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Old 11-10-2015, 07:58 PM   #1
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Exhaust outlet flow

So I was at the boat trying to fix some things, broke a few things-- normal day.

I did notice something interesting.
My exhaust after the water muffler goes up into a siphon loop (guess that's the right phrase?)
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and then Ys with one hose going to port and one to the starboard outlet.
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The starboard hose has good water flow but the port side just has a trickle. Is this OK? I assume the leg going to port just doesn't get as much water at the Y, or maybe the hose is screwed up.

Will try to post a video.
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Old 11-10-2015, 07:58 PM   #2
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Exhaust outlet flow

Port side

Oh hell, I give up on the videos.


Watch this video on Vimeo:

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Sent from my iPhone
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Old 11-10-2015, 08:01 PM   #3
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Starboard side flow

http://s33.photobucket.com/user/love...4.html?filters[user]=9886348&filters[recent]=1&sort=1&o=1


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Old 11-10-2015, 08:09 PM   #4
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Your two photos both return errors, but never mind.

The water will be diverted to one path or the other due to the geometry of the y. But the exhaust at that point is already cooled down so that water flow doesn't matter. The exhaust gas flow splits almost equally so that the back pressure is reasonable. That is what is most important.

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Old 11-10-2015, 08:15 PM   #5
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Ok. Cool. Thanks.

I sure have trouble trying to load a video!
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Old 11-10-2015, 08:28 PM   #6
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Not really a siphon loop, but a gooseneck to prevent a following sea from swamping the outlet. The Y design might be a remnant of the boats sail origin. If motorsailing, there may be less back pressure on the windward side exhaust outlet of the leeward outlet is submerged. Also adds volume, and drains the following sea faster. Good design.
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Old 11-10-2015, 08:41 PM   #7
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Ahh, that makes sense.
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Old 11-10-2015, 09:33 PM   #8
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Is the temperature of the hose on the port side stay below 200F at full load? If yes, don't worry about it.
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Old 11-11-2015, 10:32 AM   #9
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Have not tested at full load. Will try that.
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