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1994 390CPMY 11 gallon water heater
- tonyiiiafl
- CYO Supporter
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- Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
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1994 390CPMY 11 gallon water heater
Thanks as always!
Tony
- Midnightsun
- CYO Supporter
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- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
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Re: 1994 390CPMY 11 gallon water heater
I see no point in going with an Isotherm. I replaced mine with the same brand as the original a few years back just for the convenience of not having to change fittings and or extending cutting lines and moving bracket making new holes, leaving old one to plug up.
That being said I did replace it with one that has a heat exchanger as they are more common than without and are cheaper due to supply and demand. Heat exchanger is not hooked up and does not need to be.
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Suspicious Fishes !
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Re: 1994 390CPMY 11 gallon water heater
If your worried about it, pull the element and look inside with a borescope.
- Midnightsun
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2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
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Re: 1994 390CPMY 11 gallon water heater
Its a stainless tank and if it is flushed at least once a year (when winterizing) to get any deposits of the bottom, it should last darn near forever.
The exterior is stainless, the tank is aluminum and is very prone to oxidation, they have a limited life span as most do not even have anode protection.
See here. viewtopic.php?f=11&t=3660&hilit=heater
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Re: 1994 390CPMY 11 gallon water heater
- Midnightsun
- CYO Supporter
- Posts: 2850
- Joined: March 27th, 2016, 2:27 pm
- Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's - Location: Montreal, Canada
- Has thanked: 257 times
- Been thanked: 1099 times
Re: 1994 390CPMY 11 gallon water heater
- tonyiiiafl
- CYO Supporter
- Posts: 887
- Joined: November 19th, 2015, 4:00 am
- Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
- Location: Cape Cod, MA
- Has thanked: 589 times
- Been thanked: 175 times
Re: 1994 390CPMY 11 gallon water heater
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- CYO Supporter
- Posts: 5810
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 432 times
- Been thanked: 1588 times
Re: 1994 390CPMY 11 gallon water heater
There are a few ways to deal with all the coolant in the lines and tank. I like to first remove the lines from the engine. When you remove each hose, hold it up high and be ready to cap off the engine ports. Have a pail ready, place one hose in the pail. Once the coolant starts running, it should siphon the contents out of the tank's heat exchanger. You can blow through the other hose to ensure you got everything. This will minimize the mess you make when you remove the hoses from the tank and when you tilt the tank to get it out of that space. After hook up, run the engine for a while, then top up with the coolant you put in the pail.
Make sure your hot water tank is full of water (purge hot water faucets) before you turn the heater on and test.
Let us know how it goes.
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- CYO Supporter
- Posts: 2291
- Joined: March 28th, 2016, 10:52 pm
- Vessel Info: 1998 Carver 355
Suspicious Fishes !
2022 Kawasaki 310X - Location: upper chesapeake bay
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Re: 1994 390CPMY 11 gallon water heater
I replaced the element and thermostats a few years ago on my 1998 vintage seaward and looked inside with my borescope, all was clean and shinny. Looked like stainless.
- tonyiiiafl
- CYO Supporter
- Posts: 887
- Joined: November 19th, 2015, 4:00 am
- Vessel Info: 1994 Carver 39 Cockpit Motor Yacht
- Location: Cape Cod, MA
- Has thanked: 589 times
- Been thanked: 175 times
Re: 1994 390CPMY 11 gallon water heater
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