Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 428Get this manual
3Locate and retain the thrust race and thrust bearing which could be on top of the reverse gear (if not, they may be stuck to the reverse gear bearing adaptor) PROPELLER SHAFT ASSEMBLYCOMPONENT DISASSEMBLY IMPORTANT: When accomplishing the next step, all of the parts are free to come apartWork closely over work bench to ensure that the parts are not dropped or damaged, and to avoid personal injury
1Remove the spring around the clutch being careful not to overstretch it during removalIf the spring does not coil back to its normal position once it has been removed, it must be replaced (ratcheting assembly shown)