I own a 1986 O'day Day Sailler III. My 2 hp Honda 4 cycle motor was stolen from my garage after winterization. Bummed. I do not know what size shaft (15 or 20") that motor was. Been to two Outboard Motor stores with all demesions of my boat hoping they could assist with the size. Strange...they could not help. Any Oday Day Sailer folks know what size shaft motor I need> Thanks amcrapa@yahoo.com