Mercury 4.3 MPI SeaCore User Manual

Section 5 - Storage
Page 100 90-8M0113859 eng DECEMBER 2015
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4.3 MPI ECT—Remove the blue plug at the distribution housing at the lower front right corner of the engine.
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4.3 MPI ECT
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5.0 MPI ECT—Rotate the blue handle counterclockwise until it stops (approximately two turns). The red on the
handle shaft indicates that the drain system is open. Do not force the handle as this will create new threads.
2.
4.3 MPI ECT and 5.0 MPI ECT—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 - Blue handle
b - Blue drain plug location
3. Visually verify that water is draining. On the 5.0 MPI ECT, if water does not drain, remove the blue drain plug from the
distribution housing and drain manually.
5.0 MPI ECT
a - Blue drain plug
b - Drain location ‑ orange or red
4. Allow the system to drain for a minimum of ten minutes. We recommend leaving the drain system open while transporting
the boat or performing other maintenance.
5. Reinstall the blue drain plug in the thermostat housing.
6. Close the drain system by installing the blue drain plug or rotating the blue handle clockwise until it stops. The handle is
fully seated when no red is visible. Do not overtighten the handle, as this action will create new threads.
a
b
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a
b
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Mercury 4.3 MPI SeaCore Specifications

General

Brand	Mercury
Model	4.3 MPI SeaCore
Category	Engine
Language	English