Currently own a 1998 FORCE Mercury Marine 50HP Outboard (2 stroke) Motor. I recently have purchased a SELCO FORCE 1984-99 Repair Manual, in order to understand how to give the lower unit a lube before placing in water this spring. However, book's outboard motor maintenance section, doesn't add up. Just trying to figure out if I should have invested in a Mercury manual? New to the boating world. Thanks anyone.