In Ohio a powerboat may not exceed established noise levels What equipment must be installed in to prevent excessive or unusual noise?

(A) No person shall operate upon the public waters of this state a watercraft equipped with a gasoline or other internal combustion engine that produces exhaust gases without the use of a muffler to effectively muffle the noise thereof. Except as otherwise provided in this section, every such muffler shall be in good working order and in constant operation.

(B) The director of natural resources shall adopt rules in accordance with Chapter 119. of the Revised Code establishing maximum noise levels for watercraft operated on the public waters of this state. Such rules shall be based upon studies and research regarding noise levels considered safe for human health.

(C) No watercraft shall be sold or offered for sale at retail in this state that is equipped with a gasoline or other internal combustion engine that produces exhaust gases without the use of a muffler to effectively muffle the noise thereof, except as otherwise provided in this section.

(D) Subsection (A) of this section does not apply to a watercraft equipped with an outboard motor that:

(1) Has a horsepower of less than six and is manufactured prior to January 1, 1986.

(2) Is manufactured, sold, and registered solely for competition use, such as racing or exhibitions, and is not normally used on public waters.

(E) Subsection (B) of this section does not apply to a watercraft that is:

(1) Used solely for agricultural purposes.

(2) Manufactured, sold, and registered solely for competition use, such as racing or exhibitions, and is not normally used on public waters.