Quicksilver 8M0168577 Bearing Carrier Retainer Nut

The Quicksilver 8M0168577 is an OEM bearing carrier retainer nut designed for MerCruiser stern drive lower units. This critical component secures the bearing carrier assembly in place within the lower unit gearcase, ensuring proper alignment and operation of the drive system.

Key Features:

• Genuine Mercury Marine/Quicksilver OEM quality construction
• Secures bearing carrier within the lower unit to maintain proper gear alignment
• Prevents bearing carrier movement during operation for reliable performance
• Castellated design with locking tab washer compatibility for secure installation
• Precision-engineered to exact factory specifications

Applications:

• MerCruiser Alpha One Gen I and Gen II stern drives
• MerCruiser Bravo I, Bravo II, and Bravo III stern drives
• Mercury outboard lower units (105-300 HP models)

Cross-Reference Part Numbers: Replaces Mercury/MerCruiser part numbers 79448, 8M2011027, 8M2000347, 35912, 52834, 818763T11. Also cross-references with Sierra 18-3751 and 9-72155. Installation requires specialized bearing carrier retainer nut wrench (91-61069T, sold separately) and proper torque specifications per service manual.