Re: Islander 28 propeller location from shaft support?
Don't remember a damned thing except it was a Martec 2-blade folding prop, and unless memory fails me, we had room for two good sized zincs on the shaft in between the prop and the prop strut, making it maybe 5? 6? inches from the strut to the back of the prop.
If nobody turns up with an answer, try looking at some of the PHRF fleets in the midwest or northeast, you may be able to contact another I28 owner directly that way.