RedactedNarrative: Once boat was on plane operator cruised at a speed of 25mph.  After cruising for a good 5 minutes the steering wheel all of a sudden jerked really hard to the left.  The boat turned around almost a complete 180 degrees.  Operator noticed no power, all electronics no longer worked.  Operator then looked up and saw the cover of the motor floating about 10 to 15 yards away.  At that point they thought the motor cover just snapped off the motor somehow but when they turned around to the back of the boat they realize that the motor had snapped off the motor mount/bracket.  At that point they called the Coast Guard and the tow company towed them back to shore.