I'm in the process of replacing the old Volvo MD7A with a new Beta 20 sail drive unit with Gori folding prop. With a 14 x 8 prop (standard for the unit) I am told that I will be attaining 6 knots at 3,000 rpm. Max cruise for the Beta 20 is 3,600 rpm. So far the old engine is out, now time to clean and glass. I'm also stripping the bottom to repair blisters. It's going to be a busy winter!
1978 Islander Bahama