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  1. #1

    4502 RR ECU Question

    Does this ECU mate with the throttle body? Or can it be moved from ski to another without re-programming?


  2. #2
    xenonx's Avatar
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    This ECU does mate up with the throttle body. It can be re-flashed to mate up to another throttle body but at a cost. I don't know if you can just plug it into another ski and have it work correctly.

  3. #3
    Site Admin Green Hulk's Avatar
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    All RR ECU's marry the TB. Its worth mentioning that i have never had a problem moving a RR ECU from ski to ski though..... i have heard of it happening to others though. It's worth a shot!

  4. #4
    I am sorry, but I dont understand. If they marry to the TB then how do you move the ecu from ski to ski?

  5. #5
    Site Admin Green Hulk's Avatar
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    The ECU actually mates to the throttle position sensor. It records its location and stores it as a reference point in the ECU. The "theory" is that no two throttle body's have the exact same throttle position so that the ECU will not work when moved to another ski. Like i said, i have never had trouble moving the ECU from one ski to another so the throttle positions must have been pretty damn close.
    I have heard a couple of rare cases where it didn't work. You will know if it doesn't idle right

  6. #6
    Water4fire's Avatar
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    Well because most throttle bodys are set the same. Not much of a difference, so you can put it on anothere ski and have no problems, but there is a slight chance it will not work...



    To reset it to new for anothere ski is only $100 through PPG.

    So if you buy it used for $900 and pay the $100 for the reset, you are still less than the $1350


    .

  7. #7

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    Quote Originally Posted by idizzy View Post
    I am sorry, but I dont understand. If they marry to the TB then how do you move the ecu from ski to ski?
    As far as i know the one that i am selling in the board the (stock class) don't marry to the T/B and can be moved from one ski to another, my buddy Israel Padilla moved his (4502) from his yellow 04' RXP to his Green 05' RXP without a single issue

  8. #8
    Seems like it should be OK. Worse case senario is sending it out for reprogramming. Hopefully it will work.

  9. #9
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by GPR/STX-15F/RXT View Post
    As far as i know the one that i am selling in the board the (stock class) don't marry to the T/B
    ALL Rotax Racing ECUs marry the first TB it's powered up with, but like i mentioned there is a small risk of it not working properly on another ski.

  10. #10
    Quote Originally Posted by Green Hulk View Post
    ALL Rotax Racing ECUs marry the first TB it's powered up with, but like i mentioned there is a small risk of it not working properly on another ski.
    yep

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