Mercury MerCruiser Service Manual page 60

Maintenance
10. There are power packages that require specific drain plugs removed because the engine angle is greater than the air
actuated drain system allows for proper draining of the system. Remove the blue plugs shown in the following illustrations.
11. Allow the system to drain for a minimum of ten minutes. Pump air as necessary to keep the green indicators extended.
12. Crank the engine over slightly with the starter motor to purge any water trapped in the seawater pump. Do not allow the
engine to start.
IMPORTANT: This engine has an automatic start function controlled by the PCM. The start function can be terminated by
turning the key to the OFF position.
13. After the water has drained from the engine, install the blue plugs on the distribution housing and seawater pump if they
were removed and tighten securely.
14. Push the locking lever down on the air pump and remove the pump from the air actuator assembly. Install the cap on the
fitting.
15. Install the blue plug on the heat exchanger and tighten securely.
16. The drain system should remain open while transporting the boat or while performing other maintenance. This helps
ensure that all water is drained.
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Port side view
Starboard side view
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