Thank you for your replys

I have since put my boat onto the hard standing and have been working on her over winter. @tattersalad I have looked into the tohatsu 6hp sail drive and would like to purchase it, just having issues with working out if it would physically fit the boat as when they built these hurleys in the late 70s 4 stroke wasnt a thing. As far as my research has gone, new outboards are all mounted in a different way, they sit lower on the transom.
I have a outboard man coming this week to try and fit a 4strok onboard so will post results if it works or not.