MerCruiser 13, Service Manual

Page: 305 / 348

6A - 4 - SEWATER COOLED MODELS 90-816462 2-695
Cold Weather Or Extended
Storage
! CAUTION
Cooling system must be completely drained for
storage, or trapped water may cause freeze and/
or corrosion damage to engine.
! CAUTION
If boat is in the water, seacock (water inlet valve),
if so equipped, must be left closed until engine is
to be restarted to prevent water from flowing back
into cooling system and/or boat. If boat is not
fitted with a seacock, water inlet hose must be left
disconnected and plugged to prevent water from
flowing back into cooling system and/or boat. As
a precautionary measure, attach a tag to the igni-
tion switch or steering wheel of the boat with the
warning that the seacock must be opened or the
water inlet hose reconnected prior to starting the
engine.
IMPORTANT: Observe the following information
to ensure complete draining of cooling system.
•
Engine must be as level as possible.
•
A wire should be repeatedly inserted into all
drain holes to ensure there are no obstruc-
tions in passages.
IMPORTANT: To prevent threads in manifolds, el-
bows and cylinder blocks from rusting out during
storage, reinstall plugs using Quicksilver Perfect
Seal on threads. Never leave drain plugs out dur-
ing storage.
NOTE: If possible, place a container under drains and
hoses to prevent water from draining into boat.
1. Engine must be level or front of engine slightly
higher to properly drain cooling system.
2. Remove hose from power steering cooler.
71422
a
a - Raw Water Hose to Power Steering Cooler
3. Remove drain plugs from port side of cylinder
block and exhaust manifold.
71424
a
a - Drain Plugs