J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment prop recommendations and gear ratio for yanmar?

Thinking about a new prop for J30 #456 1983. Yanmar 2GM
Existing Martec is very worn and I'm told it is also very inefficient. Looking for more push in a headwind so can maintain at least 5 knots. Still want folding prop as lots of pots in Penobscot Bay and still to sail fast.
[Need the gear ratio so I can get a quote from suppliers. Looking at Flex-Fold - any thoughts or recommendations?

Thanks!
Tom Hildreth
Kingfield ME