Boat Out Of The Water - Mercury Mercruiser Tow Sport 5.7 MPI Manual

8. Verify that water is draining from each opening. If not, use the Three‑Point Manual Drain System instructions.
a
9. Allow the system to drain for a minimum of five minutes. Pump air as necessary to keep the green indicators extended.
10. Crank the engine over slightly with the starter motor to purge any water trapped in the seawater pump. Do not allow engine
to start.
11. Reinstall the blue drain plug in the thermostat housing or heat exchanger.
12. Remove the air pump from the air manifold and return it to the mounting bracket.
13. Mercury MerCruiser recommends leaving the drain system open while transporting the boat or while performing other
maintenance. This helps ensure that all water is drained.
14. Before launching the boat, pull up on the manual release valve. Verify that the green indicators are no longer extended.
15. Open the seacock, if equipped, or unplug and reconnect the water inlet hose prior to operating the engine.

Boat Out of the Water

NOTE: This procedure is written for the air pump that is attached to the engine. However, any air source can be used.
1. Place the boat on a level surface to ensure complete draining of the system.
2. Remove the air pump from the engine.
3. Ensure that the lever on top of the pump is flush with the handle (horizontal).
4. Install the air pump on the actuator fitting.
90-8M0076545 NOVEMBER 2012
eng
b
a - Green indicators
a
6135
a - Port side drain location
b - Starboard side drain location
6133
Section 6 - Storage
Page 63