Marine engine oil changes go easier with special tools. Unlike changing the oil in a car or truck, you cant simply remove the drain plug of a marine engine and let gravity to the work. Marine engine oil is usually extracted” and the process can be challenging without the right tools. Our manual oil changer provides a low effort solution to removing oil from marine engines. By utilizing a powerful pump to create a vacuum, our manual oil changer removes the oil without having to continuously pump. Usage is easy, just insert one of the included extension tubes into your engines dipstick tube, attach extraction tubes and give the cylinder up to 15 pumps - and watch the cylinder fill up! Next, press the pressure relief valve and then pour the extracted oil into an appropriate container. System includes, foot brace, extraction tubes and garden hose adaptor. Make routine oil changes cleaner and with less effort using a West Marine manual oil changer. Key Features Extracts oil through dipstick tube Powerful pump creates a vacuum—so continuous pumping is not necessary! Can be used to remove fluids from difficult to reach areas of the bilge 2.9 quart capacity Extracts both warm and cold oilOwner's Manual