2013 Ducati Monster 696 Owners Manual - Page 156

Spark plugs are essential to smooth engine running and should be checked at regular intervals. This is a relatively simple operation and provides a good indication of how well the engine is running. Pull the spark plug caps off the spark plugs and remove the plugs from the cylinder heads using the wrench supplied in the toolkit. Check the color of the ceramic insulator around the central electrode: a uniform light brown color indicates good engine condition. If the insulation is any other color, or if there are dark deposits, replace the spark plug and describe the condition of the old plug to a Ducati dealer or Authorized Service Center. Also check the central electrode; if it is worn or glazed, replace the spark plug. Check the distance between the electrodes, which must be: 0.03÷0.04 in (0.7÷0.8 mm). Cleaning and replacing the spark plugs 0,7÷0,8 mm (0.03÷0.04 in) Fig. 119 If adjustment is required, bend the side electrode carefully. A gap outside the specified limits will adversely affect engine performance and may lead to difficult starting or erratic idling. Thoroughly clean the electrode and insulation using a wire brush, and check the condition of the gasket. Carefully clean the seat in the cylinder head and be careful not to let any foreign material fall into the combustion chamber. 155 Important