+3 photos Force Mercury Prop 13" X 19P P686-4 Propeller Saturday, May 20, 10:31 PM - Boating: Accessories and Parts For sale is a Prop removed from a 1989 Force 85hp. It is 13" diameter and 19 pitch. It has 15 splines. Part numbers P686-4. It is great condition. 35149 Sycamore $150