2001 Mercury Mariner 50-60HP Factory Service Manual, Page 495Get this manual
BIGFOOT GEAR HOUSING
Propeller Shaft Reassembly
1Install components into propeller shaft in sequence shown
NOTE: When installing the clutch make sure the ratcheting clutch teeth (angled) are toward forward gear and non-ratcheting (square on both sides)are toward reverse gear
Assembly Sequence -Spring -Guide Block -Clutch -3 Metal Balls -Cam Follower -Forward Clutch Teeth -Reverse Clutch Teeth 2Align the hole in the clutch with the hole in the guide block, install cross pin