Mercury Diesel Engine Coupler Assembly 805684A2

Mercury Engine Coupler Assembly 805684A2 is an OEM drivetrain component used on select MerCruiser diesel sterndrive applications. The coupler connects the engine flywheel to the sterndrive input shaft, transferring engine power to the drive while maintaining proper drivetrain connection.

Compatible with select applications including:

• MerCruiser 530 D-TA diesel
• MerCruiser 636 D-TA diesel
• MerCruiser D7.3L diesel
• MerCruiser D7.3L D-Tronic 260
• MerCruiser D7.3L D-Tronic 300
• Select Bravo-equipped MerCruiser diesel applications

Mercury parts diagrams identify 805684A2 as the coupler assembly/hub within compatible flywheel and engine coupling assemblies. It appears in both two-stage and solid coupler configurations depending on the specific engine installation.

Because coupler configurations vary significantly between MerCruiser diesel engines, confirm the engine serial number and drive configuration before ordering.

To Confirm Compatibility: Contact our team with your engine serial number at (727) 596-5929 before ordering.