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  1. #1

    gtx di rpms & speed

    Hi guys ,
    Does any one know what rpm & speed would be reasonable on a standard 2002 Seadoo gtx di 951?

    I get around 6600/6700 rpm and the speedo shows 42mph. Anyone know ? Do the speedo's under or over rate the actual speed on them ?

    I thought It would have been more top end but I know these speedos are a bit rubbish. It's a lovely clean machine , the compression is perfect at 140psi each, 60 hrs,new plugs, engines runs very smooth, digs out of the hole nicely all seams fine just wondering about the speed really.



  2. #2
    ncdoo's Avatar
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    You should be seeing a few more rpms, maybe 6800 -6900 depends on the prop. Top speed should be around 58-62. The speedo normally reads high but if the paddle wheel is damaged, its possible to read low. GPS it to see the actual speed. It should be a lot faster than 42 mph.

  3. #3
    Quote Originally Posted by ncdoo View Post
    You should be seeing a few more rpms, maybe 6800 -6900 depends on the prop. Top speed should be around 58-62. The speedo normally reads high but if the paddle wheel is damaged, its possible to read low. GPS it to see the actual speed. It should be a lot faster than 42 mph.

    Ok Brill. Ill check the paddle as well. I'll take my little gps satnav thing and try it. I could very well get 6800 but I am on a lake and didnt have much spare room!

  4. #4
    There is no possible way for a 2002 GTX DI to run 58-62. The carb versions of the earlier smaller frame GTX's built up to 2001 ran in the 55-56 range typically, the DI's ran maybe a MPH or so slower at 54-55. In 2002, they came out with the new large hull GTX to accommodate the 4TEC, and for whatever reason they put the DI engine in that hull. It runs a good 2-3 MPH slower. Bottom line is that a 2002 GTX DI is a 51-53 MPH ski.
    But I agree it should be much faster than 42, but you will need to check your true speed via GPS.

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