Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 471Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 471

BIGFOOT GEAR HOUSING
DETERMINING FORWARD GEAR BACKLASH

NOTE: Read entire procedure before attempting any change in shim thickness1Obtain correct pinion gear depth; refer to Pinion Gear Depth," precedingPinion 2Install Bearing Preload Tool (91-14311A2) on drive shaft; refer to Gear Depth: preceding