2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 188Get this manual
Tilt cylinder and trim cylinder
Disassembling the trim cylinder
1Hold the power trim and tilt unit in vise using aluminum plates on both sides
NOTE: Place the tilt cylinder in the vise horizontally2Loosen the tilt cylinder end screw 2, and then remove it
2Loosen the trim cylinder end screw 2, and then remove it
WARNING
Make sure that the ram is fully extended before removing the end screw