GENERAL SERVICE INFORMATION Engine Coolant 12/05 ENGINE COOLANT WARNING! Fire Hazard. Coolant may be flammable under certain conditions. NEVER allow coolant to come into contact with hot surfaces or insulation material. CAUTION! Exposure Hazard. Wear protective rubber gloves and eye protection when handling Long Life Coolant Antifreeze. Flush eyes and exposed skin with water immediately after contact. Engine Coolant Specifications Note: In the U.S., LLC is required for the warranty to be valid. NOTICE: Following the manufacturer’s recommendations, use a proper LLC which will not have any adverse effects on the materials (cast iron, aluminum, copper, etc.) of the engine’s cooling system.
Engine Coolant Mixture NOTICE: ALWAYS add LLC to soft water – especially when operating in cold weather. NEVER use hard water. Water should be clean and free from sludge or particles. Without LLC, cooling performance will decrease due to scale and rust in the coolant system. Water alone may freeze and form ice; it expands approximately 9% in volume. Use the proper amount of coolant concentrate for the ambient temperature as specified by the LLC manufacturer. LLC concentration should be a minimum of 30% to a maximum of 60%. Too much LLC will decrease the cooling efficiency. Excessive use of antifreeze also lowers the cooling efficiency of the engine.
NEVER mix different types or brands of LLC, as a harmful sludge may form. Mixing different brands of antifreeze may cause chemical reactions, and may make the antifreeze useless or cause engine problems. Remove scale from the cooling system periodically by flushing the system. © 2009 Yanmar Marine International BY Service Manual 3-19