MerCruiser 3.0 MPI, Owner'S Manual

Page: 96 / 114

Section 6 - Storage
Page 88 90-899883272 MARCH 2008
Draining the Seawater System
!
CAUTION
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.
IMPORTANT: The engine must not be operating at any point during the draining procedure.
Single‑Point Drain System
!
CAUTION
Disconnecting the blue drain hoses can cause serious burns due to hot water. Check all
hose connections before operating the engine and never disconnect the hoses until the
engine has had suffient time to cool.
NOTICE
If the boat is at rest in the water with the engine off, an open seacock or water inlet hose
could introduce water into the engine's cooling system or the boat. Keep the seacock or
water inlet hose plugged until ready to start the engine. Attach a tag to the ignition switch
or steering wheel to inform others of the water inlet connection.
IMPORTANT: Do not start or operate the engine at any point in this procedure.
1. If draining with the boat in the water, close the seacock '(if equipped) or remove and
plug the water inlet hose. If draining with the boat out of the water, place it on a level
surface to drain completely.
2. Turn on the bilge pump.