2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 171Get this manual
Bracket unit NOTE: Adjust the trim sensor after installing the power trim and tilt unit2Assemble the clamp brackets and the swivel bracket by installing the anode 2, bolt 3, and self-locking nut 4, then tightening the nut to the specified torque
Removing the clamp brackets
1Remove the power trim and tilt unitFor removal procedure, see "Removing the power trim and tilt unit 2Remove the anode 13Disconnect the ground lead 24Remove the trim sensor cam screw 35Loosen the self-locking nut and the bolt 5, and then remove clamp brackets and 76Remove the trim sensor7Remove the tilt stop leverA A