CLOSED COOLING
SERVICE MANUAL NUMBER 30
Installation
1.
2.
3.
4.
5.
6.
7.
Align water pump bypass and inlet hoses with crossover.
Install crossover onto engine.
Align gaskets and fasten with retained bolts. Torque to 37 ft-lb. (50 Nm).
Install harness connections to water temperature sender and sensor.
Install reservoir hose to crossover. Tighten all hose clamps securely.
Install thermostat and thermostat retainer.
Carefully install heat exchanger to crossover.
IMPORTANT: Do not overtighten heat exchanger retaining strap. The 2 holding slots
will weaken under excessive pressure.
8.
9.
Install heat exchanger retaining strap. Tighten securely.
Refill closed cooling system.
CAUTION
Avoid seawater pickup pump impeller damage. DO NOT operate engine without
cooling water being supplied to seawater pickup pump.
10.
Start engine and check for leaks.
Changing Coolant
NOTICE
For information and procedures on draining the Seawater Section of Closed Cool-
ing (Coolant) Models refer to SECTION 1B. For cold weather or extended storage,
refer to SECTION 1B.
IMPORTANT: Closed cooling section must be kept filled year–round with recom-
mended coolant.
Coolant Recommendations
CAUTION
Propylene glycol, alcohol or Methanol based antifreeze or plain water are not rec-
ommended for use in fresh water section of cooling system at any time.
NOTE: All factory installed closed cooling systems come filled with Extended Life 5/100
Coolant. This antifreeze requires draining and replacing every five years or 1000 hour of
operation, whichever comes first. The color of this antifreeze is orange. For best results any
“top-off” fluid used should be Extended Life 5/100 Coolant. If Extended Life 5/100 Coolant
is unavailable, any type of ethylene glycol based antifreeze may be used, but it will require
replacement of the coolant every two years or 400 hours of operation, whichever comes
first.
In areas where the possibility of freezing DOES NOT exist, it is permissible to use a solution
of rust inhibitor and water (mixed to manufacturer’s recommendations).
INDEX
Page 6A-14
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)
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