Anyone know what size and pitch propeller is used on the R-25? (Yanmar 110 HP). Stamped on the forward end of the hub is "1-888-661-ACME" which is just the phone number of ACME propeller company. Probably on the other end of the hub, under the prop nut, is stamped the size and pitch but I can't see it without removing the nut. The prop measures about 17 inches in diameter but it's hard to measure accurately with a tape measure. It is three blades with right hand rotation. Some info says 4 blade props were used too?? Inquiring minds want to know . . .