Ditto for me.Forespar Marelon vented loop is what I have
These are OK, but the problem is that the little duckbill valve located inside the cap on top can get crusty with salt and fail to function properly.Forespar Marelon vented loop is what I have, but there are other, cheaper options on line.
Barb size depends on hose size.
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Mine was like that too and was failing so I replaced it.though they did not use the Forespar vented loop but cobbled one together from some bronze plumbing bits.
Ditto. Mine fell apart where they had brazed a nipple on the fitting. I put together a replacement with off-the-shelf plumbing parts.Mine was like that too and was failing so I replaced it.
That's the one!Ah so. My error. My former Universal M25XP did have a "T" fitting in the water line that went to the exhaust elbow, and the top of the T had a 1/4" hose that went aft to a little thru hull on the transom.
When we changed to the Betamarine, they said we could keep it or dispense with it. So I did not continue to use one. Note that the EY installation was not a "vented loop" but rather a connection to a piece of tuning that would allow air to enter the tubing after the engine was shut down. While running the little thru hull on the transom would emit a small stream of water.
Yes as that is a better way to do it. A vented loop would accomplish the same function but maintenance and failure complications are eliminated with the "drain" hose plumbing. Yes I also would like o know how the Beta repels the backwash issues.Note that the EY installation was not a "vented loop" but rather a connection to a piece of tuning that would allow air to enter the tubing after the engine was shut down
I do not know for sure but suspect that the height of the engine exhaust above the waterline is the important factor. My SWAG is that EY did this routinely on all of the King designs because the hull was deep enough that the engine was mounted just low enough to have some little potential for back flooding, sometimes. The Olson has a more shallow hull form aft, so the engine (and top of exhaust) is a bit higher.What was there about your installation that made them say they didn't think you needed one?
Hose comes off sea water pump and up to loop as shown to cool exhaust system.Puzzled, I am, as to just where this would be located. None anywhere in our boat. (?)
For me, I feel more comfortable with a High vented loop...Yes as that is a better way to do it. A vented loop would accomplish the same function but maintenance and failure complications are eliminated with the "drain" hose plumbing. Yes I also would like o know how the Beta repels the backwash issues.