Perfect OEM Replacement & Compatibility -- Fits Mercruiser / Mercury Alpha One Gen II, Bravo & Blackhawk U-Joint Bellows. Directly replaces OEM part #91-818162 for a reliable and correct fit.

Damage-Free Ring Seating -- Designed to seat the aluminum retainer ring evenly and securely into the bellows groove—prevents twisting, misalignment or damage. Ensures a tight seal to avoid leaks and premature wear.

High-Quality Machined Material -- Precision Integrated processing, High quality PETG material, built for durability and resistance to corrosion. Premium machining ensures consistent performance from first use.