New exhaust layout

[scottnewcombe]

Posted already on pbo but thought I might get more response here. Sorry for repetition.

I've just replaced the transom on the old wooden tub. Now to bolt all the bits back together.

So here's the thing. The old exhaust set up was exhaust manifold-water injection point(below water line)-1m length of exhaust hose (50mm)-2m length of yellow(gas?)plastic pipe- straight out the back under the water line.

Now I know enough to be a bit worried to say the least about the old set up. Plastic gas pipe eh??


So.. I was thinking water lock and swan neck and exiting above the waterline.
However there is only about 350mm between the waterline and the deck level. This is not enough to get a normal type swan neck in at the transom.


So my questions are

1. exhaust outlet above or below w/l. (would like to see water pumping)

2. alternatives to swan necks.

3. any other bright ideas??


Many thanks

Scott


2.5BMC deisel 27' wooden MB


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[martynwhiteley]

Keep the gas pipe.

At least if you get a leak, TRANSCO are obliged to come and fix it for free!

(sorry but you've got to take the rough with the smooth if you post on this forum /forums/images/icons/wink.gif, then again, at least you'll get a few responses)



<hr width=100% size=1><font color=blue> Real boaters do it on the Humber </font color=blue>

 

[scottnewcombe]

I was guessing that it might cost me more to get repaired as the engineer would have to be corgi registered!

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[Eightpots]

Have a look in the Vetus book. They do a range of GRP silencers with syphon breaks for "compact" installations. Seems that the outlet was under water to act as an easy way of silencing the thing.

I've transom outlets on my boat. Without the water pressure present the starter doesn't have to work so hard pushing out the air in the exhaust system.

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[miket]

Don't mess around get the right stuff for the job.
Agree Vetus do complete systems inc' swan knecks, also Halyards.
If waterline to deck distance is problem at transom, try side outlet further forward?

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