Marine Shaft Couplers & Flexible Couplings for Reliable Drivetrain Performance

Marine shaft couplers are essential components that connect your engine to the propeller shaft while absorbing vibration, reducing noise, and compensating for minor misalignment. At CLR Marine, we offer a complete selection of R&D Marine flexible shaft couplers engineered for durability, smoother operation, and long‑term drivetrain protection.

These flexible couplings help absorb angular, parallel, and axial misalignment, protecting your transmission, shaft, and bearings from unnecessary stress. Our inventory includes 4", 5", and 6" couplers designed for popular marine transmissions including Yanmar, Hurth, B/W, Volvo, and Twin Disc. With horsepower capacities ranging from 3HP to 28HP per 100 RPM, these couplers are ideal for small to mid‑size marine engines.

Whether you’re replacing a worn coupling, upgrading for smoother performance, or outfitting a new drivetrain, CLR Marine provides high‑quality, marine‑grade couplers that enhance reliability and reduce vibration throughout your propulsion system.

Why Choose Our Marine Shaft Couplers?

• Designed to absorb angular, parallel, and axial misalignment
• Reduce drivetrain vibration for smoother, quieter operation
• Protect transmissions, bearings, and shafts from premature wear
• Available in 4", 5", and 6" sizes for multiple engine/transmission models
• Compatible with Yanmar, Hurth, B/W, Volvo, and Twin Disc systems
• Horsepower capacities from 3HP to 28HP per 100 RPM
• Includes flexible couplers and Volvo split half couplers
• Manufactured by R&D Marine, a trusted leader in marine drivetrain components

FAQs

1. What does a marine shaft coupler do?

A shaft coupler connects the engine to the propeller shaft while absorbing vibration and compensating for minor misalignment, helping protect the drivetrain from stress and wear.

2. How do I choose the right shaft coupler for my boat?

Match the coupler size (4", 5", or 6"), bolt pattern, and horsepower rating to your engine and transmission model. CLR Marine offers options for Yanmar, Hurth, Volvo, B/W, and Twin Disc.

3. What is the difference between a flexible coupler and a split half coupler?

Flexible couplers absorb vibration and misalignment, while split half couplers (such as Volvo models) clamp directly onto the shaft and are used for secure, precise shaft‑to‑flange connections.