Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 186Get this manual
GEAR HOUSING
6Remove bolts (a) with washe rs7Guide gear housing from drive shaft housing
Gear Housing Disassembly
Bearing Carrier
1Remove two bolts (a) that secures bearing carrier (b)
ACAUTION
Make sure to keep gear housing from falling when bearing carrier loosens2Clamp propeliershaft in soft jaw vise Use soft face mallet to strike gear housing approxi mately midway between antiventilation plate and bearing carrier cavity