What you want to know is "did you lose battery voltage indication" when the clutch disengauged? Keep this in mind, speed variations on mowers with an electric clutch is not an indication of a bad clutch. Engine Air Filter, Engine Oil And Filter Use regular unleaded gasoline with an octane rating of 87 or Attach the oil drain hose, furnished with the unit, to the oil higher. A good anti seize compound would be recommended. All prices, descriptions, and specifications subject to change without notice. Each of the connectors has a locking tang that has to be released before it can be pulled out of the plastic housing.