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Old 17-05-2009, 07:26   #1
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Join Date: Nov 2008
Location: palacios TX
Boat: 1990 Hunter 28
Posts: 13
Marine A/C Installation

Going to install a/c unit in head near the cockpit. Will be very close to the engine compartment. I was thinking , would I be able to tee into seawater intake for the yanmar 20GM20F, (Freshwater cooled)???? say like inline before the seawater pump for engine coolant cooling?? I really dont want to have my boat look like swiss cheese adding more holes.. lol Holes are a BAD THING in a boat right??hahahaha Thanks in advance

Marky Palcios Texas
1990 Hunter 28
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Old 17-05-2009, 09:44   #2
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Location: Ft Lauderdale, FL
Boat: 40 ft Pilgrim Trawler, MERIDIAN 2 (squared)
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Never......Never.....ever use the engine cooling intake for anything other than engine cooling!!!!!!!!!!!!!

Do not go where the path may lead.........
go instead where there is no path........
and leave a trail.
Ralph Waldo Emerson
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Old 17-05-2009, 09:59   #3
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Location: Colorado
Boat: Manta 40
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Yep, not enough volume there. A new thru-hull would be the way to go, properly done it will last 10+ years and not leak or keep you awake at night.

If you can't get hauled for awhile tee into something that is less critical, maybe your watermaker?
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Old 17-05-2009, 10:45   #4
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Are you going to be running the AC while running the engine. If not should not be a big deal. How man BTU's is the unit? My AC hose are 5/8 ID 16000 and 2 8000 BTU units. The engine raw water is 1 1/4 in. What size is your raw water thru hull?
Make sure you angle the pan for the condensate to drain. I have my drain rigged to the shower sump I like to keep my bilge dry.
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