Thread: Xb2003 250xb ??

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  1. #1
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    Xb2003 250xb ??

    Posting this for a friend. His looking to get a bigger motor but dosnt want to pay the price tag that promax are selling for. He can get a good deal in a 250XB. Would this motor be to heavy for this hull ?

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    #2
    Allison does not recommend any motor over 400 pounds. An XB2003 was designed with a 2.5 liter Mercury as power. However, some guys run a 3 liter with no problems.

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    #3
    Allison xb2003 and a 250 VMAX SHO 4 stroke

    It's been done a bunch but as always, proceed at your own risk since the manufacturer strongly recommends against it.

    If I could not have found a nice newer 2.5, I would have been one of the guys buying a new 250Pro XS to place on the back on my 2003. Less offset and correct weight placement means a lot but there are a couple of other necessities that I would have performed to be on the safe side.
    Last edited by scj; 03-31-2014 at 05:17 PM.

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    #4
    I witnessed 2 grandsports at the rally that ran awesome with 3L motors. If they are set up correctly they will be fine. SCJ, are you having Lee build you a motor or buying a 260 from New York??

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    #5
    Quote Originally Posted by mstine06 View Post
    I witnessed 2 grandsports at the rally that ran awesome with 3L motors. If they are set up correctly they will be fine. SCJ, are you having Lee build you a motor or buying a 260 from New York??
    Maybe both..........

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    #6
    If you buy that 260 I'd suggest having Lee build you a good 225 for a backup! Lol

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    #7
    How much offset are the guys with the 3L running ?

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    #8
    I thought the max was 450 lbs? I tried a rude etec 250 on a xb2002 and it was way to heavy. The stern never lifted correctly to fly like a Allison is supposed to.
    Last edited by 26 chopper; 04-05-2014 at 01:24 AM.

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    #9
    The XB only weighs 455-465

    I have always wanted to see an ally with an XB.

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    #10
    He better trade it for my 200

  11. Member
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    #11
    Quote Originally Posted by hyperflow View Post
    How much offset are the guys with the 3L running ?
    The one thread I read that seemed where the guy put a lot of work and thought into it ran his at 5" back.

    The warning label on my '08 XB-2003 says 440 lbs. The Allison hydraulic jack-plate says 440 lbs. as well.
    Darris told me personally he listed 440 lbs. specifically as that is what a 2.5 liter Mercury weighs complete. He said a 2.5 Mercury set 14" back with max height being center of prop even with pad is safe on my boat "but" too much trim on the engine could cause blow out of course.

    Now, if someone were to figure out what load is placed on the transom running 14" back at 440 lbs. and stay within those boundaries for weight on the transom, that would be a good starting point.
    For me to feel safe, I'd want to figure out what load is placed against the boat side to side with a 2.5 liter engine running a 20" mid section to see if a 3.0 liter with a 15" mid section would be close to the same since the 3.0 liter carries weight higher (prop even with pad as a basis). Who builds a 15" mid section for the 3.0 liter?

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    #12
    Here's a deal on one that I just found. 2013 15" 300xs Taylor Machine makes them newpage

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    #13
    I believe micheal Chapman out of south Carolina will cut one down and re weld it. His work looks very nice.

  14. Member cajunrgfm's Avatar
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    #14
    Quote Originally Posted by ThunderCat View Post
    The XB only weighs 455-465

    I have always wanted to see an ally with an XB.
    I think my 250 xb weighs less than 445lbs. I have a 300pmax mid and 3 ram clamp with alien cowling, 12" setback on my 97 xb03, buddy has glenn reynolds xb03 with 250xs, no issues

  15. Member K-DAWG's Avatar
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    #15
    I have a 225 Pro XS on mine and it runs great. I am running 13" of set back and thinking about going to 15".