yeah it will but putting a small hp lawn mower on a 70hp lower unit wil be slow and the gear ratio for the lower unit will prob be to much for a small motor. if you had a 9-25horse lower unit it would work better. have seen people do it before and know a guy who put a 27horse kohler on a old 35 evinrude lower unit and got around 25 mph out of it.
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