Buck Algonquin Shaft Coupling 50-MCY004

4" Buck Algonquin Solid Propeller Shaft Coupling for Yanmar Marine Transmissions.

The Buck Algonquin 50-MCY004 Solid Shaft Coupling is engineered specifically for Yanmar marine transmissions, providing a rigid and accurate connection between the transmission output flange and propeller shaft. With a 4" flange diameter, this coupling is ideal for inboard propulsion systems requiring precise alignment and consistent power transfer.

Its solid one-piece construction ensures maximum strength and minimal flex, making it well-suited for permanent installations where long-term reliability is critical. Precision machining helps reduce vibration and maintain smooth drivetrain operation under load.

Constructed from high-strength ductile iron and machined to strict marine tolerances, the 50-MCY004 ensures reliable power transfer, proper shaft alignment, and long service life in demanding inboard applications.

Coupling dimensions

• Flange Diameter: 4"
• Shaft Range: 3/4" Thru 1-3/8"
• Pilot Diameter: 1.966" x 5/32 Male
• Bolt Circle: 3.070"
• Bolt Diameter: 10mm
• Coupling Length: 2-1/4"
• Bolts: 4 (New flange bolts included)