Multi-Point Drain (Mpd) System; Boat Out Of The Water - MerCruiser 4.3L TKS Sterndrive Owner's Manual

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 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.
Multi‑Point 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
b. Bottom of exhaust manifolds
c. Water‑circulating pump hose
a
90-8M0053265 NOVEMBER 2010
a
b
a
a
b
a - Drain plug
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Section 6 - Storage
a
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a - Cylinder block drain plug
b - Exhaust manifold drain
plug
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