Our new and improved Engine Flush kit is a necessity for any Marine engines. Our Tablets are designed to extend the life of your engine. As well as prevent Corrosion on engine parts, Remove Salt and Mineral Deposits and most importantly protect your investment. Blue Thru's high quality dispenser allows you to easily hook up to any water hose. Within 4-5 minutes of you attaching your dispenser to your engine. The water will have turned clear and your engine flush is complete!