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Mercury OptiMax 250 - Installing Powerhead

Mercury OptiMax 250
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INSTALLATION
Page 1D-28 90-888438 JUNE 2002
Installing Powerhead
1. Install gasket on drive housing cover. Ensure sealing bead is facing up towards drive
housing cover.
2. Install two (2) O-rings.
3. Check that slinger is on drive shaft.
4. Lubricate drive shaft splines with Special Lubricant 101.
a
b
c
d
59291
a-Gasket, with Sealing Bead Facing Up
b-Drive Housing Cover O-Ring
c-Drive Shaft O-Ring
d-Lubricate drive shaft splines with Special Lubricant 101
5. Lower powerhead on drive housing cover. Align drive shaft splines with crankshaft
splines, and powerhead mounting studs with adapter plate holes.
6. Secure powerhead to drive housing cover with twelve (12) M10 x1.5 nuts. Torque nuts
to 20 lb. ft. (27 Nm) following the torque sequence given. Repeat torque sequence,
torquing nuts to 35 lb. ft. (47 Nm).
FORWARD
2
1
3
4
5
6
7
8
9
10
11
12
a-M10 x 1.5 Nuts, Torque in two stages

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