Mercury 305 CID - Cooling System

6B-0 - CLOSED COOLING MODELS 90-823225--1 1096
Table of Contents
Page
305/350 CID / 5.0L/5.7L 6B-1. . . . . . . . . . . . . . . .
Water Flow Diagrams 6B-2. . . . . . . . . . . . . . . . . . . . .
Engines With Coolant Flow Thru Exhaust
Manifolds (Excluding Gen +) 6B-2. . . . . . . . . . . .
Engines With Raw Water Flow Thru Exhaust
Manifolds 6B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description 6B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seawater Pickup Pump (If Equipped) 6B-4. . . . . . .
Maintenance 6B-4. . . . . . . . . . . . . . . . . . . . . . . . . .
Stern Drive Unit Seawater Pickup Pump 6B-4. .
Belt Driven Seawater Pickup Pump 6B-4. . . . . .
Closed Cooling Systems With Coolant Flow
Thru Exhaust Manifolds
(Excluding Engines With Serpentine Belt) 6B-17. .
Maintaining Coolant Level 6B-17. . . . . . . . . . . . .
Pressure Cap Maintenance 6B-17. . . . . . . . . . . . . . .
Heat Exchanger Repair 6B-18. . . . . . . . . . . . . . . . . .
Testing Closed Cooling System 6B-18. . . . . . . . . . .
Testing Coolant for Alkalinity 6B-18. . . . . . . . . . .
Pressure Testing System 6B-19. . . . . . . . . . . . . .
Testing for Cylinder Head Gasket Leak 6B-20. .
Testing Heat Exchanger 6B-20. . . . . . . . . . . . . . .
Testing Pressure Cap 6B-20. . . . . . . . . . . . . . . . .
Thermostat 6B-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 6B-21. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing 6B-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 6B-24. . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
Changing Coolant 6B-26. . . . . . . . . . . . . . . . . . . . . . .
Closed Cooling Section 6B-26. . . . . . . . . . . . . . . .
Coolant Recommendations 6B-26. . . . . . . . . . . .
Change Intervals 6B-26. . . . . . . . . . . . . . . . . . . . .
Draining Instructions 6B-27. . . . . . . . . . . . . . . . . .
Cleaning System 6B-27. . . . . . . . . . . . . . . . . . . . . . . .
Closed Cooling Section 6B-27. . . . . . . . . . . . . . . .
Seawater Section 6B-27. . . . . . . . . . . . . . . . . . . . .
Flushing Seawater Section of Closed
Cooling System 6B-28. . . . . . . . . . . . . . . . . . . . . . . .
Draining Seawater Section of Closed
Cooling System 6B-30. . . . . . . . . . . . . . . . . . . . . . . .
Draining Precautions 6B-30. . . . . . . . . . . . . . . . . .
Filling Closed Cooling Section 6B-32. . . . . . . . . . . .
Closed Cooling System With Raw Water
Flow Thru Exhaust Manifold
(Engines With Serpentine Belt Only) 6B-33. . . . . .
Maintaining Closed Cooling System
Coolant 6B-33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Coolant for Alkalinity 6B-34. . . . . . . . .
Changing Coolant 6B-34. . . . . . . . . . . . . . . . . . . .
Pressure Cap Maintenance 6B-37. . . . . . . . . . . .
Flushing Seawater Section 6B-38. . . . . . . . . . . . .
Cleaning Seawater Section of Heat
Exchanger and Fluid Coolers 6B-39. . . . . . . . . .
Cleaning Closed Cooling Section 6B-40. . . . . . .
Cold Weather or Extended Storage 6B-41. . . . . . . .
Seawater Section Draining Instructions 6B-41. .
Serpentine Drive Belt Adjustment 6B-44. . . . . . .
Auxiliary Hot Water Heater Installation 6B-45. . . . .