Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 424Get this manual
BIGFOOT GEAR HOUSING
Special Tools
1Pinion Gear Localing Tool (91-12349A2)
2Bearing Inslallalion Tool (91-13945)
3Oil Seal Driver (91-13949)
4Bearing Race Tool (91-14308Al)