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  1. #1
    Watcon's Avatar
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    Fuel Injection Pressure question

    I need to offer as fuel pressure kit on my website. It needs to be safe & simple.
    How are you guys testing the fuel pressure / splicing into the mail line safely that will not cause a potential leak?

    Photos & assistance would be gratly appreciated ,as I don't have a ski here to use as a test model. [email protected]

    Thak you,
    Randy


  2. #2
    Moderator beerdart's Avatar
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    I think some are using the Seadoo Schrader style valve Item #43 it is 5/16 (8mm) barb.
    SKU: 293710104 Bleed Valve $9.62


  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Watcon View Post
    I need to offer as fuel pressure kit on my website...
    For what engine type? Weber?

  4. #4
    Watcon's Avatar
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    Thanks for the tip B-Dart...
    I am looking to maka a kit for the Weber, but the direct injected MSX, etc is basically the same...

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Watcon View Post
    ...I am looking to make a kit for the Weber, but the direct injected MSX, etc is basically the same...
    The Schrader tee used by Polaris sometimes comes apart internally and releases the metal insert holding the schrader valve. Then the only thing holding the fuel in is the plastic dust cap, which of course is not good.

    How much fuel pressure (peak) does the tee and valve need to withstand on the Weber system?

    If you clamp off the return line into the tank (or it clogs), how high can the fuel pressure get?

  6. #6
    Kosh's Avatar
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    Heres a test point pic of my 03 MSX150

    Cheers
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #7
    Watcon's Avatar
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    Thanks Kosh,
    Where did you get that?

    447, In response to your question, it must hold 80 PSI peak..


    Regards,
    Randy

  8. #8
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Kosh View Post
    Here's a test point pic of my 03 MSX150...
    Australia is so different

    I though all Weber engined Polaris PWC (MSX 110 and MSX 150) were 2004 model year units. Did Polaris actually sell any 2003 model year MSX 150 in the USA, or just in the southern hemisphere?

  9. #9
    Kosh's Avatar
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    I purchased this one of Polaris Australia, US PLE29876F304 I believe this HIN means it is really an 04?

    I was told it was the first to arrive and used as a demo to the dealers, even shipped of to Japan for a while where it blew a head gasket (due to original ECM map that was changed for production) I guess it was set up to impress.
    The ride plate is a 2003 model cut and modified, it also has the rub rail split at the sides not at the rear.
    In the end (35 hours old) this one suffered the dreaded Nikasil plating failure and sat on the shelf until I scored it last year.

    I am in the middle of a Rotax conversion with it so it will never be the same again.

    Cheers

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Kosh View Post
    I purchased this one of Polaris Australia, US PLE29876F304 I believe this HIN means it is really an 04?...

    The ride plate is a 2003 model cut and modified, it also has the rub rail split at the sides not at the rear...

    I am in the middle of a Rotax conversion with it so it will never be the same again...
    The F3 means it was manufactured in June 2003, and the digits 04 mean it is a '2004' model.

    That said, production in June of 2003 would have been very early for a 2004 model (normally they would do PWC production during the Fall and Winter for the next spring selling season., so the side joint in the rub rails and the 2003 ride plate all point to it being a proto-2004, not quite a 'real' 2004. Things like the rear seat post adjustment may also be of 2003 design.

    Do keep us posted on the progress of the 4-Tec engine conversion. There haven't been very many of these so far, and the details and challenges are not only interesting to read about, but will be helpful for others who contemplate doing one in the future.

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