Yamaha F40B - Lower Unit

67C3K11
LOWR
1
2
3
4
5
6
7
8
9
Lower unit
Lower unit.......................................................................................................6-1
Removing the lower unit ............................................................................6-4
Removing the water pump.........................................................................6-5
Checking the water pump..........................................................................6-5
Propeller shaft housing.................................................................................6-6
Removing the propeller shaft housing assembly.......................................6-7
Disassembling the propeller shaft assembly .............................................6-7
Disassembling the propeller shaft housing assembly................................6-7
Checking the propeller shaft housing ........................................................6-8
Checking the propeller shaft......................................................................6-8
Assembling the propeller shaft assembly ..................................................6-8
Assembling the propeller shaft housing assembly ....................................6-9
Drive shaft and lower case..........................................................................6-11
Removing the drive shaft, oil seal housing, and shift rod ........................6-13
Disassembling the oil seal housing .........................................................6-13
Disassembling the forward gear ..............................................................6-13
Disassembling the lower case .................................................................6-14
Checking the pinion and forward gear.....................................................6-14
Checking the bearing...............................................................................6-14
Checking the drive shaft ..........................................................................6-14
Checking the shift rod..............................................................................6-15
Checking the lower case .........................................................................6-15
Assembling the lower case......................................................................6-15
Assembling the forward gear...................................................................6-16
Assembling the oil seal housing ..............................................................6-16
Assembling the drive shaft ......................................................................6-16
Installing the shift rod, oil seal housing, and drive shaft ..........................6-17
Installing the propeller shaft housing assembly.......................................6-17
Installing the water pump.........................................................................6-18
Installing the lower unit ............................................................................6-19
Shimming......................................................................................................6-21
Shimming.................................................................................................6-22
Selecting the pinion shim.........................................................................6-22
Selecting the forward gear shim ..............................................................6-23
Selecting the reverse gear shim ..............................................................6-24
Backlash .......................................................................................................6-26
Measuring the forward and reverse gear backlash .................................6-26