Hi all, I've never yet had to deal in prop choice until now.
Done a bunch of research, and just got my new to me engine out for a test last night. 2002 90hp carb'd Merc 4 stroke. Pushing a '64 17.5' Glasspar Seafair Sedan.
Currently has a 13" x 19"P alum. prop. Couldn't get over about 4400...