c. Place thermometer in container and position
so that bottom of thermometer is even with
bottom of thermostat. Do not allow thermom-
eter to touch container.
warning temperature switch may not work prop-
erly.
4.
Install thermostat, as previously shown, into ther-
mostat housing.
IMPORTANT: When performing instructions “d”
and “e,” water must be agitated thoroughly to ob-
tain accurate results.
5.
Position gasket on thermostat housing and rein-
stall thermostat cover. Torque bolts to 30 lb. ft.
(41
N·m).
d. Plug in tester and observe temperature at
whichthermostatopens(thermostatdropsoff
thread).
a
e. Unplug tester and allow water to cool to a
temperature 10°F (5°C) below specified tem-
perature on thermostat. Thermostat must be
completely closed at this temperature.
b
c
f.
Replace a thermostat that fails to meet all of
the preceding tests.
d
e
Installation
f
g
h
72674
71801
i
a
a
72719
MCM Model Shown - MIE Models Not Equipped
with Lifting Eye
1
2
- Brass Thermostat
- Stainless Steel Thermostat
a - Bolts
b - Lockwashers
a - Install Thermostat with This End Toward Thermostat Hous-
ing
c - Lifting Eye (MCM Models Only)
d - Hex Head Bleeder
e - Cover
f - Gasket
g - Thermostat (Typical)
h - Housing
!
CAUTION
Do not operate engine without cooling water be-
ing supplied to the seawater pickup pump, or
pump impeller will be damaged.
i - Gasket With Continuity Rivets
6.
Connect hoses to thermostat cover. Tighten hose
clamps securely.
1.
2.
3.
Remove thermostat housing and gaskets. Dis-
card gaskets.
Clean gasket surfaces on thermostat cover, ther-
mostat housing and intake manifold.
! CAUTION
Avoid seawater pickup pump impeller damage.
DO NOT operate engine without cooling water
being supplied to seawater pickup pump.
Position lower gasket (with continuity rivets) on
intake manifold. Place thermostat housing on
gasket.
7.
With boat in the water and/or cooling water prop-
erly supplied to seawater pickup pump, start en-
gine and inspect for leaks.
IMPORTANT: If gasket has continuity rivets, do
not coat with Quicksilver Perfect Seal, or audio
Index
90-823324--2 796
CLOSED COOLING SYSTEMS - 6B-9
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you