Mariner Mercury 105/140 JET, Service Manual

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6B-56 - LOWER UNIT 90-824052R3 JUNE 2002
4. Install a new water pump base gasket and install
water pump base.
c
a
b
51866
a - Water Pump Base
b - Gasket
c - Hole (MUST be positioned as shown)
5. Install the following in order: Pump base to face
plate gasket, face plate to pump cover gasket.
Gaskets and face plate are indexed by dowel pin
location and must be installed correctly.
b
c
a
51868
a - Gasket (Water Pump Base to Face Plate)
b - Face Plate
c - Gasket (Face Plate to Water Pump Cover)
6. Place impeller drive key on flat of driveshaft.
Hold key on driveshaft with a small amount of
Quicksilver 2-4-C w/Teflon Marine Lubricant
(92-90018A12).
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 to reuse the impeller,
DO NOT install in reverse to original rotation or
premature impeller failure will occur. Original
rotation is clockwise.
CAUTION
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.
7. Slide impeller down driveshaft to impeller drive
key. Align drive key with key way in the center hub
of impeller, and slide impeller over drive key.
8. If removed, install new water pump insert into
pump cover as follows:
a. Apply Quicksilver Perfect Seal to water pump
insert area of pump cover.
b. Install water pump insert into pump cover,
being sure that tab on insert enters recess in
pump cover.
c. Wipe any excess Quicksilver Perfect Seal
from insert and cover.
NOTE: If 2 holes were drilled in top of water pump
cover to aid in removal of insert, fill holes with RTV
Sealer or equivalent. Allow to cure 24 hours prior to
operating engine.
9. Install water tube seal into pump cover. Plastic
side of seal goes into cover first.
10. Reinstall water tube guide into water pump cover.
11. Apply a light coat of Quicksilver 2-4-C w/Teflon
Marine Lubricant to inside of water pump insert.
12. Position assembled water pump cover over
driveshaft and lower over water pump studs.
Rotate driveshaft in a clockwise direction (viewed
from top), while pushing down on pump cover to
ease impeller entry into cover.
13. Install water pump cover retainer washers, nuts
and bolt.
CAUTION
DO NOT over-torque nuts and bolt, as this could
cause cover to crack during operation.
14. Torque water pump nuts to 50 Ib. in. (5.5 N·m),
and water pump bolt to 35 Ib. in. (4.0 N·m).