Question

Ba-6 what does an automatic cut-off lanyard do when properly attached to a pwc operator

Answer 1

It stops the engine when the operator falls overboard.

Answer 2

On a PWC, the lanyard or the short cord that fastens and secures rigging, is attached to the ignition safety switch and the operator's wrist or life jacket.

The automatic cut-off lanyard stops the engine when the operator falls overboard, or out of the powerboat, or is otherwise thrown from the proper operating position.