It's the Law

Mufflers and Noise Level Limits

Vessel operators may not hear sound signals if the engine is not adequately muffled.

The exhaust of every internal combustion engine on any vessel must be effectively muffled. That is, the engine’s exhaust must be muffled or suppressed at all times so as not to create excessive noise.

It is unlawful to operate a vessel that exceeds a noise level of 86 dBA.

The use of cutouts is prohibited.