Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 309Get this manual
4Assemble the cross pin through the sliding clutch, through the propeller shaft and through the shift spool shaft hole5 Install detent pin in third hole in clutch Propeller Shaft Assembly
Installation
1Lubricate the large thrust bearing with Quicksilver Gear Lubricant (92- 13783A24) and position first the thrust race then the bearing into the gear housing onto the reverse gear bearing adaptor
Propeller Shaft Sliding Clutch Cross Pin Reverse Gear Shift Spool Assembly Detent Pin
6Assemble the cross pin retaining spring over the propeller shaft and wind it around the clutch over the cross pin holeBe careful not to distort the spring while assembling itMake sure that the spring is wound on so that it does not cross over on Itself and that it lies flat against the clutch once It is assembledIf it does not lie flat against the clutch new spring must be installed