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.
Tube Ref No.
Description Where Used Part No.
87
High Performance Gear Lubricant Sterndrive unit 92-858064K01
7. Install the oil vent screw and sealing washer.
8. Continue to pump gear lubricant into the drive through the oil fill and drain hole until gear lubricant appears in the gear lube
monitor.
9. Fill the monitor so that the oil level is in the operating range. Do not overfill.
10. Ensure that the rubber gasket is inside the cap and install. Do not overtighten.
NOTE: Oil capacities include the gear lube monitor.
Model
Capacity Fluid Type
Bravo One 2736 ml (92‑1/2 oz)
High Performance Gear Lubricant
Bravo Two 3209 ml (108‑1/2 oz)
Bravo Three (single seawater pickup) 2972 ml (100‑1/2 oz)
Bravo Three (dual seawater pickup) 2736 ml (92‑1/2 oz)
11. Remove the pump from the oil fill and drain hole. Quickly install the sealing washer and screw. Tighten securely.
12.
Install the propeller. Refer to Propellers.
13. Check the oil level after the first use.
IMPORTANT: Oil level in the gear lube monitor rises and falls during operation. Always check the oil level when the sterndrive
is cool and the engine is off.
a
b
19777
mc77106-1
b
a
Section 4 - Maintenance
Page 54 90-8M0128973 eng MAY 2017
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