I just ordered a stainless steel prop from Deepblueyachtsupply. I was having some trouble identifying the one I needed for a 1998 Mercury Tracker, all that I found listed were either 10 or 15 spline, after removing I found I had a 13 spline. I finally identified my motor as a Force 75HP. I called Deep Blue on a Friday and the salesman helped me verify the prop I needed. I asked how long it would be before shipping as I needed it by June 15. He said they would ship the following Monday. I received my new prop on Tuesday. Great help, service, shipping, price, and product. Thanks Deep Blue.