Hooking up a Hot Water heater to raw water 318

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barkleydave
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Posts: 390
Joined: Sat Jul 12, 2014 6:18 am
Location: Kentucky

Hooking up a Hot Water heater to raw water 318

Post by barkleydave »

It has been a long time since I have been on the forum. Health issues pretty much limited my boating last season. Back up and going strong!

Anyway time for spring commissioning. My Raritan OEM Hot Water heater finally rusted out. Gee only 31 years of service!

I would like to replace it with a heater that is 120V and also see all now have heat ex-changers. Doe anyone have a drawing showing where to run the ex-changer lines on a Chrysler 318 Raw water cooled engine.

It would be nice to have it heat water underway.

Thanks!

Barkleydave
1987 Marinette 29 FB Sedan
Retired Boat Accident UL and USCG trained investigator
Retired USCG Captain
jralbert
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Re: Hooking up a Hot Water heater to raw water 318

Post by jralbert »

Glad to hear you've recovered.

First source would be Raritan - their units have gone into almost every kind of setup one could imagine. And it would be great to post the results and a how-to once you've done the project
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD
barefoot99
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Location: Cincinnati OH

Re: Hooking up a Hot Water heater to raw water 318

Post by barefoot99 »

Inlet line off the intake manifold , return line back into engine circulating pump suction.

Pull the allen wrench fitting out next to the bypass line on the pump and pipe in the water return there. Use PB blaster to get it loose, engine warmed up. That way you are on the discharge (intake manifold) and suction ( Pump volute) sides of the circulating pump, regardless of t-stat position.
SUP !
1982 32 Sedan FB
2021 hrs
360's-Edelbrocks, DUI
Raw water cooled
Norris Lake
Speedwell,TN.
barkleydave
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Posts: 390
Joined: Sat Jul 12, 2014 6:18 am
Location: Kentucky

Re: Hooking up a Hot Water heater to raw water 318

Post by barkleydave »

Ok thanks... A picture of a setup would be helpful..
1987 Marinette 29 FB Sedan
Retired Boat Accident UL and USCG trained investigator
Retired USCG Captain
barefoot99
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Location: Cincinnati OH

Re: Hooking up a Hot Water heater to raw water 318

Post by barefoot99 »

Dave,the supply to the heater comes out of the intake manifold and returns in the top of the water pump.

Hope the picture makes it , first try.

-Scott
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SUP !
1982 32 Sedan FB
2021 hrs
360's-Edelbrocks, DUI
Raw water cooled
Norris Lake
Speedwell,TN.
Fastjeff
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Location: Rock Halll, MD

Re: Hooking up a Hot Water heater to raw water 318

Post by Fastjeff »

Welcome back!

Do you have to have the heater connected to your engines? A good, well-insulated heater will hold a lot of hot water for several hours.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
barefoot99
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Re: Hooking up a Hot Water heater to raw water 318

Post by barefoot99 »

Jeff,the heater is hooked to the starboard engine it does a wonderful job. We camp on our M a lot -cruise to a spot on Friday night drop anchor and still have hot water in the morning. Water heater is 11 gallons with a heat exchanger , also can use the electric element to boost it hotter in less than 10 minutes next morning . Still warm at supper time . Hot showers are nice on the back deck in the fall, when the temps getting cooler. ;)
SUP !
1982 32 Sedan FB
2021 hrs
360's-Edelbrocks, DUI
Raw water cooled
Norris Lake
Speedwell,TN.
Fastjeff
Site Admin
Posts: 1377
Joined: Sat Jul 12, 2014 5:06 am
Location: Rock Halll, MD

Re: Hooking up a Hot Water heater to raw water 318

Post by Fastjeff »

Some people sure are soiled! What's a little semi-cold shower water now and then?

Sounds like you're back to enjoying your M again. Glad to hear it.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington
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