3.
If thermostat is suspected of producing insuffi-
cient engine temperature, check thermostat for
leakage by holding it up to lighted background.
Light leakage around the thermostat valve indi-
cates that thermostat is not closing completely
and should be replaced. (A small amount of leak-
age at one or two points around the valve perime-
ter is acceptable.)
a
b
c
75083
d
a
MCM / MIE Models With Seawater Flow Through
Exhaust Manifolds
72717
a - Thermostat Housing
b - Thermostat
c - Gasket
Brass Thermostat Shown (Stainless Similar)
d - Thermostat Housing Cover
a - Check For Light Leakage Around Perimeter Of Valve
4.
Check opening and closing temperature of ther-
mostat (using a tester similar to the one shown),
as follows:
Testing
1.
Clean thermostat in soap and water to remove
any deposits or debris.
a. Fill tester to within 1 in. (25 mm) of top with tap
water. Do not use distilled water.
2.
Inspect thermostat for corrosion or other visible
damage.
b. Open thermostat valve and insert thread. Po-
sition thermostat on nylon string so that it will
be just below water level when suspended,
then allow valve to close. Suspend thermo-
stat in water.
b
a
b
a
72674
71801
c
c
72675
75083
a - Brass Thermostat
a - Thermometer
b - Stainless Steel Thermostat
b - Nylon String
c - Stainless Steel Thermostat With Disc
c - Thermostat (Typical)
Index
6B-8 - CLOSED COOLING SYSTEMS
90-823224--2 796
| 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.
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