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  • engine questions

    I have a 1993 seasoo xp with the stock engine I believe it is a 650 /657. According to one rescorce it was rated at 55 hp. Now however I see the same engine in a 1995 spx rated at 80 hp? I am slightly confused. If it is infact the same engine where did the 25 horses go, and is there a way to modify this ski to get more bang for my buck. I know the spx is faster, because I have raced it with a friend on the lake and I got my cookies handed to me:)
    I have to replace the engine in the xp ski since it locked up due to a bad oil pump, and I would like to get a little more power out of it, I origially thought is was a 587 motor but now I see it is the 657 motor. So how does the same motor produce the different power in different skies. the spx and the xp are both 8 ft skies with the same basic body.

    also just for fun, could someone outline for me the diffence between the xp, the sp, and the spx ( or sxp or whatever)

    Thanks

    PS the 95 spx said "Sport" on it I think? thoughts anyone.

    Thanks also to everyone for their insite on my previous posts, I 've got all my skies running great now.
    See you on the water!

  • #2
    Re: engine questions

    they all had 80 horse. not much difference other than the hoods I believe. Flame arrestors/jets, cut the head for more compression, or put a pipe on it good bang for buck

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    • #3
      Re: engine questions

      is it the 657x motor cause that one put out alot more pop than the regular 650 engine

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      • #4
        Re: engine questions

        the 657 was 65 or 70 hp the 720 was 85hp
        PRIDE IN SERVICE<br /> <img src="http://www.sbtontheweb.com/images/forposts/4609/1.jpg" alt=" - " />

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