Sierra 18-21005K Seal & Gimbal Bearing Kit for MerCruiser Stern Drives

The Sierra 18-21005K is a premium seal and gimbal bearing kit designed specifically for MerCruiser stern drive applications. This heavy-duty replacement kit is engineered to meet or exceed OEM specifications, ensuring reliable performance and extended service life.

Key Features:

• Complete kit includes one gimbal bearing (Sierra 18-21005) and one oil seal (Sierra 18-2094)
• Greasable design allows for regular maintenance and lubrication through external zerk fitting
• Manufactured to meet or exceed original equipment requirements
• Premium quality construction for smooth and reliable gimbal system operation

Application:

• MerCruiser Alpha One Generation II (1998 and newer)
• All MerCruiser Bravo stern drives (Bravo I, II, III, X, XR, XZ)

OEM Cross-References: Replaces MerCruiser part numbers 30-862540A3, 30-862540T1, 30-862540A04, and 30-879194A01. Also interchangeable with Mallory 9-72425.

Sierra is a trusted name in marine replacement parts, delivering quality components that boat owners and marine technicians rely on for professional repairs and maintenance.