Yamaha 115-225 HP Outboards Service Manual, Page 186Get this manual
po_W_E_R_T_R_IM_A_N_D_T_IL_T_U_N_'T K530000
INSPECTION Tiltrod and trimrod 1) Clean these components using soft brush and solvent, and inspect them carefullyIf there are light scratches on the surfaces, these may be polished off using fine wet or-dry sandpaper (440600 grit), but if there is excessives scratching, replace the components2) Clean all the parts thoroughly using soft brush and solvent, and dry them with compressed air3) Inspect the tilt-cylinder and pump-unit, and replace them if they are badly corroded
K540050