SO37 Wet Muffler Replacement

[treugene]

My Volvo Penta MD2040 muffler has been leaking seawater and as such I removed it only to find that the stainless ends have holes that have corroded through the thin stainless material.
I am not inclined to replace it with the same type of muffler as life expectancy appears to be around 4 years and at a cost of around $1000 seems prohibitive.
I am looking for advice on an alternativ e.g. Vetus plastic mufflers

[vasko]

Strange I have a VP2003 on my 1991 Sun Liberty 34 and my muffler seems to be from the begging of the boat and still going well... 

[jcoughlin]

I had a Ventus plastic muffler on my Jeanneau One Design 35, I’m sure it was an original with zero problems 

[snwl]

Same engine and same problem with the muffler. Try:
www.yachtshop.eu/en/product/5137000/Water/gas%20separator%204.5%20l
or closer to you
www.technicalequipment.co.nz/ProductDetail.aspx?pid=238&cid=25

[treugene]

Many thanks for the great advice - I ordered my Vetus HD muffler today.

[ianqv]

Hi Exactly the same thing happened to mine.
I replaced it with a 7ltr plastic silencer.
Has run without problems.

You may wish to also check your exhaust elbow.

Best Regards

Ian

[snwl]

Four years in use. From the outside it looks like a new one. But when we dismantle it, it looks like this. :-)



shrani.si/f/c/my/25ugmvHK/img20180408181424.jpg


shrani.si/f/2t/cQ/Xg6FqBo/img20180408181449.jpg


shrani.si/f/3w/lq/1ww1HJbS/img20180408181510.jpg

[sleighride]

I have a 2003 DS43 and like Vasko, no problems with the stainless steel muffler after 16 years of hard use (4700 hours on the engine.) However, as Ian suggests, the mixing exhaust elbow in my case is not so reliable. I replaced the original two years ago based upon this owners' blog, even though it was not leaking. This last summer, with the new Yanmar replacement, it had pin hole leaks and I had to get q new one. Yanmar's quality control seems to have suffered a bit in recent years, at least for the mixing elbows.