© 5/2013 Ilmor Marine, LLC, Version 1.0 8-3
STORAGE AND WINTERIZATION
4. Reinstall cooling hoses, engine block drain plugs, and heat exchanger
end caps/drain plugs aer all raw water has been drained. Drain other
components that contain raw water, such as the water heater.
5. Fill all components of raw water system with a nontoxic −50°F (−45°C),
−60°F (−51°C) or −100°F (−73°C) marine/RV antifreeze. Freeze
protection level will depend on climate location. Marine/RV antifreeze
will provide freeze protection to water pockets that did not drain and
necessary corrosion protection. See Engine Specications on page 11-1
for coolant capacity specications per engine. ere are two methods
for lling your engine with antifreeze:
• Open Cooled System
1. Close thru-hull water pick-up seacock.
2. Fill engine block and heads from thermostat housing. Remove
both exhaust header feed hoses. Li either the port or starboard
hose as high as possible and ll until full. e other removed
hose allows air to purge.
3. Fill port and starboard exhaust manifolds by removing
thermostat hose ends. Li hose end as high as possible and ll
until full.
4. Fill sea strainer if not full.
• Closed Cooled System
1. Close thru-hull water pick-up seacock.
2. Fill raw water components by removing both 1 in. hoses from
exhaust downturn adapters. Li either the port or starboard
hose as high as possible and ll until full. is should ll the
raw water side of the engine heat exchanger, oil/transmission
heat exchanger, raw water pump and sea strainer. e sea
strainer may need to be opened to purge air.
3. Fill sea strainer if not full by end of procedure.
4. Fill downturn exhaust adapters with 1/4 to 1/2 gal (1 to 2 L) of
antifreeze.
5. Reinstall hoses.
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