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  • #1

    '04 STX-12F question

    Hey guys, new to the site. I picked up a non-runner a couple of months ago and recently got it running (no fuel pump, battery, ignition switch, etc.). All of those items have been installed after a thorough tank clean with new plugs and it seems to be running strong. Throttle response is snappy, idles well, cooling system and overflow seem to be there (recently let it run idle for about an hour with a gallon of 91 non-ethanol and about an ounce of marine seafoam revving it up, killing and restarting). However, I don't have working instrumentation (which I may cave and overpay for one if I cannot fix it) and I have a hose coming from that area under it that doesn't connect to anything that I'm aware of. It has a plastic connector at the end and hangs down kind of close to the tank. I'm looking for a little guidance on this one since I wasn't able to find anything here.

    2004 Kawasaki JET SKI STX-12F (JT1200-B2) OEM Parts, Babbitts Kawasaki Parts House
    https://www.kawasakipartshouse.com/oemparts/l/kaw/500ba0d0f8700223e479ad9d/2004-jet-ski-stx-12f-jt1200-b2-parts
    Shop our large selection of 2004 Kawasaki JET SKI STX-12F (JT1200-B2) OEM Parts, original equipment manufacturer parts and more online or call at (231)737-4542


    Any and all help is appreciated, love the website as I am told this place is the gold standard.
    Tags: None
  • #2
    Welcome aboard, BoneSaw!

    I suspect that the hose is actually the vent for the tank. Look at the Fuel Tank parts drawing. It has a check valve and the end of the hose is open.

    It's possible that your display can be salvaged. I had one of mine repaired by Performance Design, 407-790-5642 (he prefers texts). He charges $400.

    There are also a couple of videos on YouTube that show you how to disassemble the display.
    '15 Kawi Ultra 310X
    '99 Kawi Ultra 150 (2)
    '10 Kawi Ultra LX, '13 Kawi Ultra LX, '13 Kawi Ultra LX parts 'Ski
    '04 Kawi STX 15-F, '06 STX 15-F (2)
    '91 Kawi Jet Mate
    '97 Yamaha Exciter 220 (Boat)
    '99 Yamaha Exciter 270 (Boat)
    '78 Nacra 5.2 Catamaran
    '05 Windrider WR-10 Trimaran, '05 Windrider WR-16 Trimaran
    ... and that's just the boats! I'm living proof that you can have too many toys!

    Comment

    • #3
      You might also be in SLO mode. I know I am cause my gauge is inop. Second one. Total garbage.

      Comment

      • #4
        03 and 04 do not have slo mode, if you are using a newer 12f and it is stuck in slo mode, I can flash it to 04 spec which will fix that issue. I am currently running my 07 on an 04 ecu and its been great. The 07 was also one of the ones that melted pistons and has had no issue since rebuild on the 04 computer.

        Sean
        The older I get, the more I find myself fixing things that I knew I was doing correctly at the time.​

        Ski not running well? Check HERE!

        2004 Kawasaki NAsty15f Build
        1987 Kawasaki JankyStandup Build
        2004 Kawi-Doo STX-RXT-X Build
        2001 Toyota Tundra Basketcase Build

        Comment

        • #5
          Originally posted by steve45 View Post
          Welcome aboard, BoneSaw!

          I suspect that the hose is actually the vent for the tank. Look at the Fuel Tank parts drawing. It has a check valve and the end of the hose is open.

          It's possible that your display can be salvaged. I had one of mine repaired by Performance Design, 407-790-5642 (he prefers texts). He charges $400.

          There are also a couple of videos on YouTube that show you how to disassemble the display.
          Thanks man, this site is a wealth of knowledge as I have been reading up on some of the tech guides, etc. Very helpful so far. No, this is for something else. I bought some hose and the 180* pipe fitting for the check valve that I picked up at the local AutoZone. See diagram below.


          Here is the hose (with the white stripe):



          Sean,

          That's excellent! Thank you very much for all that you do here sir.
          Attached Files
          Last edited by BoneSawsRDY!; 01-25-2023, 06:57 PM.

          Comment

          • #6
            Originally posted by BoneSawsRDY! View Post
            Thanks man, this site is a wealth of knowledge as I have been reading up on some of the tech guides, etc. Very helpful so far. No, this is for something else. I bought some hose and the 180* pipe fitting for the check valve that I picked up at the local AutoZone. See diagram below.


            Here is the hose:



            Sean,

            That's excellent! Thank you very much for all that you do here sir.
            The hose that connects to the pisser on the side has a fitting like that and runs from a nipple on the header up towards the front of the ski. Similar size and appearance to the fuel vent.

            The fuel tank vent needs to run up through the grommet in the steering base plate and into the handle bar pad, it CANNOT be left loose in the hull.

            Sean
            The older I get, the more I find myself fixing things that I knew I was doing correctly at the time.​

            Ski not running well? Check HERE!

            2004 Kawasaki NAsty15f Build
            1987 Kawasaki JankyStandup Build
            2004 Kawi-Doo STX-RXT-X Build
            2001 Toyota Tundra Basketcase Build

            Comment

            • #7
              Originally posted by smokeysevin View Post
              The hose that connects to the pisser on the side has a fitting like that and runs from a nipple on the header up towards the front of the ski. Similar size and appearance to the fuel vent.

              The fuel tank vent needs to run up through the grommet in the steering base plate and into the handle bar pad, it CANNOT be left loose in the hull.

              Sean
              Yes, the pisser on the side is fine.

              Yeah? Then what is the metal tube for? Is that part actually in the steering base? I appreciate it!

              Comment

              • #8
                Originally posted by BoneSawsRDY! View Post
                Yes, the pisser on the side is fine.

                Yeah? Then what is the metal tube for? Is that part actually in the steering base? I appreciate it!
                Yep, the metal tube runs up and hooks over the handle bars between the bar clamps. It is covered by the bar cover. The U bend is to keep water from pooling in there under normal circumstances.

                Sean
                The older I get, the more I find myself fixing things that I knew I was doing correctly at the time.​

                Ski not running well? Check HERE!

                2004 Kawasaki NAsty15f Build
                1987 Kawasaki JankyStandup Build
                2004 Kawi-Doo STX-RXT-X Build
                2001 Toyota Tundra Basketcase Build

                Comment

                • #9
                  Originally posted by smokeysevin View Post
                  Yep, the metal tube runs up and hooks over the handle bars between the bar clamps. It is covered by the bar cover. The U bend is to keep water from pooling in there under normal circumstances.

                  Sean
                  Well shit. Much appreciated, all good to go!

                  Comment

                  • #10
                    Update: Test run went well, this thing rips. Any idea if a hood from a 15F will fit my 12F? Thanks!

                    Comment

                    • #11
                      I had an '04 -12F and an '05 15F. I seem to remember that the mirror mounting was different.

                      After looking at the parts diagrams, the hoods are, indeed, different in shape, not just part number.
                      '15 Kawi Ultra 310X
                      '99 Kawi Ultra 150 (2)
                      '10 Kawi Ultra LX, '13 Kawi Ultra LX, '13 Kawi Ultra LX parts 'Ski
                      '04 Kawi STX 15-F, '06 STX 15-F (2)
                      '91 Kawi Jet Mate
                      '97 Yamaha Exciter 220 (Boat)
                      '99 Yamaha Exciter 270 (Boat)
                      '78 Nacra 5.2 Catamaran
                      '05 Windrider WR-10 Trimaran, '05 Windrider WR-16 Trimaran
                      ... and that's just the boats! I'm living proof that you can have too many toys!
                      • Likes 1

                      Comment

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