Slide on Prop Protector for 1 1/4" shaft - 80 mm diameter blade.

1 1/4” BORE SLIDE-ON PROP PROTECTOR 3.15” (80mm) DIAMETER BLADE
 
Manufactured in one piece with a width of only 12mm, it is designed for installations where the gap between the propeller and the shaft bearing is small. A gap of 18mm is sufficient; this includes 6mm of space for water to circulate to the shaft bearing. It simply slides onto the shaft after the propeller has been removed and is secured with a set screw that locates into a small drill dimple made in the shaft.