Mercury 350 MAG Manual page 97

4. Place the sterndrive unit in full trim out position, remove the oil fill and drain screw and sealing washer and drain the oil.
b
a
5. Remove the oil vent screw and sealing washer. Allow the oil to drain completely.
b
a
IMPORTANT: If any water drained from the oil fill/drain hole, or if the oil appears milky, the sterndrive unit is leaking and
should be checked immediately by your authorized Mercury MerCruiser dealer.
6. 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 oil vent hole.
Tube Ref No.
High Performance Gear
87
Lubricant
IMPORTANT: Use only Mercury/Quicksilver High Performance Gear Lubricant in sterndrive unit.
7. Install the oil vent screw and sealing washer.
8. Continue to pump gear lubricant into the drive through the oil fill and drain plug hole until gear lubricant appears in the gear
lube monitor.
9. 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 over tighten.
NOTE: Oil capacity includes the gear lube monitor.
Model
Alpha One
10. Remove the pump from the oil fill and drain hole. Quickly install the sealing washer and oil fill and drain screw. Tighten securely.
11. Recheck the oil level after the first use.
IMPORTANT: The gear lube level fluctuates during operation. Check when the engine is cold.
90-8M0050539 MAY 2011
eng
a - Oil fill and drain screw
b - Sealing washer
7160
7161
Description
a - Oil vent screw
b - Sealing washer
Where Used
Sterndrive unit
Capacity
1892 ml (64 oz)
Section 5 - Maintenance
Part No.
92-858064K01
Fluid Type
High Performance Gear
Lubricant
Page 89