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LR-503-4 Replacement Coming by End of Year!

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  • LR-503-4 Replacement Coming by End of Year!

    So HiPerCo and I have been working on reverse engineering the LR-503-x (LR503) start stop module that so commonly fails. I used a LR-503-4 in my teardown.

    I have completely disassembled the "magical" box, cataloged all the parts, created working LTSpice Simulations, and brought everything into Eagle.

    I will be testing the module with modern replacement components with a higher reliability factor and hopefully by the end of the summer will have a replacements made . . . semiconductor shortages aside for immediate sale. This will be a direct plugin replacement for all years that use a LR503 (two versions with different methods of connections).

    I know that K447 would like me to make a "universal" version, but at this time, I am concentrating on just the LR503. If I can get donor modules I will attempt to add the voltage regulator and other functions from the other modules to make a universal module. Just one step at a time.

    Just wanted to keep you all in the loop!


    Attached Files
    2002 Virage TXi 1200
    Update: Sold 2004 Virage i x2

    For Ficht EMM Repairs, contact Lakeside Tech

    Polaris PWC useful info

    2002 Virage TXi Complete Tear Down and Rebuild Complete!

  • #2
    I thought you posted you had a girl friend? She must have dumped you. You have far too much spare time.
    2*2004 MSX140
    1*2002 Virage i-sold
    7*2003 Virage I-sold
    4*2004 Virage I-sold
    1-2003 MSX140-sold
    2*2004 MSX150-sold
    1*2004 Virage I-salvage
    2*2003 MSX140-salvage


    • #3
      I don't have any skis that need an LR503 but this is awesome you are doing this.
      (2) 98 Pro 785 - 90 Superjet 650 (coffman exhaust, etc) - 95 750 SXI (R&D exhaust, ported, polished, etc)