[Blue Thunder]

Originally Posted by Wolfeboro_Baja

I don't know where you get your information, but when I bought my first boat 10 yrs ago, it had through-prop exhaust. Five years later, I inquired about getting a thru-hull exhaust installed and when I inquired about a "switchable" exhaust, I was promptly told, politely by the dealer, that those were illegal in NH and could not be installed. Who was the dealer?? Channel Marine, the same dealer that sells Crownline!! Perhaps the Crownlines you saw/heard had been modified by a knowledgeable owner??




My current boat, a Baja, has the factory-installed thru-hull exhaust and has never been modified by me or anyone else; I know because I bought this boat new. It's legal! If it's loud, perhaps the state should consider allowing a switchable exhaust, keeping the current decibel limits in place so no one gets too loud.

FWIW, my 2000 Four Winns 230H has the "Captain's Call" Exhaust feature. I bought (ordered) the boat new at Melvin Village Marina. At the time, they told me that the switchable exhaust was illegal in NH. Since I use the boat only in Maine, they ordered it for me.

Hey Skip, I swear I've read something about the switchable exhaust in an RSA that you may have posted years ago (??) Anyway, mine is VERY loud in the open position since the pipes are on the sides of the boat instead of the transom. The older I get the less I use it.

BT

Nevermind I found it:

270:25 Muffling Devices. –
I. No person shall own or operate or sell or offer for sale, within the jurisdiction of this state, a boat propelled in whole or in part by gas, gasoline, diesel, or naphtha unless the boat is provided with an underwater exhaust or other muffling device constructed and used so as to muffle the noise of the explosion. Nothing in this paragraph shall be construed to require an underwater exhaust or other muffling device on a boat that is being sold for salvage purposes.
II. No person shall own or operate, within the jurisdiction of this state, a boat equipped with a lever, cable, or other device that may be used to adjust the muffling device.
III. The provisions of this section shall not apply to antique boats or classic boats which have met the decibel levels established in RSA 270:37 and have been issued a permit exempting them from this section. For the purposes of this section ""antique boat'' means a boat built prior to 1943 and ""classic boat'' means a boat built between 1943 and 1968 inclusive.
IV. No person shall own, operate, sell, or offer for sale any boat which is capable of discharging exhaust above the water unless the boat is equipped with muffling devices.
Source. 1941, 160:1. RL 181:23. RSA 270:25. 1971, 239:1. 1981, 353:11. 1987, 370:3. 1991, 369:1. 1992, 132:4, eff. July 3, 1992. 2006, 234:1, eff. June 1, 2006.