Boat Out Of The Water; Multipoint Drain (Mpd) System - Mercury Mercruiser Tow Sport 5.7 MPI Manual

Section 6 - Storage
4. Remove the two blue drain plugs from the seawater pickup pump (front, starboard side).
5. Verify that water is draining from each opening.
6. Allow the system to drain for a minimum of five minutes. We recommend leaving the drain system open while transporting
the boat or performing other maintenance to ensure that all water is drained.
7. Crank the engine over slightly with the starter motor to purge any water trapped in the seawater pickup pump. Do not allow
the engine to start.
8. Before 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.

Boat Out of the Water

NOTE: Use this procedure if your engine is not equipped with an air actuated single‑point drain system or if the single‑point
drain system fails.
1. Place the boat on a level surface to ensure complete draining of the system.
2. Remove three blue drain plugs: one from the distribution housing (lower front, port side) and two from the seawater pickup
pump (front, starboard side).
a - Blue drain plug
3. Verify that water is draining from each opening.
4. Allow the system to drain for a minimum of five minutes. We recommend leaving the drain system open while transporting
the boat or performing other maintenance to ensure that all water is drained.
5. Crank the engine over slightly with the starter motor to purge any water trapped in the seawater pickup pump. Do not allow
the engine to start.
6. Before launching the boat or starting the engine, close the drain system by installing the three blue drain plugs.

Multipoint Drain (MPD) System

Boat Out of the Water

1. Place the boat on a level surface to ensure complete draining of the system.
2. Remove the blue drain plugs from the following locations. If necessary, clean out the drain holes using a stiff piece of wire.
Do so until the entire system is drained.
a. Port and starboard side of cylinder block
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Blue drain plugs
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90-8M0076545 NOVEMBER 2012
eng