Maintenance
7. If required, clean the closed cooling system. See Cleaning the Closed Cooling System. 8. Fill the system with the specified coolant. See Filling.
Cleaning the Closed Cooling System The closed cooling section of the cooling system should be cleaned at least once every two years or whenever decreased cooling efficiency is experienced. Use a high‑grade automotive cooling system cleaner to remove closed cooling system deposits. Follow the manufacturer's instructions. If the closed cooling section is extremely dirty, use a pressure flushing device to flush out any remaining deposits. Flushing should be done in the direction opposite normal coolant flow to allow water to get behind deposits and force them out. For proper hookup and flushing procedures refer to the instructions that accompany the flushing device.
Filling the Closed Cooling System 1. Remove the pressure cap.
a
b 23302
b - Coolant expansion tank
a - Pressure cap
IMPORTANT: Use only the specified coolant. 2. If the coolant is being replaced or the level is low, slowly add the specified coolant to the level indicated in the table. Coolant level in expansion tank All models
Within 25 mm (1 in.) of the bottom of the filler neck, or between the upper and lower marks, if marked
Tube Ref No. 123
Description
Where Used
Part No.
Marine Engine Coolant (Only available in Europe)
Closed cooling system
92-813054A2
Fleetguard Compleat with DCA4, Fleetguard Part Number CC2825
Closed cooling system
Obtain Locally
NOTICE Without sufficient cooling water, the engine, the water pump, and other components will overheat and suffer damage. Provide a sufficient supply of water to the water inlets during operation. 3. Ensure that the seawater pickup pump is supplied cooling water.
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CMD-4082040 / 90-866941 NOVEMBER 2007