Winterizing boat A/C

ddurand

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Can I winterize a boats A/C with air vs antifreeze? I have a Ryobi cordless combo tire inflator and air inflator for air beds or similar things to be inflated.

I was thinking to use the air from the air inflator to blow out the seawater. It's high volume low pressure. It needs to blow air past the A/C water pump that won't be running.
 

cwms

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I have a problem winterizing by just eliminating water. Everything is still wet and put air in there and you promote a lot of rust. Replacing that water with rust inhibited antifreeze is the only way to go.
 

boatbum

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I was up in Kingston NY at RYB. I used air exclusively for the whole boat. Two ACs, icemaker, water system. The only AF I used was in the engines, the toilets and sink drains. However, I used a compressor set to about 40 PSI so I had plenty of air coming from the small tank. I applied short bursts, then allowed the compressor to catch up to the tank (the compressor stopped at almost 200psi I think).
 

ddurand

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quote:

Originally posted by cwms

I have a problem winterizing by just eliminating water. Everything is still wet and put air in there and you promote a lot of rust. Replacing that water with rust inhibited antifreeze is the only way to go.






Is it necessary to run the A/C to fill it with antifreeze? If I hold a container of antifreeze up high connected to the A/C intake will that cause the system to fill with antifreeze by gravity?
 

HOGAN

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I only use compressed air on my A/C and water systems. No need to add pink.
 

boatbum

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More specifically I pull the hoses from the AC pump output and pop the inlet cap off to make sure it is dry.
 

pdecat

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Dont your systems drain down when off except for the pump? That would also drain when on land.
 

Planeguy

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I built a pump system so I can run barnacle buster thru my system when it is on the hard and then pump antifreeze thru it.
 

cwms

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quote:

Originally posted by ddurand

quote:

Originally posted by cwms

I have a problem winterizing by just eliminating water. Everything is still wet and put air in there and you promote a lot of rust. Replacing that water with rust inhibited antifreeze is the only way to go.






Is it necessary to run the A/C to fill it with antifreeze? If I hold a container of antifreeze up high connected to the A/C intake will that cause the system to fill with antifreeze by gravity?








My gut answer is no. You need to run the AC.
My current boat, I just close my seacock, open the strainer and start pouring AF when my wife turns on the AC Sytem. A couple gallons and I'm done. Takes me 2-3 minutes. Same procedure for my main engines and genset. Easy Peasy.
 
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