Jack Innes Posted May 22, 2018 Share Posted May 22, 2018 I just found some numbers on my AC engine crank case. On the horizontal machined surface by the magneto there is BC12-36 ( the - is a #1 sideways.) On the vertical surface below the magneto 411A62 is stamped upside down then a long space then 33 right side up. Do any of these make sense to anyone? Thank you, Jack Quote Link to comment https://www.bigmacktrucks.com/topic/53402-mack-ac-engine-number/ Share on other sites More sharing options...
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