Mercury – Rubber Bushing | Alpha One / MR / R Drive Series | Durable Marine Rubber | 99291T

Overview

Any boater who spends real time on the water knows how much the small parts matter. You feel it when the shift is smooth, the ride is steady, and the whole driveline just works the way it should. That kind of confidence comes from trusting components that quietly take the beating of every wave, every turn, and every long run back to the marina. The Mercury Marine part number 99291T Rubber Bushing is one of those pieces—simple, tough, and essential for keeping a MerCruiser sterndrive running the way it was built to run.

Key Features

• Designed to provide vibration dampening and controlled movement in MerCruiser sterndrive systems
• Constructed from durable marine-grade rubber built to handle constant load and shifting forces
• Precisely molded for a secure, tight fit in Alpha One, MR, and R drive assemblies
• Helps maintain alignment within the driveline to support smooth shifting and steady acceleration
• Straightforward installation following standard Mercury Marine service procedures

Engine & Boat Compatibility.

• Fits MerCruiser Alpha One sterndrives (1984–1991)
• Compatible with MerCruiser MR and R drive systems
• Commonly used across runabouts, bowriders, cruisers, and classic sterndrive fishing boats
• Ideal for engines and drives where correct alignment and vibration control are necessary for long-term reliability

Performance & Practical Benefits

On the water, a good rubber bushing does more than people realize. It absorbs the little shocks and twisting forces that travel through the drive every time you throttle up or shift into gear. With the 99291T installed, the drive feels tighter and more controlled, helping reduce chatter, vibration, and the wear that comes with hard use.

You’ll notice the difference on long cruising days or when you’re running through confused chop. The driveline feels more composed, and the transitions between idle and forward or reverse become smoother and more predictable. A high-quality bushing also protects downstream components—gears, mounts, and linkages—by keeping everything aligned the way Mercury intended. The rubber compound is molded to withstand years of heat, pressure, and exposure to the marine environment, giving you a quiet kind of assurance every time you trim down and head out.

Why Buy OEM

If there’s one area where cutting corners can cost you, it’s in driveline components. A genuine Mercury Marine part like the 99291T is made to exact specifications for Alpha One, MR, and R drive units—not “close enough,” but a true fit that performs reliably under real-world stress. Aftermarket bushings may feel similar at first, but they often break down faster, lose shape, or cause alignment issues over time. With OEM, you’re getting durability, consistency, and the peace of mind that comes from knowing your sterndrive will stay solid for seasons to come. It’s the practical choice for any boater who’d rather spend weekends on the water than in the shop.

FAQ

Q1: Which Mercury engines or systems does the Rubber Bushing part number 99291T fit?

It fits MerCruiser Alpha One, MR, and R sterndrives built between 1984 and 1991.

Q2: What makes this bushing different from aftermarket alternatives?

It’s manufactured to Mercury Marine’s original specifications using durable marine-grade rubber for optimal vibration control and longevity.

Q3: How do I know if this is the correct replacement?

Check your sterndrive model and serial number against your owner or service manual to confirm compatibility.

Q4: Can it be used in both saltwater and freshwater environments?

Yes. The rubber compound is built for long-term exposure in either environment.

Q5: Is installation straightforward?

Yes. Most owners can install it using standard tools by following Mercury Marine’s service manual guidance.

• Supersessions
  23-99291T, 23-99291T