MerCruiser 350 MAG MPI Tow Sports Owner's Manual page 98

Section 6 - Storage
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.
a
b
Closed Cooled Models
7. Verify that water is draining from each opening. If not, use the Three Point Manual
Drain System instructions.
a
Page 90
c
d
a - Blue drain plug location
b - Blue air pump
d
Black Scorpion Models
a - Blue air pump
b - Air manifold
a - Port side drain location
a
6124
Seawater Cooled Models
c - Air manifold
d - Green indicators
a
b
c
d
21125
c - Green indicators
d - Blue drain plug locations
b
b - Starboard side drain location
c
b
d
6125
6133
90-864197070 JUNE 2007