IMPORTANT: If water does not drain from the seawater pump housing when both green indicators are extended, remove
the blue plugs on the seawater pump housing.
a - Seawater pump housing water drain
b - Blue plugs
11. There are power packages that require specific drain plugs removed because the engine angle is greater than the air
actuated drain system allows for proper draining of the system. Remove the blue plugs shown in the following illustrations.
TowSport standard cooling in-line transmission port side view
TowSport standard cooling in-line transmission starboard side view
12. Allow the system to drain for a minimum of ten minutes. Pump air as necessary to keep the green indicators extended.
Maintenance
90-8M0099748 eng DECEMBER 2015 © 2016 Mercury Marine Page 1C-35
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