6 - M
AINTENANCE
90-8M0077672 JUNE 2013
49
1
2
3
4
5
6
7
8
9
2. Fill the input shaft housing with fluid through the top pipe plug
hole "a" until oil flows from oil level pipe plug hole "b." Install
the pipe plugs "a" and "b" into the input shaft housing and
tighten securely.
a -
Fill pipe plug hole (fill through here)
b -
Oil level pipe plug hole
Tube Ref
No.
Description
Where Used
Part No.
SAE 85W-90
Mercury Racing
Gear Oil
Input shaft housing
8M0078015
A
LL
M
ODELS
1. Place the drive unit in a position so that the propeller shaft is
level.
2. Remove the upper oil level plug and sealing washer from the
gearcase.
7447
b
a
a -
Level propeller shaft centerline
b -
Fill/drain plug and sealing washer
c -
Oil level plug
IMPORTANT: If water drains from the gearcase, or if gear lubricant
appears milky; the drive unit is leaking. Have the unit checked
immediately by your authorized Mercury Marine dealer.
3. Remove the lower fill/drain plug and sealing washer from the
gearcase and allow the oil to drain into a suitable container.
4. Fill the drive unit with fluid through the lower fill/drain hole until
oil comes out of the top oil level plug opening.
5. Install the upper oil level plug and sealing washer.
6. Remove filler tube and quickly install the lower fill/drain plug
and sealing washer.
c
a
b
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