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I had an ice king auger and yes they were from the 70's. If my memory serves me correct the mix was 24 to 1. If I have this correct the auger is green with a white engine. Be careful using it as I couldn't find replacement blades for mine. Good luck with it.
I got a ice king michigander ice auger.yup tecumseh 3hp at 40:1.same engine as a jiffy model 30 of same vintage.