Stearns Quick-Change Oil Pump for oil changing jobs on most boats by pumping the old oil and removing sludge via your boat's engine dipstick tube. Features an extra durable molded pump housing with built-in battery storage chamber. Pump includes a variety of hoses and fittings to makes oil changes easier. Special threaded female adapter screws directly to many outdrive dipstick tubes. Never make an oily mess again when it comes to changing your engine's oil.