[C320-list] Engine hoses & exhaust elbow

[jonvez at comcast.net]

Scott,

Yes, that vented loop is critical--I was thinking of replacing the hose just up to the first cut at the vent in the loop since I really only have some minor wear at the point where the hose rubs against the overhead bulkhead that's above the engine. I thought I'd swap out my hoses since I have the exhaust apart, but they really aren't in bad shape so I may wait. Probably a good winter project....thanks...

Regards,

Jon Vez

-------------- Original message -------------- 
From: Scott Thompson <sthompson at toad.net> 

> 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 
> > 
> 
>