Section 6 - Storage
90-864195070 JUNE 2007 Page 127
2. Remove the blue drain plug from the distribution housing (lower front, port side).
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a - Blue drain plug
3. To properly vent the cooling system, remove the blue drain plug from the side of the
thermostat housing within 30 seconds.
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a - Blue drain plug location
4. Remove the two blue drain plugs from the seawater pickup pump (front, starboard side).
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a - Blue drain plugs
5. Verify that water is draining from each opening.
6. Allow the system to drain for a minimum of five minutes. Mercury MerCruiser
recommends leaving the drain system open while transporting the boat or while
performing other maintenance to ensure that all water is drained.
7. Crank the engine over slightly with starter motor to purge any water trapped in the
seawater pickup pump. Do not allow the engine to start.
8. Prior to launching the boat or starting the engine, close the drain system by installing
the four blue drain plugs.
9. Open the seacock, if equipped, or unplug and reconnect the water inlet hose prior to
operating the engine.
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