Show TO STOP STRIKING STRIKING VALVES As a a. gEm general ral thing the valve alvo stems need no lubrication If they stick be because because cause of ot carbon deposits they may b be cle cleaned ned by injecting keres kerosene ne Into the theair theair air valve air valve of ot the carburetor while the engine is running lunning Some of ot the kerosene kerosene kero lero sene will pass down the valve stem and soften and wash off the carbon A mixture mix mix- tute ture of ot one half kerosene and on one half alt lubricating oil may be squirted on the valve stems stema |