Per the Gori calculator that was used by AB
Marine, it is a 16.5" X 11" LH prop. It worked great with my 29HP
Volvo Model 2003 normally aspirated
engine. Sailing, it was worth about 3/4
knot in winds that would move me at 5 knots with my previous
2 blade fixed prop. Once installed I'd go 5 3/4 knots in the same conditions. If one is a
racer that makes a real difference (I'm not), but if one is a cruiser it makes a difference too. 3/4 of a
knot over the course of a day can get one to a harbor before as opposed to after night fall.