2005 SO Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 210Get this manual
GEARCASE ASSEMBLY Insert the return spring into propeller shaftDepress the return spring and slide the dog pin into both clutch dog and propeller shaft
Forward Gear
Apply gear oil to the forward gearPlace the backup shim in position and install the gear in the gearcase
1Return spring 2Clutch dog 3Pin
Install clutch dog spring, ensuring that it fits snugly into groove on shifter
Pinion Gear and Driveshaft
Apply gear oil to the thrust bearing and pinion gear