Boat Fire Extinguisher Requirements. It’s time to introduce the next important piece of safety equipment on your boat: the fire extinguisher. You are required by law to have a fire extinguisher on board if your boat has an engine and meets any of the following conditions: Your boat has closed compartments where portable fuel tanks may be stored.

Source:: https://www.boaterexam.com/boating-resources/boat-fire-extinguishers.aspx