R & D Flexible Shaft Coupling f/4" Yanmar - 3HP/100RPM Capacity

The R & D Flexible Shaft Coupling for 4" Yanmar is a crucial component for small marine propulsion systems that operate at modest RPM ranges. This coupling connects the engine output shaft to the transmission or propeller shaft, effectively absorbing vibrations and accommodating minor misalignments that occur during engine operation and hull movement.

Designed specifically for Yanmar industrial engines in the 3-horsepower class, this coupling ensures smooth power delivery and prolongs the service life of both the engine and drive system. It features flexible elastomer inserts that dampen torsional shock and reduce noise transmission through the hull. The coupling is rated for a maximum speed of 100 RPM, making it suitable for typical trolling, auxiliary, and light-duty propulsion duty cycles.

Boaters with Yanmar auxiliary engines, commercial fishing boats, or small displacement sailboats with auxiliary power will find this coupling particularly beneficial due to its proven durability. Whether replacing a worn OEM unit or building a new drivetrain, this coupling is designed to enhance reliability in remote waters or during extended cruising.