A 61 year old Poulan that still runs?? Wow! Understandably, you would be facing a dead end trying to find an owners manual for that one (though you could try writing Poulan direct - it can't hurt), but back in 1950, the majority of two-stroke engines were still using a 16 to 1 gas/oil ratio. It will smoke like crazy, but you are guaranteed that is safe, at any rate.
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