MAINTENANCE
SERVICE MANUAL NUMBER 22
90-860074--1 FEBRUARY 2002 Page 1B-71
IMPORTANT: Mercury MerCruiser recommends that propylene glycol antifreeze
(nontoxic and biodegradable, which makes it friendly to lakes and rivers) be used in
seawater section of the cooling system for cold weather or extended storage. Make
sure that the propylene glycol antifreeze contains a rust inhibitor and is
recommended for use in marine engines. Be certain to follow the propylene glycol
manufacturer’s recommendations.
14. Fill a container with approximately 5.6 liter (6 U.S. quarts) of propylene glycol antifreeze
and tap water mixed to manufacturer’s recommendation to protect engine to the lowest
temperature to which it will be exposed during cold weather or extended storage.
15. Disconnect hose from seawater pump connector fitting. Using an adaptor, temporarily
connect an appropriate length piece of hose to seawater pump and place the other end
of the hose into container of coolant.
75299
a
b
Typical
a-Inlet Hose
b-Connector Fitting
16. Start the engine and operate, at IDLE speed, until antifreeze mixture has been pumped
into engine seawater cooling system.
17. Stop the engine.
18. Clean the engine.
19. Coat the engine with Quicksilver Corrosion Guard or equivalent corrosion inhibiting oil.
20. Lubricate all items outlined in Lubrication.
21. Remove and store battery in a cool, dry place. Do NOT store on a concrete surface, or
on the ground. Place on a dry, wood board or a thick plastic base. Refer to battery
manufacturer’s instructions.
22. Perform all checks, inspections, lubrication and fluid changes outlined in the
Maintenance Schedules.
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