Yamaha F250-F350 4.2L Lower Unit | SE423 | 25″ 30″ Shaft

Power your offshore adventures with this Premium Aftermarket Replacement gearcase, specifically engineered for high-displacement Yamaha 4.2L V6 engines. This unit is the ultimate solution for owners of F250, F300, and F350 models looking for OEM-level performance without the factory price tag.

High-Displacement Ready: Built to handle the massive torque of 4.2L Yamaha engines, ensuring smooth power delivery and durability.

Superior Thermal Management: Features a water-cooled bearing carrier and dual-side water intakes for maximum cooling efficiency in demanding saltwater environments.

Professional Grade: Arrives fully assembled, pressure-tested, and pre-filled with premium gear lube for a true “bolt-on” installation.