Mufflers

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

• All vessel engines must have a factory-installed muffler or exhaust water manifold for noise reduction, or another effective muffling system.
• You are prohibited from:
  • Using cutouts
  • Removing mufflers or muffler baffles
  • Cutting or punching holes in mufflers
  • Modifying the original muffler or muffling system in a way that increases the noise level