Re: Propeller Cone
On the bigger motors, I think it's more cosmetic than functional. It might help a tiny bit with hydrodynamics, but I doubt it'd make any noticable difference if it was on or off. On the smaller ones...what eurolarva said. On Johnnyrudes the pin is a shear pin and the shaft is round. On the Chryslers, the shaft is splined and the pin just holds it on the shaft and the cone keeps it there.
