... engine 5.2-stroke,1-cylinder backpack brush cutter 1, two stroke engine fuel (# 90 above), oil, sae30. Xinji idle break ... each use check the oil oil level.2, the two stroke engine air for work, the crankcase temperature cannot exceed 90 degrees ... .5, non-professional personnel shall not adjust the carburetor.6, air cleaner filter often should check, change regularly. Dirty filter with ...