... Guide Bar,Air cooled Gasoline Engine Chain Saws, 52cc,2.2kw,20 inch Guide Bar,Air cooled Gasoline Engine engine ... typesingle cylinder air-cooling 2-strokedisplacement 52cc ignition systemCDIfuel mixturegasoline25:two-cycle oil 1fuel ... engine speed11,000rpmoil feeding systemautomatic pump with adjustersaw chain pitch0.375(in)saw chain gauge0.058(in)guide bar size18" ...