked at the merc marine site,
    the new ones are 420 vs 370

    and they say wot rpms is only 4200/4600

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    Quote Originally Posted by 2FORCEFULL View Post
    just looked at the merc marine site,
    the new ones are 420 vs 370

    and they say wot rpms is only 4200/4600
    Thats the rating on their Inboards, not their I/O. I/O's are still 425 and 375. 5000 for the 425 and 4800 for th e375

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    Quote Originally Posted by 5325user View Post
    Thats the rating on their Inboards, not their I/O. I/O's are still 425 and 375. 5000 for the 425 and 4800 for th e375
    yep, you're right. just check'd

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