Drivesaver Coupling (January 1991)

This coupling was installed to reduce engine/drivetrain roughness. It turns that the root cause of the “roughness” was discovered later. See The Great  Muffler Mystery (5/1993). The coupling consists of a soft plastic disc that is bolted to the engine flange. The disc has captive nuts to accept the bolts that are inserted through the driveshaft flange. This isolates the engine and driveline vibrations.

This coupling did reduce the roughness somewhat and is still in use on the boat.