Cold Weather Or Extended Storage; Draining The Seawater System; Drain System Identification - Mercury 540 Bravo Manual

COLD WEATHER OR EXTENDED STORAGE

Draining the Seawater System

Water can enter the bilge when the drain system is open, damaging the
engine or causing the boat to sink. Remove the boat from the water or close
the seacock, disconnect and plug the seawater inlet hose, and ensure the
bilge pump is operational before draining. Do not operate the engine with the
drain system open.
IMPORTANT: Only drain the seawater section of the closed cooling system.
IMPORTANT: The boat must be as level as possible to ensure complete
draining of the cooling system.
Your power package is equipped with a drain system. Refer to Drain System
Identification to determine which instructions apply to your power package.
IMPORTANT: The engine must not be operating at any point during the
draining procedure.

Drain System Identification

AIR-ACTUATED SINGLE-POINT DRAIN SYSTEM
eng
a
c
CAUTION
!
b
50399
89
a - Manual pressure
release valve
b - Threaded cap for air
connection
c - Green indicators