It's a common misconception that boats don't need coolant, but the truth is that they actually do. Just like any other type of vehicle, boats require coolant to keep their engines running properly. Coolant helps to regulate the temperature of the engine and prevents it from overheating. Without coolant, your boat's engine could overheat and seize up, which would be a very costly repair.
So, if you're wondering whether or not your boat needs coolant, the answer is yes! Be sure to check your boat's cooling system regularly and top off the coolant as needed. This will help to keep your boat's engine in good shape and prevent expensive repairs down the road.