The bearing turns just fine but its all rusted, the yoke and U joints are as well on the lower,
Ayuh,.... Just clean it all up real good with rags, 'n Grease everything up,....
If the rust is just on the outside of the parts,... it's an eyesore, that ya won't see anyways,....
If there's rust inside the parts, on the bearin' surfaces, it'll feel rough, 'n have to be replaced,....
Btw,.... The Lower is but a piece of an Outdrive,.... You took the Outdrive off to see where yer at,...
The Lower Unit is removed from the Upper case, to change the impeller,....