3. 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.
4. Lower the sterndrive unit so that the propeller shaft is level. Fill the sterndrive unit through the oil fill and drain hole with the
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
IMPORTANT: Use only Mercury/Quicksilver High Performance Gear Lubricant in the sterndrive unit.
5. Install the oil vent screw and sealing washer.
6. Continue to pump gear lubricant into the drive through the oil fill and drain plug hole until the gear lubricant appears in the
gear lube monitor.
7. Fill the monitor so that the gear lube level is in the operating range. Do not overfill. Ensure that the rubber gasket is inside
the cap and install. Do not overtighten.
NOTE: Oil capacity includes the gear lube monitor.
Model
Capacity Fluid Type
Alpha One 1892 ml (64 oz)
High Performance Gear
Lubricant
8. Remove the pump from the oil fill and drain hole. Quickly install the sealing washer and oil fill and drain screw. Tighten
securely.
9. Check the oil level after the first use.
IMPORTANT: The gear lube level fluctuates during operation. Check when the engine is cold.
Bravo Sterndrive Gear Lube
Checking
NOTICE
Discharge of oil, coolant, or other engine/drive fluids into the environment is restricted by law. Use caution not to spill oil,
coolant, or other fluids into the environment when using or servicing your boat. Be aware of the local restrictions governing
the disposal or recycling of waste, and contain and dispose of fluids as required.
IMPORTANT: The gear lube level fluctuates during operation. Check before starting, when the engine is cold.
NOTE: The gear lube monitor bottle has a sensor in it that is connected to the engine warning system.
a
b
7161
Section 4 - Maintenance
Page 52 90-8M0128973 eng MAY 2017
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