A. Every motorboat shall at all times be equipped with a functioning underwater exhaust or a muffler in good working order and in constant operation to prevent excessive or unusual noise. No person shall use a muffler cutout, bypass, or similar device upon a motorboat.

B. No person shall try to test or otherwise operate a motorboat which is equipped with cutouts or open exhaust stacks.

C. Carburetors on all engines of motorboats, other than outboard motors, shall be fitted with a U.S. Coast Guard approved device for arresting backfires.

D. No motorboat shall exceed a sound level of 75 decibels when measured from a distance of 50 feet or more. [Ord. 8655 § 3(H), 1978].