Re: Yanmar - Replacement Exhaust Elbow position

Dan Carlson

Thanks for the feedback Eric,

Structurally the hose is probably good for more years to come, but I'm having the cooling system serviced and while it's all disconnected I thought a new hose would be good. There is some corrosion in a few places where cracks in the hose have allowed air/moisture to corrode the wire inside the hose. And so the question is; if replacing, then why put such a tight bend back into the new hose. 

Thanks and regards, Daniel and Lori Carlson on sv BeBe, SM #387

On Mon, Jul 19, 2021, 8:05 PM eric freedman <kimberlite@...> wrote:

Hi Dan,

Mine has been at that angle for the last 19+ years with no problem. I did have a metal water lift muffler made as my plastic one melted down.  You can move the muffler a bit for and aft to find a sweet spot for the hose. I also I had them change the angle on the muffler input slightly to reduce the bend in the hose.


Fair Winds




Kimberlite Amel Super Maramu #376





From: On Behalf Of Dan Carlson
Sent: Monday, July 19, 2021 11:43 AM
Subject: [AmelYachtOwners] Yanmar - Replacement Exhaust Elbow position


This is specifically for Amel SM owners with the Yanmar 4JH3-HTE engine who have replaced the Exhaust Elbow with the cast SS replacement.    (see attached photos)


I am planning to replace the ~1 meter exhaust hose that goes from the Exhaust elbow to the water separator.   When the mechanic looked at it his first question was “can the mounting be rotated 120 degrees so that it does not put such a bend in the exhaust pipe?”    So that is my question to this group. 


My replacement elbow is currently mounted with the exhaust exit vertical with a slight bend to the back of the engine, the water comes in from the front side.   If I rotated it 120 degrees, then the exhaust would exit more toward the back and greatly reduce the bend in the exhaust pipe.  The water would come in at a lower angle.   I don’t think that it would introduce any more risk of water back up into the turbo.  


Anyone have experience or knowledge related to this?


Thanks and regards,  Daniel Carlson, Amel SM #387, sv BeBe





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