when must a boat use a muffler

Description

https://aceboater.com/en/using-courtesy-and-common-sense

Using courtesy and common sense | ACE BOATER®
https://aceboater.com/en/using-courtesy-and-common-sense
When do powerboats need a muffler? Every boat equipped with a motor other than a stock (unmodified) outboard engine must have a muffler and use it while operating within five nautical miles (9.26 km) of shore.

https://pleasurecraftoperatorcard.info/requirement-for-mufflers-pleasure-craft/

Requirement for Mufflers – Pleasure craft – Pleasure Craft …

Requirement for Mufflers – Pleasure craft

As stated in the Small Vessel Regulations,no person shall operate a power-driven vessel, and no person shall permit another person to operate such a vessel, unless it is equipped with a muffler that is in good working order and that is in operation at all times while the vessel is in use to prevent excessive or unusual noise; or

https://www.boat-ed.com/canada/studyGuide/Mufflers-and-Engine-Shut-Off-Lines/101199_115772/

Mufflers and Engine Shut-Off Lines – Boat Ed
https://www.boat-ed.com/canada/studyGuide/Mufflers-and-Engine-Shut-Off-Lines/101199_115772/
The exhaust of every pleasure craft that is equipped with a motor must be muffled effectively while operating within five nautical miles (9.26 km) of shore. Your pleasure craft is exempt if: It has an unmodified stock outboard engine or… It was built before January 1, 1960, or…

https://www.boat-ed.com/alabama/studyGuide/Mufflers-and-Noise-Level-Limits/10100202_26183/

Mufflers and Noise Level Limits – Boat Ed
https://www.boat-ed.com/alabama/studyGuide/Mufflers-and-Noise-Level-Limits/10100202_26183/
A vessel’s engine must have a muffler or exhaust water manifold for noise reduction or another effective muffling system. The use of cut-outs or exhaust stacks is prohibited.

https://www.uscgboating.org/regulations/state-boating-laws-details.php?id=19&title=[4.3]Motorboat Noise

State Boating Laws
https://www.uscgboating.org/regulations/state-boating-laws-details.php?id=19&title=[4.3]Motorboat Noise
86 decible at back of boat . Yes . Must have installed muffler system . No . New Hampshire. Yes . stationary test-90 db prior 1/1/91, 88 db on or after 1/1/91.moving test(at 50 feet)-84 db prior 1/1/91, 82 db on or after 1/1/91 . Yes . Must be exhaust muffler or thru the water, no adjustable mufflers. No . state law . New Jersey. Yes

https://www.sbmar.com/featured-article/everything-you-need-to-know-about-marine-exhaust-systems/

Everything you Need to Know About Marine Exhaust Systems …

Everything you Need to Know About Marine Exhaust Systems

The exhaust design and/or system must fit the boat and work in such a way that water will never flood the engine, even if something fails, and the system needs to look politically correct.

https://www.performanceboats.com/threads/muffler-laws.27786/

Muffler Laws | Performance Boats Forum
https://www.performanceboats.com/threads/muffler-laws.27786/
Checked last spring, and federal regulations which should govern on the water requirements throughout the country are a muffler of some type but no mention of underwater systems. If they were required, most ferries, tourist boats, personal watercraft, etc. (including those on Lake Okanagan) would be in violation.

https://www.westmarine.com/WestAdvisor/Exhaust-System-Basics

Exhaust System Basics | West Marine
https://www.westmarine.com/WestAdvisor/Exhaust-System-Basics
Powerboats use marine mufflers, commonly made out of non-metallic materials, to contain engine noise and cool the exhaust. Mufflers are always mounted above the waterline, and usually have some sort of check valve in-line to prevent backwards water flow, which might damage the engine.

https://www.thecampfirecollective.com/blog/boater-responsibilities-and-courtesy/

Boater Responsibilities and Courtesy | Campfire Collective
https://www.thecampfirecollective.com/blog/boater-responsibilities-and-courtesy/
Keep in mind what may irritate, frighten or disrupt the people around your boat. For example, you must control the boat’s noise leve l by ensuring that the boat has a proper muffler for the engine and not cranking up the volume of your music when you’re operating close to shore! Be a courteous boater. This means that that you:

https://www.sbmar.com/articles/marine-dry-exhaust-designs-and-ideas/

Marine Dry Exhaust Designs and Ideas – Seaboard Marine

Marine Dry Exhaust Designs and Ideas

5) Dry mufflers are large, heavy, can be quite cumbersome to deal with, and get extremely hot. The bracketing to hold and support a muffler on a vessel must not only be strong, it also must not transfer heat to the surrounding support surfaces. We always leave plenty of room in this area and allow the use of draft air to cool the support brackets.