Mufflers and Noise Level Limits

All vessel engines must be equipped with an effective, permanently installed muffling system that cannot be bypassed. Excessive noise could prevent a vessel operator from hearing signals and voices.

• Vessels built before January 1, 1995, must not exceed 90 dB(A) using the stationary test.
• Vessels built on or after January 1, 1995, must not exceed 88 dB(A) using the stationary test.
• While operating on lakes and rivers wider than 500 feet, it is unlawful to exceed 75 dB(A) as measured from shore.

Contact your local sheriff’s department for a free screening of your vessel’s noise.