Flushing The Cooling System - Mercury 200 Verado FourStroke Operation And Maintenance Manual

• Inspect the engine motor mounts—dealer item
600 HOURS
• Check the valve lash—dealer item

Flushing the Cooling System

Flush the internal water passages of the outboard with fresh water after each
use in salt, polluted, or muddy water. This will help prevent a buildup of
deposits from clogging the internal water passages.
NOTE: The outboard can be tilted or in the vertical operating position during
flushing.
1. With the engine turned off, place the outboard in either the operating
position (vertical) or in a tilted position.
2. Disconnect the flush connector from the fitting on the bottom cowl.
3. Thread a water hose into the flush fitting.
4. Turn on the water tap (1/2 maximum) and let the water flush through the
cooling system for about 15 minutes.
5. When flushing is complete, turn off water and disconnect the water hose.
6. Install the flushing connector to the fitting on the bottom cowl. Tighten the
connector securely.
MAINTENANCE
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