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post #1 of 4 Old 08-14-2008 Thread Starter
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noise and water mufflers

I'm pretty happy with my universal 5416 now. But, I would like to reduce engine noise. The existing water Muffler is round, pretty small. Before I go and start adding insulation (mildew and moisture problems with that) to the engine compartment, is it wise to change to a different water muffler someday? Most engines I've seen in the same HP range seem to have larger rectangular water mufflers. (16 hp)
I may try some fiberglass duct board just to see it if helps. If so.. I'll get some "marine" sound proofing material It just seems like water mufflers that really aren't very expensive may be a simple choice. Thoughts on this anyone?
thanks in advance!

correction. "waterlift muffler" top in top out 1.5" hose. I was looking at centex's site for information also

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
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Last edited by deniseO30; 08-14-2008 at 11:19 PM.
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post #2 of 4 Old 08-15-2008
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I added a Vetus water muffler to my existing 'lift' and was satisfied with the noise reduction, FWIW.

The other thing you can think about is getting one of the baffled air intakes. I know this sounds strange, but the intake noise in the engine room is generally more obnoxious than the exhaust noise. Racor makes one, and I found it at Jamestown distributors. I think the one on the Phasor is made by Nicholson, but I'm not sure about that.

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post #3 of 4 Old 08-15-2008 Thread Starter
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Gary, now that you mention it.. your right the intake is very noisy!
thanks!

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
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post #4 of 4 Old 08-15-2008
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I agree with the posts re the intake.

On the exhaust side, a fairly recent trend is to add a cooling water separator. The separator will help to remove the "whooshing" sound created as the cooling water surges through the exhaust system. After the cooling water has done it's job it is separated out in a device that resembles a muffler. The exhaust then exits mostly dry and the cooling water is drained off to a outlet just below the water line.
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