Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 421Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 421

NON-BIGFOOT GEAR HOUSING
bIf boat pulls to the left, adjust trailing edge of trim tab to the leftIf boat pulls to the right, adjust trailing edge of trim tab to the right