[C320-list] Water heater not getting as hot from the engine

[John Morrison]

I just replaced the hoses from the engine to the hot water heater 21 years old. One of them had a bulge in it, yikes! If you remove that little cabinet under the stove you can feel the hoses, they should both be hot after the engine runs for 5 min or so. 
To replace the hoses you must drain the antifreeze from the engine. It was quite a job to get the antifreeze circulating through the water heater again, air lock! The hoses are 10’ long each of anyone is interested. Make sure the antifreeze surge tank has the correct amount in it.
JohnM 
1999#574

Sent from my iPhone

> On Oct 22, 2020, at 4:25 PM, Scott Thompson <surprise at thompson87.com> wrote:
> 
> Wouldn't a blockage cause the engine to overheat? I'm wondering if the thermostat is stuck open, preventing the engine from getting up to temperature if the raw water is cold.
> 
> Scott
> 
> 
>> On 10/22/2020 2:15 PM, Art Harden wrote:
>> You may have a kink hose or blockage in the engine side of the water heater. If it is there are no kinks in the line ther is probably a blockage in the heater.
>> 
>> Art Harden
>> Catalina 320 “Tortuga” #243
>> 937-477-5544
>> 
>>>> On Oct 22, 2020, at 2:04 PM, Leonard Hooks <lehooks at gmail.com> wrote:
>>> 
>>> On my 2001, when water is heated by the engine, the temperature is 10 degrees lower than when heated electrically.  My heater is original, so it is 19 years old.  The manual says it should heat to 140 degrees, but my electric heater only gets the water to 103.  But when heated with the engine, it only gets to 93 even after running the engine 20 minutes (Yanmar 3GM30f).
>>> 
>>> I have checked my coolant and it is not low?
>>> 
>>> Any ideas on why the engine would not heat the water higher than the electric?
>>> 
>>> Leonard Hooks
>>> SV Revelation #856
> 
> -- 
> Scott Thompson
> Surprise, #653
>