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If it's a Tecumseh, your fuel mix would be 24:1. There were a lot of augers made in the 70's that were marketed under different names. If you can post a picture, it would probably help. I had an 3hp "Ice King" auger that was basically a Jiffy painted another color. Depending on the blade and rotation you may be able to use a Jiffy or Strikemaster blade. If I saw a pic I could tell you for sure.Bob