Results 1 to 4 of 4
  1. #1

    2005 ultra 150 hole shot cavitation

    Any idea what might need to Replaced/fixed?

    Is this just an impeller situation or could it be something more than that? You can feel the prop kinda slipping when the ski first takes off....the hole shot is definitely lacking power... Maximum speed on the dreamometer was 57, at 7k rpm, in flat water, stock prop......it also seems like low speed for that much rpm, right? I weigh 200lbs...the guy who owns it said he drives up on the beaches all time... />

    Please advise, thanks for your help guys!!!!


  2. #2
    witness140's Avatar
    Join Date
    Aug 2010
    Location
    Northeast
    Posts
    140
    +1
    1
    I was told and I've read repeatedly that a poorly sealed rideplate -specifically the eyeglass seal - is the usual culprit of hole shot cavitation on the Ultra 150.

    However, that being said, I had a similar situation with my 99 when I first got it. The machine had a Nu-Jet impeller that had a small ding in one trailing edge. I did not touch the rideplate, but when the pump was done by skiworx and I ran it with a good modded stock impeller - cavitation was gone.

    So if impeller is good, I'd maybe think about the seal. I'd also check the impeller clearance too just to see where it is at.

  3. #3
    Quote Originally Posted by witness140 View Post
    I was told and I've read repeatedly that a poorly sealed rideplate -specifically the eyeglass seal - is the usual culprit of hole shot cavitation on the Ultra 150.

    However, that being said, I had a similar situation with my 99 when I first got it. The machine had a Nu-Jet impeller that had a small ding in one trailing edge. I did not touch the rideplate, but when the pump was done by skiworx and I ran it with a good modded stock impeller - cavitation was gone.

    So if impeller is good, I'd maybe think about the seal. I'd also check the impeller clearance too just to see where it is at.

    In order to check the imp clearence I have to pull the pump out, right?

  4. #4
    witness140's Avatar
    Join Date
    Aug 2010
    Location
    Northeast
    Posts
    140
    +1
    1
    Correct. That is how it's usually done. Unless you want to pull the rideplate and intake grate, and then lay on your back and reach up into the pump with a flashlight and feeler gauges.

    Pulling the pump involves 4 nuts, 2 hex bolts (from bottom) and 2 linkage bolts. Then it's just luck of the draw if yours is 'happy' where it is or if comes out relatively easily. I used a rubber mallet and just tapped the case sides, alternating left, right, and bottom. Over and over, wiggle wiggle, pull. Eventually it came out. Based on what I read over on the Ultra forum, I think you should pull the pump and give it all a look. Feel the bearings, check the clearance, check the impeller, etc.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 2005 ultra 150
    By DILTS in forum Kawasaki PWC Performance (2-stroke)
    Replies: 1
    Last Post: 05-31-2011, 05:11 PM
  2. WTB 2005 Ultra 150 Aftermarket parts
    By JohnnyGtiSe in forum Kawasaki Classifieds
    Replies: 1
    Last Post: 07-11-2010, 09:23 PM
  3. 2005 Ultra 150 with ADA heads... can I run a 1999 ignition with the NGK BR9ES?
    By Mitch 05 Ultra 150 in forum Kawasaki PWC Performance (2-stroke)
    Replies: 2
    Last Post: 07-02-2010, 05:53 PM
  4. 2005 ultra 150 issues
    By KajunKue in forum Kawasaki PWC Performance (2-stroke)
    Replies: 5
    Last Post: 05-01-2010, 08:43 AM
  5. Ultra 150 - hole in case
    By crazymike in forum Kawasaki PWC Performance (2-stroke)
    Replies: 2
    Last Post: 07-13-2009, 09:06 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •