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test running ski

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  • test running ski

    i'm thinking about buying my first jet ski. its gonna be used so i was wondering if there is any way to start them out of the water. do you need to hook up a hose or just not run them very long? i'm clueless on it.

  • #2
    Re: test running ski

    Most nowdays have a hose hookup on the top of the manifold. It's a 20 plastic part, well, was in my case.

    Otherwise, I never ran it more than 1 minute when out of water.

    What ski are you looking at? We had skiis for 15 years, they are fun.
    Spark, Air and Fuel... all you need.... well, and beer!

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    • #3
      Re: test running ski

      Depends on the ski. The 4 stroke we just bought has a closed cooling system so you can start it on the trailer as long as you don't go crazy with it. Make sure you water test it - having it run on the trailer under no load doesn't mean a thing.
      2012 Malibu VTX 5.7 Monsoon 350
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      • #4
        Re: test running ski

        Originally posted by oldjeep View Post
        Make sure you water test it - having it run on the trailer under no load doesn't mean a thing.
        +1 on that.

        Depending on the ski, there should either be a hose hookup under the seat or in the rear, next to the jet drive. Make sure you start the ski before turning on the water flow and shut off the water before shutting off the ski (opposite of a boat engine). Running the water before the engine starts runs the risk of water pushing thru the exhaust manifold, back into the engine. This will hydrolock the engine, causing roughly $1000 in damage.
        2001 Carver Voyager 374 'Stick's Competition'

        Something tells me I should be on the water....

        If I answer your upholstery questions, it's only because I've been doing it 20+ years...

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        • #5
          Re: test running ski

          Originally posted by oldjeep View Post
          having it run on the trailer under no load doesn't mean a thing.
          +2

          Many skis will start and run great on the trailer with no load.........put the same ski in the water and it bogs and dies. Doing a test ride is a must to really test the engine and pump system. A compression check is another good idea for 2 stroke skis.
          2010 Hurricane 2100 Sundeck (217 SD)
          2008 Yamaha F150 TXR Outboard
          2008 Yamaha FXHO Cruiser Waverunner

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          • #6
            Re: test running ski

            You can do a quick start with a couple of throttle rev's, but don't run longer than 30 seconds. I do this every time I pull out of the lake just to clear out the exhaust of any standing water. This will only tell you that it cranks....The real test comes when it's in the water underload.
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            People are like trees....
            Most provide great comfort, while some just occupy space & stunt the growth of others.

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            • #7
              Re: test running ski

              My first ski was a spur of the moment craigslist ski.....cranked right up on the trailer....didnt run well at all on the water. My second ski i didnt water test....but i very thoroughly ran it on the hose and listened to the entire throttle range....and the previous owner even showed me pictures and a video on his camera that was time stamped from the previous weekend which gained my trust a little bit. But yes....get some sort of proof that it runs on the water.

              On a side note....I got suckered into the reasoning on the first ski "well its cosmetically in bad shape but mechanically it seems good"

              If its been cosmetically beat up and abused...most likely it has been abused in other ways as well...


              of course I only had a 600 dollar budget to work with

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              • #8
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                Re: test running ski

                Originally posted by Ernest T View Post
                +2

                Many skis will start and run great on the trailer with no load.........put the same ski in the water and it bogs and dies. Doing a test ride is a must to really test the engine and pump system. A compression check is another good idea for 2 stroke skis.
                +3 on that. I've seen jet skis that were running on 2 out of 3 cylinders run just fine on the trailer, but put them in the water and they bog.

                Buy a compression tester and check all cylinders. Typical 2 stroke PWC compression is about 130-160 PSI
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                Jet skiing, target shooting, fishing, jet-boating, and even doing a little oyster harvesting with Larry The Cable Guy. Check it out at:

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