Section 5 - Maintenance
Page 82
90-899883154 JANUARY 2008
6. Remove the oil vent screw and sealing washer. Allow the oil to drain completely.
mc77106-1
b
a
a -
Oil vent screw
b -
Sealing washer
IMPORTANT: If any water is drained from the oil fill/drain hole or if the oil appears milky,
the sterndrive unit is leaking. Contact your authorized Mercury MerCruiser dealer
immediately.
7. Lower the sterndrive unit so that the propeller shaft is level. Fill the sterndrive unit
through the oil fill/drain hole with specified gear lubricant until an air‑free stream of
lubricant flows from oil vent hole.
Tube Ref No.
Description
Where Used
Part No.
87
High Performance Gear
Lubricant
Sterndrive unit
92-858064K01
IMPORTANT: Use only Mercury/Quicksilver High Performance Gear Lubricant in
sterndrive unit.
8. Install the oil vent screw and sealing washer.
9. Continue to pump gear lubricant into the drive through the oil fill/drain hole until the
gear lubricant appears in the gear lube monitor.
NOTE: Oil capacity includes gear lube monitor.
10. Fill the monitor so that the oil level is in the operating range. Do not overfill.
Model
Capacity
Fluid Type
Bravo Three (Single seawater pickup)
2972 ml (100‑1/2 oz)
High performance gear lubricant
Bravo Three (Dual seawater pickup)
2736 ml (92‑1/2 oz)
11. Ensure that the rubber gasket is inside the cap and install. Do not overtighten.
12. Remove the pump from the oil fill/drain hole. Quickly install the sealing washer and oil
fill/drain screw. Tighten securely.
13. Install the propeller. Refer to
Propellers
.
14. Recheck the oil level after the first use.
IMPORTANT: The level of oil in the gear lube monitor will rise and fall during sterndrive
operation; always check the oil level when the sterndrive is cool and the engine is shut
down.
Power Trim Fluid
Checking
IMPORTANT: Check the oil level with the sterndrive unit in the full down/in position only.