Power Trim Fluid; Checking - MerCruiser 4.3L TKS Sterndrive Owner's Manual

Section 5 - Maintenance
6. 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.
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.
High Performance Gear
87
Lubricant
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 gear lube monitor circuit until the gear lubricant appears in the gear lube monitor.
10. Fill the monitor so that the oil 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 gear lube monitor.
Model
Alpha One
Bravo One
Bravo Two
Bravo Three
11. Remove the pump from the oil fill/drain hole. Quickly install the sealing washer and oil fill/drain screw. Tighten securely.
12. Reinstall the propeller. Refer to Propellers.
13. Recheck the oil level after the first use.
IMPORTANT: Oil level in the gear lube monitor will rise and fall during sterndrive operation. Check the oil level only 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.
1. Place the sterndrive unit in full down/in position.
Page 52
mc77106-1
Description
Capacity
1892 mL (64 oz)
2736 mL (92‑1/2 oz)
3209 mL (108‑1/2 oz)
2972 mL (100‑1/2 oz)
a - Oil vent screw
b - Sealing washer
Where Used
Sterndrive unit
High Performance Gear Lubricant
90-8M0053265
Part No.
92-858064K01
Fluid Type
NOVEMBER 2010