Mercury GO BOLDLY SeaPro 500hp Operation And Maintenance Manual page 112

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DRAINING AND FILLING THE GEARCASE USING GEARCASE
SCREWS—METHOD 2
Draining the Gearcase
1. Trim the engine out to approximately 30 degrees.
2. Place a pan below the gearcase to capture the lubricant.
3. Remove the lower gearcase drain screw. Ensure that the gasket comes
off with the screw and is not stuck in the housing.
4. Remove the top gearcase vent screw. Ensure that the gasket comes off
with the screw and is not stuck in the housing.
5. 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
a -
Gearcase vent screw and gasket
b -
Gearcase drain screw and gasket
Filling the Gearcase
1. After the gearcase has been drained, ensure that the gearcase drain and
vent screws are removed.
2. Install the lubrication fill connection to the lower gearcase drain port.
3. Pump the specified gear lubricant into the gearcase until it comes out of
the top gearcase vent hole.
Description
High Performance Gear
Lubricant
MAINTENANCE
b
Where Used
Gearcase
102
72099
Part No.
92-858064K01
eng

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