MerCruiser Black Scorpion, User Manual

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Section 6 - Storage
90-865253070 JUNE 2007 Page 87
3. On models with a seawater pickup pump, remove the two blue drain plugs. If the
seawater pickup pump does not have blue drain plugs, or you are unable to access
them, loosen the clamps and remove both hoses.
6145
b
a
a - Hose clamps b - Blue drain plugs
4. 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.
5. After the cooling system has been drained completely, install the drain plugs, reconnect
the hoses, and tighten all hose clamps securely.
BOAT IN THE WATER
1. Close the seacock (if equipped) or remove and plug the water inlet hose.
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
10226
M110050
93235672
b
a
a
b
6129
a - Cylinder block drain plug b - Exhaust manifold drain plug