Water Pump Removal And Installation; Removal - Mercury 40 Service Manual

Water Pump Removal and
Installation

Removal

1. Remove water pump assembly as shown
according to model size.
Reassembling Water Pump to Jet
Drive
NOTE: Replace water pump cover if thickness of
steel at discharge slots is 0.060 in. (1.524mm) or
less, or if groove(s) (other than impeller sealing
groove) in cover roof are more than 0.030 in.
(0.762mm) deep.
NOTE: Replace impeller if:
a. Impeller blades are cracked, torn or worn.
30 Hp
74
95
a - Screw
b - Water Pump Cover Assembly
c - Seal
d - Washer
e - Key
f - Washer
g - Gasket
h - Face Plate
i - Impeller
j - Water Tube Extension
k - Gasket
6D-18 - LOWER UNIT
j
c
a
7
b
d
i
e
f
g
h
k
b. Impeller is glazed or melted (caused by insuf-
ficient water supply.)
c. Rubber portion of impeller is not bonded to
impeller hub.
1. Install face plate, gasket(s) and impeller key.
IMPORTANT: If impeller being installed has been
previously used and vanes have taken a "set,"
DO NOT INSTALL THE IMPELLER WITH THE
VANES REVERSED FROM THEIR PREVIOUS
"SET" AS VANE BREAKAGE WILL OCCUR
SHORTLY AFTER UNIT IS RETURNED TO SER-
VICE.
2. Install impeller.
NOTE: Apply a light coat of 2-4-C w/Teflon to inside
of pump cover to ease installation of cover over im-
peller.
3. Install pump cover. Rotate drive shaft CLOCK-
WISE while pressing cover down over impeller.
4. Apply Loctite 271 to retaining screws (4) and
torque to 60 lb. in. (6.8 N·m).
e
45 Hp
c
95
a
d
f
a - Impeller
b - Key
c - Water Pump Cover Assembly
d - Gasket
e - Seal
f - Face Plate
g - Screw
Loctite "271" (92-809819)
7
Loctite "405" (Purchase Locally)
74
95 2-4-C w/Teflon (92-850736A1)
g
b
54258
90-852572R1 JANUARY 1998