Mercury 150 EFI Service Manual page 516

3. Install divider block if removed. Use RTV Sealer to seal seams between divider block
and gear housing.
4. Install a new water pump base gasket and install water pump base.
a
a
a -
b -
c -
d -
5. Install the following in order: Pump base to face plate gasket, face plate gasket and
face plate to pump cover gasket. Gaskets and face plate are indexed by dowel pin
location and must be installed correctly.
a -
b -
c -
6. Place impeller drive key on flat of driveshaft. Hold key on driveshaft with a small
amount of Quicksilver 2-4-C with Teflon Marine Lubricant.
IMPORTANT: When completing gear housing repair, that requires removal of water
pump impeller, it is recommended that the impeller be replaced. If it is necessary,
however, to reuse the impeller, DO NOT install in reverse to original rotation, or pre-
mature impeller failure will occur. Original rotation is clockwise.
A visual inspection of impeller drive key MUST BE made to determine that drive
key is on flat of driveshaft after impeller is installed. If key has moved off flat of
driveshaft, repeat Steps 6 and 7.
90-883728 JULY 2001
Divider Block
Water Pump Base
Gasket
Hole (MUST be positioned as shown)
b
b
Gasket (Water Pump Base to Face Plate)
Face Plate
Gasket (Face Plate to Water Pump Cover)
a
b
51870
c
c
a
a
51868
CAUTION
RIGHT HAND NON-RATCHETING
d
c
b
51866
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