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93 MAINTENANCE Spark Plugs Normal Spark Plug combustion deposits. The electrodes are not burned or eroded. This indi- cates the proper type and heat range for the engine and the service. Tip: The tip should not be white. A white insulator tip indicates overheating, caused by use of an improper spark plug or incorrect carburetor/throttle body adjustments. Wet Fouled Spark Plug end. There may be a carbon layer over the entire nose. Generally, the electrodes are not worn. General causes of fouling are excessive oil or use of non-recommended injection oil. Spark Plug Removal and Replacement 1. Remove the spark plug cap. spark plug counterclockwise to remove. 3. Reverse the procedure for spark plug installation. |