Yamaha - Lower unit assy - 67C-45300-14-8D Yamaha-F15-2003 Cheap aftermarket versions often use

Cheap aftermarket versions often use thin rubber or weak connectors that can leak or fail under pressure

A quick rinse now and then keeps it looking good

This genuine OEM thermostat slots into the cylinder-head housing and reacts the instant coolant creeps past spec

• Precision Gear Tooth Design – Delivers smooth engagement and efficient power transfer through the drivetrain

4 ft | 688-8258A-50-00

Yamaha - Lower unit assy - 67C-45300-14-8D Yamaha-F15-2003 Cheap aftermarket versions often useYamaha Lower Unit Assembly Complete Drive System 67C 45300 14 8D Overview The lower unit assembly is a critical component of your Yamaha outboard, designed to transfer engine power to the propeller while ensuring smooth gear engagement and reliable propulsion. Built with precision and high quality materials, this assembly delivers excellent durability and resistance to corrosion, making it ideal for demanding marine environments. Manufactured to OEM