SERVICE MANUAL NUMBER 23
CLOSED COOLED (FRESH WATER) MODELS
COOLING SYSTEM
Section 6B - Closed Cooled (Fresh Water) Models
Table of Contents
Torque Specifications . . . . . . . . . . . . . . . . . . 6B-2
Lubricants / Sealants / Adhesives . . . . . . . 6B-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 6B-2
Closed Cooling System Capacity . . . . . 6B-2
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . 6B-2
Pressure Cap Rating . . . . . . . . . . . . . . . . 6B-2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B-3
Maintaining Coolant Level . . . . . . . . . . . . . . 6B-3
Pressure Cap Maintenance . . . . . . . . . . . . . 6B-4
Seawater Pickup Pump Maintenance . . . . 6B-5
Heat Exchanger Repair . . . . . . . . . . . . . . . . 6B-5
Testing Closed Cooling System . . . . . . . . . 6B-5
Testing Coolant for Alkalinity . . . . . . . . . 6B-5
Pressure Testing System . . . . . . . . . . . . 6B-6
Testing for Cylinder Head Gasket
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . 6B-10
Removal . . . . . . . . . . . . . . . . . . . . . . . . . 6B-10
Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B-11
Installation . . . . . . . . . . . . . . . . . . . . . . . . 6B-12
Changing Coolant . . . . . . . . . . . . . . . . . . . . 6B-13
Closed Cooling Section . . . . . . . . . . . . . 6B-13
Coolant Recommendations . . . . . . . . . 6B-13
Change Intervals . . . . . . . . . . . . . . . . . . 6B-13
Draining Instructions . . . . . . . . . . . . . . . 6B-13
Cleaning System . . . . . . . . . . . . . . . . . . . . . 6B-14
Closed Cooling Section . . . . . . . . . . . . . 6B-14
Seawater Section . . . . . . . . . . . . . . . . . . 6B-15
Filling Closed Cooling Section . . . . . . . . . 6B-16
Auxiliary Hot Water Heater Installation . . 6B-18
Heat Exchanger Bracket Hardware . . . . . 6B-19
Heat Exchanger Hose Connections . . . . . 6B-20
Closed Cooling System Water Flow
Leak . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B-7
Testing Heat Exchanger . . . . . . . . . . . . . 6B-8
For Internal Leak . . . . . . . . . . . . . . . . . 6B-8
For Blockage . . . . . . . . . . . . . . . . . . . . 6B-8
Testing Pressure Cap . . . . . . . . . . . . . . . 6B-8
6
B
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 6B-21
MCM / MIE Models . . . . . . . . . . . . . . . . 6B-21
Draining Diagram
(Coolant Section of System) . . . . . . . . . . 6B-22
90-861326--1
MARCH 1999
Page 6B-1
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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