2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 155Get this manual
Lower unit
Lower unit 6-1 Removing the lower unit 6-4 Removing the water pump6-5 Checking the water pump6-5 Propeller shaft housing 6-6 Removing the propeller shaft housing assembly6-7 Disassembling the propeller shaft assembly .6-7 Disassembling the propeller shaft housing assembly6-7 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.6-9 Drive shaft and lower case6-11 Removing the drive shaft, drive shaft housing, and shift rod6-12 Disassembling the drive shaft housing 6-12 Disassembling the forward gear 6-12 Disassembling the lower case .6-13 Checking the pinion and forward gear.6-13 Checking the bearing6-13 Checking the drive shaft 6-13 Checking the shift rod 6-13 Checking the lower case .6-13 Assembling the lower case 6-13 Assembling the forward gear6-14 Assembling the drive shaft housing6-15 Installing the shift rod, drive shaft housing, and drive shaft.6-15 Installing the propeller shaft housing .6-16 Installing the water pump.6-16 Installing the lower unit 6-17 Shimming 6-20 Shimming.6-21 Selecting the pinion shim.6-21 Selecting the forward gear shim 6-21 Selecting the reverse gear shim 6-22 Backlash 6-23 Measuring the forward and reverse gear backlash .6-23