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  1. #1

    1998 GTX should I buy?

    I found a 1998 GTX on a nice single place zieman trailer. hull is in good condition, motor is clean,starts right up. It has 240 hrs on it. The owner rebuilt the top end in 2004 with stock bore wiesco pistons. I did a compression test, and each cylinder is at 115. Has a nice seadoo cover, shop manual. I currently have a 1997 gti with 717 motor, and its nice and reliable. Question is, how reliable is the 947 engine? should I stick with another gti, or go for the power of the gtx? any of your thoughts are appreciated. Guy will sell it to me for $2,000. what do ya think? oh yea, he says that the amount of hrs on it since top end is 60hrs.


  2. #2
    115 is low - 135 to 150 in more normal.. If it was 115 per cylinder it could be your gauge.. BUT the owner did not rebuild the top end - he just installed new stock size pistons other wise it would have been bored an oversized... The pistons my have 60 hrs but the cylinders have 200 hrs and may be the reason for low compression as well and it may need a complete rebuild in the near future ($1000-1500) That boat should do about 70 by the speedo and turn around 7000 RPM and for 2k not a bad price...

  3. #3
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    do a bunch of reading on 951 and then decide if you really want one....

  4. #4
    Quote Originally Posted by nmpeter View Post
    do a bunch of reading on 951 and then decide if you really want one....
    I have done some. So what you are really saying is to stay with a 717 or a 787, correct?

  5. #5
    Quote Originally Posted by doubled View Post
    I have done some. So what you are really saying is to stay with a 717 or a 787, correct?
    IF properly taken care of AND maintained, the 951 can be a great engine. The 787 and 720 are much more forgiving. Also, when the 951's fail, they tend to fail spectacularly. The pistons are very large, and when the engine ingests water, the skirts can slightly colapse, allowing the piston to rock slightly in the bore, eventually shattering the piston skirts. I have had a 951, taken care of it, and didn't have any issues.

  6. #6
    I would pick a 951 over the competitor's comperably powered engine.

  7. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    951 are nice machines..but the ride isn't what i prefer..and yes the engines can be very problematic (if you get one that wasn't maintained) as stated..water ingestion is a problem. the intakes are very low in the hull. Engines are pricey and most cores have been welded from rod breakage. In two strokes I really like the 97 gtx 787.

    I'm just saying be sure you know the issues of 951 before making a commitment to one.

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