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Anyone have these engines?I have some questions on the built in winterizing kit these engines come with and the bike pump attachment kit on the heat exchanger. There is a nipple ontop of the exchangers and think thats where you pump the air in. They are 08 engines...thanks in advance...
 

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The only thing that drain system is good for is prolonging your boating season. You still need to run antifreeze through the engine and hoses. Even after you drain down everything using the drain system we have found small pockets of water. :D

From Mercs website:
Draining of the seawater section of your engine does not mean it is winterized, MerCruiser recommends that propylene glycol antifreeze be used in the seawater section to insure protection from freeze damage. Failure to do this may result in trapped water causing freeze and/or corrosion damage to the engine. Damage caused by freezing or improper winterization IS NOT covered by the MerCruiser limited warranty.

Mercury Marine | Service & Warranty

The drain system on your engine is NOT intended to replace full winterization. It is for extending your boating season by allowing the cooling system to be drained after use if there is a risk of light freezing weather and you will be boating the next day. For full extended winter storage, after completely draining the cooling system, Mercury MerCruiser recommends the use of propylene glycol antifreeze (with a rust inhibitor for marine engines) in the seawater section of the cooling system. The fuel system must have fuel stabilizer added and the system must be fogged with 2-cycle oil. We strongly recommend that your product is winterized by an authorized MerCruiser dealer. Damage caused by freezing or improper winterization is NOT covered by the limited factory warranty.
 
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