The Shoreline Marine Lower Unit Lube Pump is a convenient tool for keeping your boat's outboard motor properly lubricated. It fits standard quart bottles and comes with an adapter for Yamaha outboard motors. It's specifically designed for use with domestic O/B and I/B motors, but adapters are available for imported motors. This pump helps you easily and cleanly transport lubricant to your engine, ensuring that it runs smoothly and safely. Proper lubrication is crucial for maintaining the health of your boat's engine.