2009 Yamaha F40 Outboard Service Manual, Page 244Get this manual
Shim location 8-28 Selecting the pinion shim (T3) 8-29 Pinion shim (T3) selection table 8-32 Measuring the forward gear backlash 8-34 Adjusting the forward gear shim thickness (T1) 8-34 Forward gear shim (T1) selection chart 8-36 Measuring the reverse gear backlash 8-37 Adjusting the reverse gear shim thickness (T2) 8-37 Reverse gear shim (T2) selection chart 8-39