Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-42794--1, Page 141Get this manual
Bearings BALLROLLER BEARINGS
Propeller Shaft
1Replace propeller shaft if any of the following conditions exist: aSplines are twisted or wornbOil seal surfaces are deeply groovedallowing water to enter gear housingcSliding clutch slot worn dBearing surface is pitted, worn, rustedor contain imbedded metal particles,',)
ACAUTION
DO NOT spin-dry ballroller bearings with compressed air1Clean bearing in solvent and dry with compressed air2Bearing should be free of rust stains3Attempt to work inner bearing race in-and-outThere should not be excessive play4Lubricate bearing with Quicksilver Gear LubeRotate inner bearing raceBearing should have smooth action If ball bearing sounds or feels rough or has catches, remove and discard bearingRefer to "Disassembly" preceding