Solas 124B Hub KitThe Solas 124B Hub Kit offers rubber construction to prevent deterioration. The design prevents the hub from spinning in the propeller and can be reusable if the propeller is damaged. Eliminates hub chatter and vibration.Applications:Mercury/Mariner/Mercruiser225 EFI (4-Stroke) manufactured by Yamaha;15 tooth spline 4-3/4″ Gearcase