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Originally Posted by NHBUOY
...IS308...not so sure about not being able to use the switchable exhausts on "quiet mode" at ONLY headway speed...that is simply not true...what makes you think that.?..just curious...re:aps...he is what he isn't...  ... |
They are recommended for low RPM use only. It is simply untrue for anyone to think you can simply switch these at wide open or even half throttle. Corsa recommneds nothing over 3000 RPM's.
In the loud mode your boat still has to be at the required legal decibel level so how does a below water noise baffling system make your boat louder??...
Here is a good explanation about HB 441 from a local boating enthusiast...
“I hope I can explain what these systems do in very plain terms for you to better understand the merits of this bill.
Currently there are two types of exhaust:
Thru-Hub - or below the water line (very quiet)
Thru-Hull - or above the water line (where exhaust can be heard)
There are many different style boats with both types of exhaust systems. Some of which have to have above water, or thru-hull, systems or else it could cause damage to the engine.
Currently there are restrictions in place on the decibel limits or "noise limitations" as to the maximum decibel these boats can emit.
In no way does HB 441 look to adjust these noise limits.
To help make boats quieter, that have this above water exhaust, there are systems that can be purchased or even come standard with boats that quiet the exhaust at low RPM's or speeds. These systems are referred to as "switchable exhaust systems".
This allows the boat owner to, in essence, turn down the noise when going at slow or idle speeds. This benefits everyone on the shoreline and even those on other boats when in a congested environment.
Currently there is a law that bans these systems from NH. They were originally banned because it was thought that one could have a boat that exceeded the noise statutes and when they saw a Marine Patrol unit, they could simply turn the exhaust off at higher speeds causing enforcement issues. This is completely untrue. In doing so, you could potentially cause catashropic failure to the unit and even the boats engine.
In no way does this bill make a boat that is currently "illegal" under the current RSA,. legal It simply allows to make a boat (that is already legal) quieter which in turn improves the enjoyment of everyone around and on the shoreline.
This bill has been written in conjunction with the Dept. of Safety to make sure there are no enforcement problems and has overwhelming support out of the House.”
Hope this helps!
Dan