The T-H Marine Boating Essentials Lower Unit Gear Lube Pump offers a straightforward and efficient solution for maintaining your boat's lower unit. Compatible with a wide range of outboard and stern drives, including popular brands like Yamaha, Tohatsu, Johnson/Evinrude, Honda, and more, this lower unit lube pump is designed for use with 32 oz. gear lube bottles. It features a universal fit for 3/8' - 3/16' drain screws and comes with a Yamaha/Tohatsu adapter. This essential lower unit fill tool simplifies changing gear lube, ensuring your boat's lower unit operates smoothly and efficiently. By facilitating easy and mess-free lube changes, it's an indispensable accessory for boat maintenance, enhancing the longevity and performance of your marine equipment. Enhances Lower Unit Performance: Helps maintain the efficiency and longevity of your boat's lower unit Universal Compatibility: Fits most outboard or stern drive models with a 3/8' - 3/16' drain screw Compatible Outboard Drives: Johnson/Evinrude Yamaha Nissan Tohatsu Honda Compatible Stern Drives: OMC Cobra Volvo Penta SX For use with 32 oz gear lube bottles Includes Yamaha / Tohatsu adapter