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  1. #1

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    Backflushing the cooling system?

    Is it possible to unhook a coolant line on the motor somwhere to backwash the cooling system?? I think I might have some sand in there somewhere... when I was flushing out my ski tonight the water didn't rush out the exit flush hole like it usually does... it comes out 1/4 as fast as it use to... Anyone know why it's doing this?? it doesn't overheat... but my dumb ass let a girl drive it and she pulled it up on the beach and shut it off a little late.... I'm just guessing it's sand in there???? Thanks guys


  2. #2
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    It would be helpful to know what model and year?

    Shawn

  3. #3

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    04 R12x

  4. #4
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    You are already "backflushing" the motor when you connect the hose up to the outlet joint.

    Check to see if your check valve is leaking. If it is you will see water coming out the intake grate or pump when flushing.

    Shawn

    Water flow in attached file.
    Attached Files Attached Files

  5. #5
    Drummer Extraordinaire ijdal35's Avatar
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    Quote Originally Posted by NitroShark View Post
    You are already "backflushing" the motor when you connect the hose up to the outlet joint.

    Check to see if your check valve is leaking. If it is you will see water coming out the intake grate when flushing.

    Shawn

    Water flow in attached file.

    Shawn, does that flow diagram tell me that during operation, the water first entering the system goes right into oil cooler, then the cylinder, then right out the flushing connector? Wait a minute, I think I answered my own question. It does that to keep warmed water away from the inter-cooler, etc. What the hell, at least I made my second post.

  6. #6
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    That's correct.

    Also there was an intercooler by-pass added in 2003 for the 03-05 R12x and later years to help with turbo water circulation.

    Shawn

  7. #7

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    flushing to winterize

    Hi all,
    When I went to hand pump the "pink stuff" into the water intake on my 2003 F12X it used alittle over a gallon before the pink stuff shot out of the pisser hole which was good.
    When I went to do the 2004 R12x the pink stuff did not come out the pisser hole but came out from underneath even after I continued to pump more in to see if eventually it would come out and it never did as I continued to waste antifreeze. Is this normal??
    Thanks
    Todd

  8. #8
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    Your R12x has a leaking or dirty check valve. check the flow pattern above that I posted and look for the "one way valve"

    It should rattle if its ok but because it is under the front (early F12x) or rear (R12x) of the engine it's not easy to get at sometimes. Follow the procedure i posted in the PDF above about the "one way valve"

    or What you could do is clamp (pinch) off the hose coming from the jet pump then go back and add antifreeze per the manual with a funnel and hose.


    Shawn

  9. #9

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    one way valve

    Thanks Shawn, what if the one way valve was not working properly but the ski ran fine and water shooting out of the pilot water nozzle had forceful flow both when running in water and when flushing. Can I just leave things alone without damage. It sounds as though access to the one way valve is challenging and I prefer not to pay and have it fixed if it is ok.
    Any thoughts?
    Thanks, Todd

  10. #10
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    which model and year do you have?

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