Tohatsu 4 Stroke MFS 2/2.5/3.5A Outboards Service Manual, Page 127Get this manual
Lower Unit 20) Removing Drive Shaft
1Pull up drive shaft ass'y 1, remove pinion (B) gearand pull out forward (A) gear When removing forward (A) gear, be careful not to damage the existing shims or lose themShim is reusable Replace shim with new one of the same thickness if any deformation or damage is found on it
21) Disassembly of Drive Shaft
1Remove drive shaft bearing Before removing, check bearing for play or deflectionReplace if necessary Be sure to remove or install from bearing of pinion (B) gear sideCAUTION