The SeaSense Lower Unit Lube Pump fits quart bottles of lower unit lubricant and allows for mess free lube changes. Simply thread the fitting in the lower drain hole and pump until filled.• Fits any 3/8"-16 thread drain screw• Includes adapter fitting for Yamaha, Tohatsu, Honda (2-50hp), and Nissan lower units Thread the fitting in the lower drain hole & pump until filled Fits any 3/8""-16 thread drain screw Includes adapter fitting for Yamaha, Tohatsu, Honda (2-50hp), & Nissan lower units