Section 6 - Storage 
Page  100 90-899883179   OCTOBER  2007
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
a
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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.  Mercury  MerCruiser
recommends  leaving  the  drain  system  open  while  transporting  the  boat  or  while
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. Prior to 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
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M110050
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b
a
a
b
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a - Cylinder block drain plug
b - Exhaust manifold drain plug