2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 157Get this manual
Cylinder block 20Install the oil filter, and then tighten it to the specified torque using 72.5 mm (2.9 in) oil filter wrench4Check the thermostat valve opening at the specified water temperaturesReplace if out of specification
Water temperature 60 (140 F) Oil filter: 18 Nm (1.8 kgfm, 13 ftlb) above 70 (158 F)Valve lift mm (0 in) (valve begins to lift) more than 4.3 mm (0.17 in)
Checking the thermostat
1Remove the cover and thermostat 2
5Install the thermostat and cover
Installing the power unit