Replacing Boat Prop Why Does Grease Leak Between The Prop And The Foot On My 1977 Johnson 75 Stinger Outboard?

Why does grease leak between the prop and the foot on my 1977 Johnson 75 Stinger Outboard? - replacing boat prop

I bought a 1977 Johnson 75HP Stinger a kind and is set for about 3 years outdoors on an old ship. It starts and runs well. The works well in front and back. Water hose I have him in the yard, and that the leakage of grease. Is there a label, if I replace the propeller, or to take what? Thanks