Lower Unit
Section 6A - Gear Housing
(2.15:1)
Table of Contents
Gearcase Specifications.................................................... 6A-4
Gear Housing and Driveshaft
.............................................6A-6
Propeller Shaft................................................................... 6A-8
General Service Recommendations................................ 6A-10
Bearings....................................................................6A-10
Shims........................................................................6A-10
Seals.........................................................................6A-10
Draining and Inspecting Gear Housing Lubricant............ 6A-10
Gear Housing Removal....................................................6A-11
Gear Housing Disassembly............................................. 6A-12
Bearing Carrier Disassembly.................................... 6A-12
Propeller Shaft Disassembly.....................................6A-16
Water Pump, Driveshaft, and Shift Shaft Disassembly
.............................................................................. 6A-18
Driveshaft Removal.................................................. 6A-21
Forward Gear and Reverse Gear Inspection............6A-22
Driveshaft Pinion Bearing Removal.......................... 6A-24
Driveshaft Inspection................................................ 6A-25
Upper Driveshaft Bearing Inspection........................ 6A-26
Gear Housing Assembly.................................................. 6A-26
Pinion Bearing Installation........................................ 6A-26
Forward Gear Bearing Installation............................ 6A-27
Bearing Carrier Assembly.........................................6A-28
Water Pump Base Assembly.................................... 6A-30
Propeller Shaft Assembly......................................... 6A-31
Pinion Gear and Driveshaft Installation.................... 6A-32
Forward Gear Backlash............................................ 6A-33
Shift Shaft and Water Pump Base Installation..........6A-35
Water Pump Cover Assembly...................................6A-37
Propeller Shaft and Bearing Carrier Installation....... 6A-38
Gear Housing Installation......................................... 6A-39
Propeller Installation................................................. 6A-41
Gear Housing (2.15:1)
90-8M0125265 eng NOVEMBER 2017 © 2018 Mercury Marine Page 6A-1
6
A
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