Hot water and water heater

rasbury · August 17

I don't winterize anything...even plants. Just foes not get that cold anymore.

PickleRick · August 17

We have to bring our key lime tree and a patio full of tropicals in for the winter starting every October. The only palms that withstand our winters are the dwarf palmettos and windmills. There are homes around me that have huge beautiful sagos and pindos 10 ft tall but I can't make either survive a winter.

rasbury · August 18

YYZRC said:

Next time your boat is in the water, start the engine and, with the freshwater pump turned off and the engine running, open a faucet (hot or cold). If water comes out, you have a rotten heat exchanger in the water heater.

I had a thought on this- don't i have coolant going through that heat exchanger ? So would i not be leaking coolant? How do I test that valve? I'd eliminate it but sounds like a safety feature...could the valve have gone bad? Where else can go wrong? It was an all of a sudden type problem.

Grahamu · August 18

If the heat exchanger was leaking your coolant level on that engine would drop assuming the engine is closed cooling. I doubt there is a problem with the valve. Are all other faucets/shower working properly?. When you replaced the faucet what color was the tubing?

rasbury · August 18

Thanks @Grahamu, to clarify if the heat exchanger were leaking and the coolant was going in there, it would obviously lower the coolant level and would also come through the facuet which neither seem to be happening. That sink behind the helm only has a blue cold line to it. I can't say for sure I tested other faucets but assumed it's all the same feed line. I will check next run but would have to assume they would act the same. That valve is the only thing sticking out to me unless there is some other internal check valve? And I am closed cooling..

PickleRick · August 19

If you want to easily rule out your antifreeze leaking into the heater you could probably run down to your local auto parts store and grab a heater core bypass kit, it's located in the aisle where the radiator hose clamps are.

It's a 5/8 barb fitting, double sided. Pull the hoses off of your water heater and connect them together.

rasbury · August 19

Thanks @PickleRick- that is on the list. For as hot as the water is coming out if that was leaking then I'd think I could smell it or their would be residue. I will have to look things over again- makes no sense as there was only one supply line involved. I must be missing something. The coolant level does not seem like it is going down.

YYZRC · August 19

Presumably the water heater is full of water - that water (plus coolant?) has nowhere to go until you open a faucet. Therefore your coolant level would not drop.

As always, several pics of the entire setup (engine and water system) would help considerably.

rasbury · August 19

That's what l meant- I let the water run for a bit and nothing happened other than a lot of hot water. I will get more pictures of the hoses from the motor- i just fail to
see what i screwed up! I

Grahamu · August 19

The problem is that hot water is getting into the cold water pipes. To me it doesn't make sense that the tank is the problem, In order for hot water to come out of it cold has to go in under pressure and it's not possible to have hot and cold water running in different directions in the blue pipe feeding the hot water tank. I'm now thinking it could be at the shower heads. If the valves are open at the transom shower and the shower head valve is closed it would allow mixing of hot and cold water. Just a thought but I would be checking all faucets and showers are working correctly first. With the helm faucet open you could also feel the blue pipe feeding the tank to see if it's hot.

rasbury · August 19

Interesting. Before I pulled my few remaining hairs out i will test the function with all the shower heads off at the handles as well . I would not put the kids in the boat like this- it will be be next week before I can get back in the water...

rasbury · September 6

YYZRC said:

Presumably the water heater is full of water - that water (plus coolant?) has nowhere to go until you open a faucet. Therefore your coolant level would not drop.

As always, several pics of the entire setup (engine and water system) would help considerably.

I have the boat home today. I accessed the helm faucet and indeed there is a blue line to it- there were no other options for hookup so I confirmed that. I c

i

rasbury · September 6

No other repairs were made to, well, anything..2006 350 mpi, has the heat exchanger with coolant for engine cooling. I'll be interested in any comments. That heater is not cheap!

Grahamu · September 6

YYZRC said:

Next time your boat is in the water, start the engine and, with the freshwater pump turned off and the engine running, open a faucet (hot or cold). If water comes out, you have a rotten heat exchanger in the water heater.

Have you tested the whole water system? If all works properly without engine running then do as @YYZRC posted above

rasbury · September 6

Grahamu said:

YYZRC said:

Next time your boat is in the water, start the engine and, with the freshwater pump turned off and the engine running, open a faucet (hot or cold). If water comes out, you have a rotten heat exchanger in the water heater.

Have you tested the whole water system? If all works properly without engine running then do as @YYZRC posted above

Yes I replied to that comment- since I have coolant, is that what is going through the heater or water? I should be in the water am and can do that test. I also have the boat at home on an extension cord and I don't know how much juice the heater needs- i did test the hot/cold and it seem to be getting hot and the cold working normally...

rasbury · September 8

I did test and the water is coming through with the helm switch off. These heaters are 600 bucks! So if I pulled the hoses, I guess cap off the lines at the heater, will the system work on just the cold then? I'll replace it but a lower priority right now.

Dream_Inn · September 8

You’d be better off connecting the hoses together for now. That way both hot and cold work, just cold out of both. This keeps the hot water line from getting stagnant.

Grahamu · September 9

You will have to join together the 2 black hoses at the tank that are connected to the engine. You will lose some coolant so you need to top it up. Now you have to deal with the tank which has a hole(s) in the heat exchanger. You can either blank off the 2 open connections to withstand the pressure from the pump and get hot water when on shorepower or join the red and blue hoses together and have cold water in the system

raybo3 · September 9

@rasbury $600 where are you looking?
Kuuma 11810 Marine Water Heater 6 Gallon Front Heat Exchanger 120V Side Mount | eBay

YYZRC · September 9

Post photos of the front and top of your motor, Rick.

rasbury · September 9

raybo3 said:

@rasbury $600 where are you looking?
Kuuma 11810 Marine Water Heater 6 Gallon Front Heat Exchanger 120V Side Mount | eBay

450 plus tax and shipping would be getting close sir! I'll have to look- I like to have things as intended and working best I can..

rasbury · September 9

YYZRC said:

Post photos of the front and top of your motor, Rick.

I'll have to take up later- boat back to storage and we've been rain city.

Howdy, Stranger!

Quick Links

Categories

Hot water and water heater

Comments