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A/C raw water pump runs very hot
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Joeboch348 Offline
Deck Hand
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Joined: May 2021
Home Port: Lighthouse Point, FL
Vessel Info: 1993 3100 Open twin crusader 454s
#1
05-15-2024, 02:11 PM
1993 3100. I replaced the raw water pump for the ac unit because it gets really hot. The brand new one runs just as hot. It’s a cal marine ms580. Did I replace a properly running pump?  Both blow cold air
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ReelMagic Offline
Admiral
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Joined: Dec 2010
Home Port: Kings Park, NY
Vessel Info: 2003 38' Open Cummin's 6CTA's (450 hp)
#2
05-16-2024, 06:05 AM
I'm not familiar with your pump but I believe Tiara used MARCH LC-3CP-MD 115 VAC MAGNETIC DRIVE CENTRIFUGAL PUMP 0130-0158-0200.. Size of pump was based on the A/C units installed.....
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Sans Peur Offline
Admiral
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Joined: Apr 2018
Home Port: Port Canaveral, FL
Vessel Info: 2003 Tiara 50 Open 3406E Cats
#3
05-19-2024, 11:02 AM
All my pumps (4 of them) create heat in the ER. They are all 240v and wired correctly. They just seem to run like that.
Sans Peur 2003 Tiara 50 Open
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Sapphire Offline
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Joined: Jun 2022
Home Port: Longboat Key, FL
Vessel Info: 2020 53 Fly CAT 12.9-1000 Straight Shaft
#4
05-20-2024, 10:10 AM
Both of our 240 volt pumps run hot.  I think it's just the nature of the beast.
2020 53 Fly
CAT 12.9L-1000, straight shaft
Gulf Coast Florida 
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A/C raw water pump runs very hot00