571—37.2 (462A) Flame arrester required. All motorboat engines, except outboard engines, shall be equipped with an efficient flame arrester, backfire trap or other similar device.
An acceptable flame arrester shall have one of the following markings:
	  1. 	 U.S. Coast Guard approval number.
	  2. 	 Complies with UL 1111 per tests by (name of testing facility).
	  3. 	 Evidence of compliance with the standard shall be indicated by the marking SAE J-1928 with the word MARINE arranged in a suitable manner.
This rule is intended to implement Iowa Code section 462A.3.