CLOSED COOLING
SERVICE MANUAL NUMBER 30
b. Open thermostat valve and insert thread. Position thermostat on nylon string so that
it will be just below water level when suspended, then allow valve to close. Suspend
thermostat in water.
b
a
c
72675
a - Thermometer
b - Nylon String
c - Thermostat (Typical)
c. Place thermometer in container and position so that bottom of thermometer is even
with bottom of thermostat. Do not allow thermometer to touch container.
IMPORTANT: Water must be agitated thoroughly to obtain accurate results in steps
d. and e.
d. Plug in tester and observe temperature at which thermostat opens (thermostat
drops off thread).
e. Unplug tester and allow water to cool to a temperature 10°F (5°C) below specified
temperature on thermostat. Thermostat must be completely closed at this tempera-
ture.
5.
1.
Replace a thermostat that fails to meet all of the preceding tests.
Installation
Install a new O-ring and thermostat into crossover. Ensure thermostat seats in groove
of crossover.
2.
3.
4.
5.
Install thermostat retainer with 2 bolts and washers. Do not tighten.
Install heat exchanger.
Torque thermostat retainer fittings to 12 ft-lb. (16 Nm).
Refill closed cooling system.
CAUTION
Avoid seawater pickup pump impeller damage. DO NOT operate engine without
cooling water being supplied to seawater pickup pump.
6.
Start engine and check for leaks.
INDEX
Page 6A-12
90-863161 SEPTEMBER 2000
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 496 CID |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser 496 CID 8.1L Gasoline Marine Engines Service Manual Number 30 4.0 out of 4.0 based on 2 product reviews. How many openings for crankcaseventilation is there on
Merc 496 HO ?
Great down load . it was all there an more