Bought 1990 Champion 184 DCR with GT175 on it . It mounted on a 6" Rapid Jack, but I havent been able to get information on the stainless 4 blade prop. The only information I have found etched on the prop is Custom Prop by Spinelli Brog II Rochester NY 4191. Do I need to pull the prop to find the size and pitch? I also googled Spinelli and cant find any contact information. Need help!