2009 Yamaha F40 Outboard Service Manual, Page 228Get this manual
Exhaust cover
Oil filter wrench b: (commercially available) 2Remove the oil filter union bolt cWater temperature 5862 (136144 F) above 70 (158 F) Valve opening starts opening 3.0 mm (0.12 in) or above
Installing the oil filter1Install the oil filter union bolt a, and then tighten it to the specified torque