[C320-list] Engine hoses & exhaust elbow

[Scott Thompson]

Jon:  The hose to the exhaust elbow is a raw water hose.  It's coming 
from the heat exchanger.  The apparent excursion to the galley is 
actually to the port side cockpit locker where it has a vented loop 
before coming back down into exhaust elbow.  That's to keep a siphon 
from developing through the raw water system into your muffler, which 
could back up and flood the engine itself through the exhaust.

The hoses to the hot water heater are part of the closed loop running 
engine coolant.  I have not replaced either set of hoses.

jonvez at comcast.net wrote:
> Has anyone replaced the engine hoses on the Yanmar? I'm specifically looking at replacing the hose that runs into the exhaust elbow. It seems to wind through the galley and I believe to the hot water heater, but can't be sure. If anyone has done this project, I would appreciate any advice...
>
> Also, I finally removed the 'custom' exhaust elbow and I'm relieved to see that it was in great condition after about 450 hours and 8 seasons. After removing the hose to the muffler, I've got to believe that the vibration along with the stiffness of the hose contributes to the premature failures of the mufflers. I was very concerned about breaking off the hose inlet on the muffler while removing that hose. I am considering putting a Trident hump connector in to alleviate this potential problem. Has anyone done this?
>
> Regards,
>
> Jon Vez
>