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Mercury L4NA 90 - Page 126

Mercury L4NA 90
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Tube Ref
No.
Description Where Used Part No.
87
High Performance
Gear Lubricant
Gearcase 92-858064K01
Draining Gearcase
1. Place the outboard in a vertical operating position.
2.
Remove the propeller. Refer to Propeller Replacement.
3. Place a pan below the gear housing to capture the lubricant.
4. Remove the lubricant level plug and fill/drain plug. Allow a sufficient
amount of time for the gearcase to drain. Depending on the ambient air
temperature, it may take 30 minutes for the gearcase to completely drain.
a - Lubricant level plug
b - Fill/drain plug
Filling the Gearcase
1. After the gearcase has been drained, fill the gearcase through the fill/drain
hole.
2. Add 500 mL (17 oz) of the specified gear lubricant.
IMPORTANT: Replace the sealing washers if damaged.
3. Allow a few minutes for the lubricant level to stabilize in the gearcase
before installing the lubricant level plug. Install the lubricant level plug.
4. Remove the tube and install the fill/drain plug.
5. Tighten the plugs to the specified torque.
Description
Nm lb‑in. lb‑ft
Plugs 22.6 16.6
Checking Lubricant Level
1. Place the outboard in a vertical operating position. Allow up to 30 minutes
for the lubricant level to stabilize in the gear housing.
57129
a
b
MAINTENANCE
116 eng

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