RPS Greasable Sterndrive Gimbal Bearing 30-60794A4 — Replaces MerCruiser/OMC/Volvo, Restores Drive Alignment

RPS 30-60794A4 is a greasable sterndrive gimbal bearing engineered to replace worn housings on MerCruiser, OMC and Volvo Penta applications where a zerk grease fitting is present.

This gimbal bearing from RPS is a direct-fit aftermarket replacement designed to restore proper engine-to-drive alignment and allow routine lubrication through a grease zerk. It cross-references multiple OEM numbers (including Mercury/MerCruiser 30-60794A4 and OMC 983937) and aftermarket part lists such as Sierra and GLM, so it’s suitable for many Bravo, Alpha, Cobra, King Cobra and Volvo SX sterndrives when the service interval or failure indicates bearing replacement.

How do I confirm this bearing fits my sterndrive?

Check the OEM part number stamped on your original bearing or consult your engine/drive serial and model information. Verify compatibility with the listed cross-reference numbers and confirm your transom has a grease zerk for this greasable design.

• Compare to Mercury/MerCruiser 30-60794A4 (and related interchange numbers).
• Matches OMC 983937 and Volvo Penta 3853807 interchange data.
• Used on MerCruiser Alpha (Gen 1 & 2), Bravo, OMC Cobra/King Cobra, and Volvo SX drives.
• Requires existing grease zerk fitting in transom for proper lubrication.

What problems does replacing the gimbal bearing solve?

Replacing a worn or failed gimbal bearing reduces driveline vibration, restores alignment between engine and lower unit, and prevents premature wear of U-joints or couplings. Fresh bearing surfaces and correct clearance help maintain smooth power transfer and quieter operation.

• Eliminates play and misalignment that cause noise and vibration.
• Prevents accelerated wear of universal joints and couplers.
• Allows scheduled greasing to extend service life when installed correctly.

How is the RPS greasable bearing installed and serviced?

Installation follows standard sterndrive service procedures: remove drive, replace gimbal bearing in housing, reassemble and torque to manufacturer specs. Because this is the greasable variant, connect and use the transom grease zerk to apply marine-grade grease at recommended intervals.

• Install with drive removed and supported per OEM instructions.
• Use correct tools and torque values for fasteners and couplings.
• Lubricate through transom zerk using marine grease after installation and during routine maintenance.

What should I check before ordering this replacement part?

Confirm the exact OEM number, examine the serial/model of your engine and drive, and ensure your transom accepts a greasable bearing style. If your setup lacks a zerk fitting or uses a different OEM variant, choose the correct non-greasable or alternate cross-reference part.

• Verify OEM numbers (30-60794A4, 30-60794A2/B4, 30-879194A02 listings) before purchase.
• Confirm compatibility with Sierra 18-2100 or GLM/Mallory equivalents if needed.
• Ensure transom has grease zerk for routine lubrication of this part.

Who is this for: Boat owners, marine technicians and DIY mechanics who maintain MerCruiser, OMC or Volvo Penta sterndrives and need a greasable gimbal bearing replacement. It’s aimed at vessels that require OEM-equivalent fit and the ability to service the bearing via a transom grease fitting. Always cross-check model numbers, drive type and serial range to ensure correct selection before installation.