Mercury Zeus 3000 Series, User Manual

Page: 120 / 160

Section 5 - Maintenance
Page 112 90-866938081 MAY 2009
BOAT IN THE WATER
!
CAUTION
Water can enter the bilge when draining the seawater system, damaging the engine or
causing the boat to sink. Remove the boat from the water or close the seawater inlet and
discharge seacocks and operate the bilge pump when draining. Do not operate the
engine when draining the seawater system.
1. On models using a through‑hull seawater inlet, refer to your boat manufacturer for
instructions and close the seawater inlet valve or seacock.
2. On models using the through‑drive seawater inlet, close the seawater inlet seacock.
Rotate the handle in the direction indicated by the arrow.
a
c
b
41196
Typical port handle
a - Inlet seacock
b - Former position (open)
c - Handle in closed position
3. Close the seawater return (overboard) seacock. Rotate the handle in the direction
indicated by the arrow.
a
b
41199
Drive cover removed for clarity
a - Return seacock
b - Handle in closed position
4. Turn on the bilge pump.
NOTE: In the following step, lower or bend the hose as necessary to allow the seawater
to drain completely.