
Yamaha 15HP Lower Unit Assembly 6B4
Upgrade or replace your damaged lower unit with this high-quality 6B4 Lower Unit Assembly, designed for Yamaha 15HP 2-stroke outboard engines. Built for dependable performance, it delivers smooth power transmission, reliable shifting, and efficient water pump operation to keep your engine running at its best. The 6B4 lower unit is commonly used on Yamaha 9.9HP and 15HP Enduro models, with different versions available for short and long shaft configurations.













