CLOSED COOLING
SERVICE MANUAL NUMBER 30
Assembly
1.
Apply Quicksilver Perfect Seal to both sides of new end plate gaskets, then reinstall end
plates using new gaskets and seal washers. (Be sure to install seal washers between
end plates and gaskets.) Torque bolts to 54 lb-in. (6 Nm).
CAUTION
Avoid seawater pickup pump impeller damage. DO NOT operate engine without
water being supplied to seawater pickup pump.
2.
With boat in the water and/or cooling water properly supplied to seawater pickup pump,
start engine and inspect for leaks.
Heat Exchanger Repair
IMPORTANT: Brazing shut a leaking tube is only a temporary solution. Braze with
BCUP 2 rod or silver solder. Care must be taken not to melt other joints during repair.
1.
To repair leaking tube, braze shut the ends of the leaking tube. Usually another tube will
start leaking after a short period of time causing a reduction in cooling capacity. Do NOT
close more than three tubes.
2.
Broken nipples and drains can be reattached to the heat exchanger by brazing.
Installation
1.
2.
Ensure that thermostat retainer screws are loose.
Align heat exchanger onto crossover. Be careful not to damage seal between heat
exchanger and crossover.
3.
4.
5.
6.
7.
8.
Firmly press heat exchanger into crossover fittings.
Tighten thermostat retainer fittings.
Install heat exchanger bracket around crossover and heat exchanger. Tighten securely.
Install hoses to the heat exchanger.
Install hose from coolant reservoir. Tighten hose clamps securely.
Fill closed cooling system.
INDEX
Page 6A-10
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 |
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| Document File Type | |
| Copyright | Attribution Non-commercial |
(2 votes, average: 4 out of 4)
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