Mercury MERCRUISER, Service Manual, Page: 39 / 566

3. Replace the cap.
Changing
1. Remove the gear lube monitor cap.
2. Bravo One models:
a. Remove the propeller.
b. Position the sterndrive unit to the full down position.
c. Remove the oil fill and drain screw and sealing washer.
d. Drain the fluid into a suitable container.
a - Oil fill and drain screw
b - Sealing washer
3. All other models:
a. Place the sterndrive unit in full trim out position.
b. Remove the oil fill and drain screw and sealing washer.
c. Drain the fluid into a suitable container.
a - Oil fill and drain screw
b - Sealing washer
4. Remove the oil vent screw and sealing washer. Allow the fluid to drain completely.
a - Oil vent screw
b - Sealing washer
IMPORTANT: If any water drains from the unit, or if the fluid appears milky, the sterndrive unit is leaking. See your
authorized Mercury MerCruiser dealer.
5. Lower the sterndrive unit so the propeller shaft is level.
IMPORTANT: Use only Mercury/Quicksilver High Performance Gear Lubricant in the sterndrive unit.
6. Fill the sterndrive unit through the oil fill and drain hole with specified gear lubricant until an air‑free stream of lubricant
flows from the oil vent hole.
mc79506-1
a
b
a
b
19777
mc77106-1
b
a
Maintenance
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 1C-23