2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 258Get this manual
Bracket unit
Recommended power trim and tilt fluid: ATF Dexron II 3Install the trim piston assembly into the trim cylinder, and then tighten the trim cylinder end screw to the specified torque
2Fill the pump housing with the recommended fluid to the correct level as shown
Recommended power trim and tilt fluid: ATF Dexron II 3Remove all of the air bubbles with syringe or suitable toolNOTE: Turn the joint with screwdriver, and then remove any air between the pump gear teeth4Install the new O-ring 2, power trim and tilt motor 3, and then tighten the bolts to the specified torque