Exhaust Extensions

[eze2bme]

Don't get me wrong, I love the sound of my 6-71Ns ... but trying to talk while idling along sitting on the aft deck (1979 43 DC) is a bit difficult to the noise.

There is a 6-71N equipped tour boat at our marina that has side exhausts about midships that turn down into the water ... down about 1 foot below the water level and have a 45 degree angle towards the stern. When it's running all you hear is the bubble bubble of the exhaust. The boat has been this way since it was built 44 years ago and seems to have had no adverse effects on the engines.

This is for the diesel experts ... could I put a 45 degree turn down extension on my exhaust ports? They currently exit straight out the transom and the bottom of the exhaust tube is about 1 inch below the water level. This would put the exhaust into the water while idling along.

The only thing I don't like about this is that I can't see the water coming out of the exhaust ... which is the first thing that I check after start up.

Any thoughts would be appreciated.

 

[REBrueckner]

I'd vote to place the crew on the aft deck and have the captain at the flybridge!! I wonder if a 45 degree elbow to the outside, rather than down, would reduce the noise enough?? There have been prior threads on this issue...try a search for at least background ideas...

I could not find the prior thread, but I know it's here!!!!!

Found it: EXTERIOR EXHAUST ELBOWS, 12-24-2006