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Engine sound insulation

2486 Views 11 Replies 8 Participants Last post by  UnionPacific
My boat has sound insulation (1 inch foam sheeting with foil facing) on the bulkheads immediately surrounding the engine (Yanmar 2QM15). Not sure if it's original or PO installed, but I suspect the latter.

But the boat really doesn't have a true "engine room", so the bulkheads where the insulation is installed aren't continuous, which means that the engine is not encapsulated by insulation, and to my layman's way of thinking the sound can travel pretty much anywhere. For example, there is only a thin, uninsulated panel between the engine and quarter berth.

I removed some of the insulation to fix some wiring, and doing so made a big improvement in engine access clearances, so I'm thinking about removing it all.

Any reason I shouldn't do this, other than causing (possible) noise level increases?
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I used sound down paint and also the 1'x1'x1" tiles from Sailor Solutions .. Haven't heard my engine run yet as it's not been started but it looks like a good job at least haha! Also, check out dynomat, you can get it in larger pieces on Amazon. Has sticky backing. It's only an 1/8" thick or so. Better than nothing and the metal film may cut on some heat too.

First picture is after I painted the 5 coats of the sound paint, and the second is after I took the old stuff down and then after I put the tiles over the sound paint.


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And then I put wood slats over.. Only picture I have post slats at the moment.


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