Auto fuel line is not USCG APPROVE, and you risk a fire and liability in your boat. Marine fuel supply line is has reinforce steel, impregnated into IT.(like a radial tire). Fuel vent line i believe is not, but that is also USCG approved. New fuel line from tank to engine does not appear to be USCG APPROVED, JUST EPA for the ethanol fuel. hope this helps,
		 
		
		
		
		
		
		
		
		
	
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