2007-2009 Yamaha F15/F20 Outboard Service Manual, Page 179Get this manual
ShimmingBacklash Backlash indicator rod: YB-06265 Backlash adjustment plate: YB-07003 Dial indicator gauge: YU-03097 Magnetic base stand: YU-A8438
8Slowly turn the drive shaft clockwise and counterclockwise and measure the backlash when the drive shaft stops in each directionNOTE: Pull the drive shaft downward, and then turn it Measure the backlash at points to find the averageForward gear backlash: 0.180.87 mm (0.00710.0343 in) 9Adjust the current shim thickness if the forward gear backlash is out of specificationForward gear backlash Shim thickness
S6AG6750
Universal puller 1: YB-06117 Bearing housing puller 2: YB-06234 Center bolt 3: Nm (0.2 kgfm, 1.5 ftlb)