Oh... the noise, running full throttle - SailNet Community

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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a new forum dedicated to diesel engines and their applicable accessories.


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  #1  
Old 06-29-2009
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Oh... the noise, running full throttle

hours and hours of motoring on a windless trip on Chesapeake Bay just makes me want to finally do something about the noise. (it's a universal 5416) At full throttle the boat actually slows down and a slightly slower speed on the engine works better. (no tach ) I think the hull speed is 6.5 mph somtimes the engine can get her to 7, but it just sounds like the tasmainian devil!

I've lots of fiberglass board stock laying around that I can use. (in the ac biz) I know it can be a mold collector but I have enough that I can replace it every few months. The places I plan to put it are the port laz lid, the plywood front of the engine compartment, and the starboard coffin bunk access door. I could also make a sort of bulkhead on the port side between the engine and lazerette.

The good news is, that all the motoring we did this trip (about 40 hrs +) the only problems were fuel filters.
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Old 06-29-2009
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I know you've got material on hand, but the foil-backed foam/lead sound insulation material available makes for a tidy installation, and if you put the silver foil side to the engine box you won't be absorbing spills and fumes so much. It can be glued to panels or hung as a curtain. It also won't be leaving stray fiberglass fines anywhere.

If you do use what you've got, maybe encapsulate it somehow.

btw - one of the most effective sound deadening we've ever used was to drape a dentist's old Xray blanket over the block itself! Just watch you don't block the air intake and keep it free of any moving belts/pulleys.
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Old 06-29-2009
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actually the FG board is foil on one side (it's ductboard) I like the xray blanket!
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