Section 6 - Storage
90-864195070 JUNE 2007 Page 125
3. Immediately remove the blue drain plug from the side of the thermostat housing. This
must be removed within 30 seconds to properly vent the cooling system.
a
b
6136
a - Blue handle b - Blue drain plug location
4. Visually verify that water is draining. If water does not drain, remove the blue drain plug
from the distribution housing and drain manually.
a
b
6137
a - Drain location ‑ orange or red b - Blue drain plug
5. 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.
6. Reinstall the blue drain plug in the thermostat housing.
7. Close the drain system by rotating the blue handle clockwise until it stops and install
the blue drain plug, if removed. The handle is fully seated when no red is visible. Do
not overtighten the handle as this will create new threads.
8. Open the seacock (if equipped) or unplug and reconnect the water inlet hose prior to
operating the engine.
BOAT OUT OF THE WATER
1. Place the boat on a level surface to ensure complete draining of system.
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