Ohio Rev. Code § 1547.28: Backfire flame control device.

Every gasoline engine installed in a vessel after April 25, 1940, except an outboard motor, shall be equipped with an acceptable device to control backfire flame. The device shall comply with all of the following:

(A) Be securely attached to the air intake with a flame-tight connection;

(B) Be in proper working order;

(C) Be coast guard approved or comply with either SAE J1928 or UL 1111;

(D) Be marked to indicate approval or compliance under division (C) of this section.