Join Date: Jan 2007
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I have a related question on the need for a siphon break on a high loop.
My 30 year old boat has a high loop (with no siphon break), just before the exhaust exits, vertically downward, underneath the transom, which is just above the normal water line. I realize the importance of having siphon breaks when seacock are (or can be when heeled) submerged for periods of time. However, even in bigger seas (coastal cruising only) mine will not stay under - it will be in / out with every crest / trougth.
My 1982 Yanmar 2GM, only has the regular exhaust elbow (not the high riser) and a rubber silencer (not a waterlock muffler), and yet I don't believe it has ever had a problem from following seas.
I read about all of the stuff I should have, but also believe in the "If it ain't broke, don't fix it!!"