Section 5 - Maintenance
Page 78 90-864195070 JUNE 2007
5. All Other Models: Place the sterndrive unit in full trim limit out position, remove the oil
fill/drain screw and sealing washer and drain the oil.
b
a
mc79507-1
a - Oil fill/drain screw b - Sealing washer
6. Remove the oil vent screw and sealing washer. Allow the oil to drain completely.
mc77106-1
b
a
a - Oil vent screw b - Sealing washer
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. Description Where Used Part No.
87
High Performance Gear
Lubricant
Sterndrive unit 92-858064K01
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.
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