The Mercruiser II-TR, Bravo Two, Prop is a boat part manufactured by MerCruiser. It comes with a manufacturer part number of 48-77898A10 and has no warranty. The product is a complete sterndrive outdrive and is compatible with sterndrive motors and components. The prop is designed for use with specific Mercruiser models. 19 splines 5 1/4 gear housing.