Re: [OMC-Boats] Insulating engine

My engine compartment came lined with a thin black foam that has mostly
deteriorated over the years. It helps dampen some of the higher frequency
noise (foam would need to be a lot thinker to attenuate low frequency
noise), but the front of my hatch is vented to allow air in-flow. I took it
off the top of the hatch after it started falling because I was afraid it
might restrict airflow (at best) or small foam pieces might get sucked in
(at worse). Foam board probably wouldn't help a lot as its too dense to
absorb much, but auto matting (fiber hood or floor liner) or something
similar would help a little. Just be careful not to restrict any airflow --
even though the engine is water-cooled, the battery, alternator, etc. still
depend mostly on air-cooling. Hotter intake air will also cause you to lose
power (though probably not enough to notice except maybe top end).

Andy

----- Original Message -----
From: "Justin DeSantis" <duc1098desmo@...>
To: "Evinrude & Johnson Boats of the 1960's and 70's"
<omc-boats@...>
Sent: Wednesday, September 09, 2009 9:44 PM
Subject: [OMC-Boats] Insulating engine

> Has anyone added insulation to the inside of the doghouse and engine
> cover? I'm thinking of adding some foam board to cut down on the
> engine noise a bit. Just wondering if it would have adverse effects?
> Would it cause the engine to overheat or anything?
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Received on Wednesday, 9 September 2009