Making sure that your spark plug is fresh is important in a two stroke mini moto engine. You can tell a lot from the colour of the spark plug. The top part of your spark plug is covered in ceramic insulator which, when brand new is white. This part of the spark plug can change colour according to how your engine is running. The plug should appear as a nice tan colour when the engine is running perfectly, this indicates complete combustion. A greyish or white colour indicates that the engine is running too lean which can result in engine damage. In this case you should clean and check your fuel system for any obstruction, check your fuel mixture, check for loose intake manifold bolts and carburettor mounting leeks, faulty gaskets and leaking crank seals. Anywhere that your engine could potentially leek and suck in fresh air can be the source of a lean condition.
A blackened or oily spark plug indicates improper combustion and is the result of running too rich. This can be caused by too much oil in the mixture or the spark plug could be faulty and misfiring. Check the fuel mixture and replace the spark plug.
A blackened or oily spark plug indicates improper combustion and is the result of running too rich. This can be caused by too much oil in the mixture or the spark plug could be faulty and misfiring. Check the fuel mixture and replace the spark plug.
