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#255086
boscovius
Participant

    Not sure if this info applies to your 25 hp.  But here goes.

    When I upgraded my 57 Big Twin 35 to a 12 volt starter I was having fits trying to figure out why it didn’t fit.  Turned out that my bracket, Part Number 203572, was for the 6 volt starter.  With the help of the guys here I soon learned that I needed the larger diameter bracket Part Number 203944.  That one bolted right up to the new 12 volt Arco 5376.  I did have to transfer the part with the rubber bushing to the new bracket.

    https://www.ebay.com/itm/334296511822?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5337467797&toolid=10001&customid=

    Hope this helps.