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cardude01 11-10-2015 07:58 PM

Exhaust outlet flow
2 Attachment(s)
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?)
Attachment 46420
and then Ys with one hose going to port and one to the starboard outlet.
Attachment 46421
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.

cardude01 11-10-2015 07:58 PM

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

cardude01 11-10-2015 08:01 PM

Starboard side flow[user]=9886348&filters[recent]=1&sort=1&o=1

Sent from my iPhone

djmarchand 11-10-2015 08:09 PM

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.


cardude01 11-10-2015 08:15 PM

Ok. Cool. Thanks.

I sure have trouble trying to load a video!

Northern Spy 11-10-2015 08:28 PM

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.

cardude01 11-10-2015 08:41 PM

Ahh, that makes sense.

High Wire 11-10-2015 09:33 PM

Is the temperature of the hose on the port side stay below 200F at full load? If yes, don't worry about it.

cardude01 11-11-2015 10:32 AM

Have not tested at full load. Will try that.

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