Sierra 18-2100 Heavy Duty Greasable Gimbal Bearing

The Sierra 18-2100 is a heavy duty, greasable Link Belt gimbal bearing designed for inboard/outboard (I/O) sterndrive applications. This precision-engineered bearing maintains proper driveshaft alignment within the gimbal housing, which is critical for smooth operation and preventing costly damage to the sterndrive assembly.

Key Features:

• Heavy duty Link Belt construction for enhanced durability and extended service life
• Greasable design allows for periodic lubrication and maintenance to maximize bearing longevity
• Manufactured to meet or exceed OEM specifications for reliable performance
• Direct replacement for multiple OEM part numbers including MerCruiser 30-879194A02, 30-60794A4, 30-60794A2, OMC 983937, 3853807, and Volvo Penta 3853807

Compatibility:

• MerCruiser MC-1, R, MR, and Alpha One sterndrives (1974-1997)
• MerCruiser Gen II Alpha drives (1991-1997)
• MerCruiser Bravo I, II, and III sterndrives (1988-1995)
• All OMC Cobra and King Cobra drives
• Volvo Penta sterndrives: 3.0L, 4.3L, 5.0L, 5.7L, 7.4L (1994-1998), 5.8L (1994-1996), 8.2L (1998)
• MerCruiser 120HP/140HP with gimbal trim sender (serial numbers 2791957-6225576)
• MerCruiser 165HP (serial number 2763442 and up), 225S, 228HP, 233HP, and 250HP models

Regular inspection and replacement of the gimbal bearing is essential preventative maintenance for I/O sterndrive systems. A worn or failing gimbal bearing can cause vibration, noise, and potentially catastrophic damage to the drive unit if left unaddressed.