[C320-list] Exhaust question

[Jeff Smith]

I second this. My pump was cycling and I would get water in the area by the
 sewage holding tank. I finally traced it to a leaking  calorifier (hot
water heater). I just removed the hot water heater though most will replace
it. To diagnose it, though, removed the galley drawers and cabinet face and
then watched the hot water heater until I saw water seeping out.

Cheers,
Jeff
#121

On Tue, May 28, 2024 at 7:04 AM Troy Dunn via C320-list <
c320-list at lists.catalina320.com> wrote:

> The water muffler is the most likely exhaust leak on the Yanmar.
> Surprised you had an exhaust elbow issue, the elbows from that time frame
> were stainless steel and seem to hold up for a very long time.   Did you
> see the old elbow.   Was it stainless?  If so, was the leak at the weld
> where the raw water tube is injecting water into the exhaust pipe?
>
> Although the leaking muffler would explain water in the bilge, generally
> the 'pan' under the engine fills with water when the exhaust muffler leaks.
>   So, assuming you don’t have that issue and assuming the leak is happening
> when not running the engine, I would start with the fresh water system.
> If this is a freshwater leak you should either hear the pump cycle every
> few minutes or so, or….the leak is before the pump which generally entails
> some boat yoga to check the outlets of the water tanks.    If you narrow it
> down to a freshwater leak beyond the pump (I.e. the pump is in fact cycling
> when water isn’t in use) but don’t see any obvious water leaks…check around
> the water heater under the galley sink.   The water heater (calorifier for
> the folks across the pond) will eventually leak and have to be replaced.
> Getting to all the fittings and connections requires removal of the galley
> drawer unit.  Just remove the drawers, unscrew the frame and the whole unit
> slides out.
>
> Troy Dunn
> Hull#514
>