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Course Outline

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
  • Unit 4 of 6
  • Topic 8 of 19
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