pxctoday

» Log in

User Name:

Password:

Not a member yet?
Register Now!

» Find OEM Parts

» Jobs

» wallpapers

Results 1 to 5 of 5

Thread: Superjet Lag

  1. #1
    PWCToday Newbie
    Join Date
    Jun 2017
    Location
    Connecticut
    Age
    23
    Posts
    28

    Superjet Lag

    Hi guys, I'm having some issues with jet lag. I have a 2001 superjet, all stock, accept for the full scoop grate and hooker 9/15. When I punch the throttle at low speeds, the RPM's sound like they ramp up immediately, but the ski doesn't accelerate immediately. The ski is giving me about .5 - 1 full second of slow acceleration before it really pulls hard. This is making my ski feel sluggish.


    I understand that a stock superjet is no flat water backflip ski that should rip my arms off, but I would expect the acceleration to be proportional to the rpm curve. I have looked at the pump and see no gap between the wear ring and OD of the impeller. Any body else experience this? Thanks!

  2. #2
    PWCToday Newbie
    Join Date
    May 2016
    Location
    Tampa, FL
    Age
    29
    Posts
    6

    Superjet Lag

    What youíre explaining sounds like a wear ring or impeller problem. Although itís kind of rare if it still has the factory stainless steel wear ring. Can you get a video of it doing this so we can hear how the rpmís are climbing? Also Iím sure you checked already but make sure thereís nothing stuck in the pump tunnel, I had a water stuck in there one time that caused a similar issue that I couldnít see just by looking under the ski.


    Sent from my iPhone using Tapatalk
    Last edited by Egkid; 12-04-2017 at 08:50 AM.

  3. #3
    PWCToday.com Is My Home Away From Home john zigler's Avatar
    Join Date
    Mar 2003
    Location
    wisconsin
    Age
    50
    Posts
    9,766

    Re: Superjet Lag

    Agreed. Sounds like cavitation. COuld be from bad/bent impeller, bad pump seal, pump shoe, intake scoop, etc.

    I have had cases where everything looks OK, until you take it apart, and then and only then can you see the impeller is bent, etc.
    RCJS also doing business as WATCON
    608-743-1305 9am to 5pm CST m-f
    email watcon@watcon.com

    Please visit our web sites

    new parts / products / services www.watcon.com
    used parts www.rockcountyjetski.webs.com
    thank you

    Please check out and like WATCON on Facebook

  4. #4
    PWCToday Newbie
    Join Date
    Jun 2017
    Location
    Connecticut
    Age
    23
    Posts
    28

    Re: Superjet Lag

    [QUOTE=Egkid;4458202]What you’re explaining sounds like a wear ring or impeller problem. Although it’s kind of rare if it still has the factory stainless steel wear ring. Can you get a video of it doing this so we can hear how the rpm’s are climbing? Also I’m sure you checked already but make sure there’s nothing stuck in the pump tunnel, I had a water stuck in there one time that caused a similar issue that I couldn’t see just by looking under the ski.


    I put in a brand new hooker 9/15 a few weeks ago, thinking that the dings in my previous hooker (for sale on pwc) was causing the issue. But the new impeller made no difference. Having taken the pump out to do this, I noticed no defects or lodged objects in the pump.

    I will try to see if any of my videos have that sound we are looking for. If not, it will have to wait till next year because the water is freezing up in CT. I can definitely say that there is gouge in the hull, right at the tip of the pump shoe, where the shoe is actually not in contact with the hull anymore because of the gouge (see the pic below, hard to notice, the gouge along the shoe, left side of hull).

    Perhaps the rpm's are not increasing immediately, and it only sounds like they are. This would mean I have a tuning issue or low compression maybe.

    IMG_7452.JPG

  5. #5
    I dream skis JC-SuperJet's Avatar
    Join Date
    Jul 2013
    Location
    Cypress, TX
    Posts
    710

    Re: Superjet Lag

    Repair that gouge and fair it properly. Or at the very least, fill it with silicone. Air may be entering the pump thru that gouge, causing cavitation.

Thread Information

Users Browsing this Thread

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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBadvanced CMPS v4.2.0