MerCruiser Tow Sports 5.7 MPI, User Manual

Page: 88 / 102

Section 6 - Storage
Page 80 90-865253073 DECEMBER 2007
6. Pump air into the system until both green indicators extend and water drains from both
sides of the engine. The port side will begin draining before the starboard side.
33144
a
b
c
d
a
d
c
33150
Closed Cooled Models Seawater Cooled Models
a - Blue drain plug location
b - Blue air pump
c - Air manifold
d - Green indicators
7. Verify that water is draining from each opening. If not, use the
Three Point Manual
Drain System
instructions.
a
b
6133
a - Port side drain location b - Starboard side drain location
8. Allow the system to drain for a minimum of five minutes. Pump air as necessary to keep
the green indicators extended.
9. Crank the engine over slightly with starter motor to purge any water trapped in the
seawater pump. Do not allow engine to start.
10. Remove the air pump from the air manifold and return it to the mounting bracket.
11. Mercury MerCruiser recommends leaving the drain system open while transporting the
boat or while performing other maintenance. This helps ensure that all water is drained.