I have read ( I haven’t seen it personally) that if you are sailing for long periods in following seas (e.g. ocean crossings), you may want to have a shut off valve installed on the exhaust hose. Some people reported that despite the high point in the hose, the sea water eventually filled up the muffler and then made its way into the cylinders causing a water (hydro) lock. Not a fun task to do when you are approaching your destination.
Marek From: Rick Brass via CnC-List Sent: Monday, January 29, 2018 20:04 To: cnc-list@cnc-list.com Cc: Rick Brass Subject: Re: Stus-List Vented loop for engine above exhaust elbow? And,, BTW, I don’t see the raw water line into the exhaust elbow as the most likely source of siphoning water into the exhaust manifold. More likely water from the hose and muffler. Again, Westerbeke/Universal recommends that the hose between muffler and outlet have a high point at least 18” above the waterline (and that the high point be near the transom to prevent following waves from filling up the exhaust system). My high point is about 24” up (in the starboard lazarette) just above the muffler and then slopes down and aft to an exit under the break of the transom and 6” above the waterline. Rick Brass Washington, NC From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Patrick Davin via CnC-List Sent: Monday, January 29, 2018 3:51 PM To: cnc-list@cnc-list.com Cc: Patrick Davin <jda...@gmail.com> Subject: Re: Stus-List Vented loop for engine above exhaust elbow? For those that have one, do you know what kind you have? Vetus makes a few - https://www.google.com/search?q=vetus+vented+loop<https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.google.com%2Fsearch%3Fq%3Dvetus%2Bvented%2Bloop&data=02%7C01%7C%7C5e818bdb18e14e2f43ba08d5677d6bb0%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636528710724185314&sdata=hr2byCd2EFJt7xyMKMxp7e8biuKIn%2Fsy5VqmbBjfW7g%3D&reserved=0> - and there are the Forespar Marelon ones. I read some of the Vetus ones require running a vent line overboard or to a cockpit drain, or they leak water into the boat. Also where do you have it mounted / how high? My mechanic suggested mounting it as high as possible, which means running it up into the stbd lazarette. I'm hesistant about that because our lazarette is jam packed full while cruising (it's our only large storage space).
_______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
