Section 5 - Maintenance
90-8M0069751 eng APRIL 2012 Page 55
IMPORTANT: If any water drained from the gear lube fill and drain hole, or if the oil appears milky, the sterndrive is leaking
and should be checked immediately by your Mercury Diesel authorized repair facility.
6. Lower the sterndrive so that the propeller shaft is level. Fill the sterndrive through the gear lube fill and drain hole, with the
specified gear lubricant until an air‑free stream of lubricant flows from gear lube vent hole.
Tube Ref No. Description Where Used Part No.
87
High Performance Gear
Lubricant
Sterndrive 92-858064K01
IMPORTANT: Use only Mercury/Quicksilver High Performance Gear Lubricant in sterndrive.
7. Install the gear lube vent screw and sealing washer.
8. Continue to pump gear lubricant into the drive through the gear lube fill and drain hose until the 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 overtighten.
a - Gear lube monitor
b - "OPERATING RANGE" line
NOTE:
Gear lube capacity includes gear lube monitor.
Model
Capacity Fluid Type
Alpha One 1892 ml (64 oz) High Performance Gear Lubricant
10. Remove the pump from the gear lube fill and drain hole. Quickly install the sealing washer and gear lube fill and drain
screw. Tighten the gear lube fill and drain screw to the specified torque.
Description
Nm lb–in. lb–ft
Gear lube fill and drain screw 6.8 60.0 5.0
11. Recheck the gear lube level after the first use.
IMPORTANT: Gear lube level in the gear lube monitor will rise and fall during sterndrive operation; always check the gear lube
level when the sterndrive is cool and the engine is shut down.
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