2. Install and tighten the pump mounting screws to the specified torque.
a - Pump mounting screws
Description Nm lb‑in. lb‑ft
Power‑assisted steering pump fasteners 17.6 155.7 –
3. Install the high‑pressure hose fitting and new O‑ring onto the steering pump assembly. Tighten the hose fitting to the
specified torque.
a - High‑pressure hose and fitting
b - Return hose
Description Nm lb‑in. lb‑ft
Power‑assisted steering hose fittings 31 – 23
4. Connect the return hose to the steering pump assembly and secure it with a hose clamp.
5.
Install the pulley. Refer to Power‑Assisted Steering Pump Pulley—Installation.
Replacing the Belt and Adjusting Tension
To replace the drive belt or to adjust the tension, refer to Serpentine Drive Belt in Section 1C.
Power‑Assisted Steering Fluid
Filling and Bleeding
IMPORTANT: Fill the power‑assisted steering system exactly as explained in the following procedure to ensure that all air is
bled from the system. Failure to remove the air may cause foam during operation and discharge from the pump reservoir.
Foamy fluid may cause the power‑assisted steering system to become spongy, resulting in poor boat control.
1. Using the steering wheel, position the sterndrive so that it is in the straight ahead position.
2. Stop the engine.
3. Remove the cap and dipstick from the power‑assisted steering pump.
4. Add approved fluid to bring the level up to the "FULL COLD" mark on the dipstick.
IMPORTANT: Use only Power Trim and Steering Fluid in the power‑assisted steering system.
Power-Assisted Steering Pump and Related Components
Page 8A-16 © 2016 Mercury Marine 90-8M0099748 eng DECEMBER 2015
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