2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 8Get this manual
Safety while working 6Keep supply of clean, lint-free cloths for wiping up spills, etc Disassembly and assembly
1Use compressed air to remove dust and dirt during disassembly2Apply engine oil to the contact surfaces of moving parts before assembly
Good working practices
Special service tools Use the recommended special service tools to protect parts from damageUse the right tool in the right mannerdo not improvise
Tightening torques Follow the tightening torque specifications provided throughout the manualWhen tightening nuts, bolts, and screws, tighten the large sizes first, and tighten fasteners starting in the center and moving outwardNon-reusable parts Always use new gaskets, seals, O-rings, cotter pins, circlips, etc when installing or assembling parts