Quote:
Originally Posted by OCDACTIVE
I believe the statute is 93 dcb. (hopefully someone knows it off hand) Most above water exhaust boats have either internal or clamp on external mufflers that keep it below the decible rating. If a boat has no mufflers at all and straight through hull exhaust it is very very apparent.
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According to NH BoatEd it is 88dB for engines manufactured after Jan 1991, 90dB for engines manufactured prior to this date. This is for stationary testing. The moving test ("A" scale, whatever that means) at 50 feet drops it to 82dB
http://boat-ed.com/nh/handbook/engequip.htm
I had it in my head that it was 86dB for some reason, glad I looked it up especially since my twin 4 stroke Honda outboards make so much noise...
Having been a past Baja owner with switchable exhaust, I find it crazy that it is outlawed, especially if when set on thru-hull it is already at a legal limit without having to divert down through the prop, which mine was.