Mercury Optimax Models 135, 150, Direct Fuel Injection., Page 393Get this manual
RIGHT HAND NON-RATCHETING
5Install cross pin retaining spring onto sliding clutch as follows: IMPORTANT: DO NOT over-stretch retaining spring when installing onto sliding clutch6Spirally wrap spring into groove on sliding clutch7Place gear housing in soft jaw vise with the driveshaft in vertical position8Coat cam pocket of cam follower with 2-4-C wTeflon Marine Lubricant9Place shift cam into cam pocket of cam follower with numbered side of cam facing up10With shift cam positioned as shown, insert propeller shaft thru forward gear until shaft bottoms out55095