Yamaha 115-225 HP Outboards Service Manual, Page 191Get this manual
po_W_E_R_T_R_IM A_ND TI_LT U_NI_T 4) Connect the leads to battery to check the fluid discharge pressure during downoperationTrim and tilt down Green (+) Blue- )
The motor should be operated within three seconds after trim and tilt down-operation
At the end of down-operation Pressures specification At the end of down operation: A: 4155 kgcm (583782 psi) B: -11 kgcm (85 -157 psi)
5) Remove the fluid pressure gauge
When the fluid pressure gauge has been removed, be sure to turn the manual valve toward the power trim side until it stops