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Section 5 - Storage
Water trapped in the seawater section of the cooling system can cause corrosion or freeze damage. Drain the seawater
section of the cooling system immediately after operation or before any length of storage in freezing temperatures. If the boat
is in the water, keep the seacock closed until restarting the engine to prevent water from flowing back into the cooling system.
If the boat is not fitted with a seacock, leave the water inlet hose disconnected and plugged.
12. Fill the seawater cooling system with propylene glycol mixed to the manufacturer's recommendation to protect the engine
to the lowest temperature to which it will be exposed during freezing temperatures or extended storage. This will also
prevent the formation of exfoliating rust in the cooling system passages.
13. Tilt the sterndrive to the full down position.
14. Store the battery according to the manufacturer's instructions.
Maintenance
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected engine starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing engine or drive components.
Fuel vapors trapped in the engine compartment may be an irritant, cause difficulty breathing, or may ignite resulting in a fire
or explosion. Always ventilate the engine compartment before servicing the power package.
IMPORTANT: Refer to the maintenance schedule for the complete listing of all scheduled maintenance to be performed. A
repair shop or person of the owner's choosing may maintain, replace, or repair emission control devices and systems. Certain
other items should be performed only by an authorized Mercury MerCruiser dealer. Before attempting maintenance or repair
procedures not covered in this manual, we recommend that you purchase a Mercury MerCruiser service manual and read it
thoroughly.
NOTE: Maintenance points are color‑coded for ease of identification.
Yellow
Black
Brown
Blue
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.
Page 86
NOTICE
WARNING
!
WARNING
!
Maintenance Point Color Codes
Power steering fluid
CAUTION
!
Engine oil
Drive lube
Drain or flush
90-8M0128976
MAY 2017
eng
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