Is your From what the manual says , the "lower driveshaft bearing" doesn't need to be shimmed, assembly grease for the bearings.
The following link is for assembly grease.
The upper bearing (bottom of the crank)you'll need to take the motor pretty much apart to get it out, the bearing has a locating pin and won't come out unless the cases(block) are split.
Marine grease for the splines.