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  1. #1
    Full Throttle or Broke!!! UNSANE's Avatar
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    Perplexed-Lost Speed, but not RPM

    I've lost nearly 2+mph and I'm not sure why. After switching over to an 83mm nozzle, I ran 72.1 on the rev limiter a while back. I'm now running barely 70 (69.8 with a current) The only recent change to the ski was the replacement of the ibr system and the update to 3.3.4. Although I can't do an exact measurement on the nozzle, it is smaller then the original, so I'm assuming that wasn't changed by accident. (The 2010's used 87mm, the 2011's used 83mm, I bought a 2011 nozzle) Either way, I sent a message to find out if a nozzle was changed. I'm curious if the pump housing has to be removed and replaced to replace an ibr. The ski runs right on the rev limiter, but as soon as I let off the throttle a little, the RPM's come down. I've also heard of guys trimming some material off the buckets as well to get a cleaner output path from the pump.

    Looking for input on what to look for so it can be corrected. My backing up in neutral problem has been solved, but I've lost speed in the process.


  2. #2
    big john's Avatar
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    good ride yesterday !!!!!!!!

  3. #3
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    2mph drop is normal if going from fresh water to salt... is it that>?

  4. #4
    Full Throttle or Broke!!! UNSANE's Avatar
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    Quote Originally Posted by lolzer View Post
    2mph drop is normal if going from fresh water to salt... is it that>?
    All my numbers are from fresh and my best numbers are from a lake.

  5. #5
    Full Throttle or Broke!!! UNSANE's Avatar
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    Quote Originally Posted by big john View Post
    good ride yesterday !!!!!!!!
    Very true!

  6. #6
    I finally got ONE!!! ;) RXT-260-DOO's Avatar
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    I wonder if the new update 3.3.4 has taken the exaggeration off the on board speedometer??? Or are you using a separate device to track speed?

  7. #7
    Full Throttle or Broke!!! UNSANE's Avatar
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    Quote Originally Posted by RXT-260-DOO View Post
    I wonder if the new update 3.3.4 has taken the exaggeration off the on board speedometer??? Or are you using a separate device to track speed?
    I used my Garmin. My speedo still read 71. It usually reads 73.

  8. #8
    DaveC's Avatar
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    Have you looked at you nozzles to see if it has been switched ? Here is a pic of a 83mm on the left vs a 87mm on the right.


    Attachment 281417

  9. #9
    someone swap your prop?

  10. #10
    Full Throttle or Broke!!! UNSANE's Avatar
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    Triple checked. Right nozzle, right prop. She has been having steering issues as of late...

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