Results 1 to 8 of 8
  1. #1
    Sharkdiver1125's Avatar
    Join Date
    Apr 2015
    Location
    Chesapeake bay MD
    Posts
    205
    +1
    34

    2012 rxtx 80psi of compression but runs fine

    I have a 2012 rxtx 260 I bought brand new, now has 140hrs. I've had minor issues with the ski but nothing serious. Although It has ingested loads of salt water, 10 hours run time on a badly leaking intercooler and also having water being sucked through holes in a kanaflex intake. I have some minor mods, no valve train or interval work just a 8350 vtech reflash and a et137+4 supercharger wheel. All 3 cylinders Are at exaxtly 80 psi of compression and I hAve double checked the gauge on other skis and they are where they should be. All the threads I read people with compression under 100psi are freaking out and replacing motors. My ski is running strong as ever (78.7 GPS at 8300rpm, 13psi boost, 12.0 afr). Anybody have any opinions on this?


  2. #2
    GRF + DashPac:) seadoo02xp's Avatar
    Join Date
    Apr 2005
    Location
    MO
    Posts
    4,771
    +1
    1,037
    Wow that's a little low but if it runs fine and doesn't burn oil just ride it!!!

    Compression numbers used to make me crazy years ago . These days I look to make sure they are even across the board.

    Was this compression test done cold?

  3. #3
    krouchchocolate's Avatar
    Join Date
    Nov 2009
    Location
    Houston, TX
    Posts
    1,262
    +1
    56
    Quote Originally Posted by seadoo02xp View Post
    Wow that's a little low but if it runs fine and doesn't burn oil just ride it!!!

    Compression numbers used to make me crazy years ago . These days I look to make sure they are even across the board.

    Was this compression test done cold?
    Yeah mines is doing that too. Started off with 130 psi when I had my motor rebuilt with CP pistons. Now it is at 115 all across the board. I think it is my timing since I do not have the rotax racing chain tensioner. My head has been decked twice and block once.

  4. #4
    GRF + DashPac:) seadoo02xp's Avatar
    Join Date
    Apr 2005
    Location
    MO
    Posts
    4,771
    +1
    1,037
    If she runs good just ride it!!

    How's your junk doin mr chocolate ?

  5. #5
    krouchchocolate's Avatar
    Join Date
    Nov 2009
    Location
    Houston, TX
    Posts
    1,262
    +1
    56
    Quote Originally Posted by seadoo02xp View Post
    If she runs good just ride it!!

    How's your junk doin mr chocolate ?
    have not had the chance to ride it yet! Been out of town for work. Will keep you updated!

  6. #6
    Sharkdiver1125's Avatar
    Join Date
    Apr 2015
    Location
    Chesapeake bay MD
    Posts
    205
    +1
    34
    No it doesn't burn any more oil than normal, but the compression is the same hot and cold

  7. #7
    GRF + DashPac:) seadoo02xp's Avatar
    Join Date
    Apr 2005
    Location
    MO
    Posts
    4,771
    +1
    1,037
    Quote Originally Posted by Sharkdiver1125 View Post
    No it doesn't burn any more oil than normal, but the compression is the same hot and cold
    If it were me I would ride it! Maybe have another look at it after the season is over

  8. #8
    98gsxl951's Avatar
    Join Date
    Jul 2008
    Location
    On my ski, on the CT river
    Posts
    883
    +1
    3
    maybe try a new compression guage........ nm, just read the entire post.

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. SPX - No beeps but runs fine
    By Lord Helmet in forum Sea Doo Open Discussion
    Replies: 2
    Last Post: 06-02-2014, 09:28 AM
  2. Replies: 6
    Last Post: 07-05-2012, 10:40 AM
  3. Replies: 16
    Last Post: 12-29-2011, 10:09 PM
  4. Replies: 18
    Last Post: 11-05-2011, 04:42 PM
  5. MSX 150 with low compression but runs 60mph
    By DerekMart in forum MSX/Matrix
    Replies: 9
    Last Post: 08-05-2011, 08:50 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
  •