from mudbuddy:
Drive Lubrication: After 1 year or 50 hours we would like you to grease the lower drive. Remove the grease hole plug, located on the side of the casting near the drive tube. Insert a 1/4" X 28 pitch thread grease fitting. Lube 8 to 10 pumps (no more) of marine grade grease (available at parts store, commonly called marine trailer axle grease). Replace the cap head screw, do not over tighten. Warning: Don't over-grease the drive, in that the drive is sealed and the pressure will cause seal damage and drive failure. Check again at 200 hours or two years.
Hope this helps, don't blow the seals out
