Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 468Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 468

BIGFOOT GEAR HOUSING
Pinion Gear Depth and Forward Gear Backlash
DETERMINING PINION GEAR DEPTH NOTE: Read entire procedure before attempting any change in shim thicknessIMPORTANT: Forward gear assembly must be installed in gear housing when checking pinion gear depth or an Inaccurate measurement will be obtained1Clean the gear housing bearing carrier shoulder and diameter2With gear housing positioned up right (drive shaft vertical), install Bearing Preload Tool (91-143 11 A2) over drive shaft in sequence shown
aAdaptor: Bearing surfaces clean and free of nicksThrust Bearing: Oiled and able to move freelyThrust Washer: Clean and free of nicks and bendsSpring

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