Mercury Force 9.9, 15HP Outboards Service Manual, Page 180Get this manual

3 Install shift pin Make sure flat end (A) of shift pin is against clutch spring pin
4Reassemble front gear on propeller shaft Install th rust washer (A)front gear (6), propeller shaft bearing (C) and propeller shaft bearing race (0) on propeller shaft
IMPORTANT

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives