Jabsco Flat Tank Economy Premium Marine Oil Change System This Jabsco Premium Marine Oil Change System simplifies the engine oil changing process. This compact self-contained unit has a self-priming diaphragm pump with a easy-pour spout and cap for emptying. This marine oil change system draws oil through the dipstick using 12V of power. The unit stores easily and stands upright or lies flat. It works best when the oil is at operating temperature. Features Self-Contained Unit Self-Priming Run Dr