2009 Yamaha F40 Outboard Service Manual, Page 268Get this manual
Shimming Forward gear shim thickness (T1) measurement in places Number of shim(s) 0.10 0.12 0.15 0.18 0.30 0.40 0.50 Total Reverse gear shim thickness (T2) measurement in places Number of shim(s) 0.10 0.12 0.15 0.18 0.30 0.40 0.50 Total (mm) Subtotal (mm) Subtotal