... Followed are the details of this Brush Cutter TT-BC4300. Engine model1E40F-5Engine typeSingle cylinder, air-forced cool, 2 strokeDisplacement42. ... leaves densely, if it is, should be cut size increase, reduce engine load. Fifteen: why the mower start and parking ... crankshaft rotate relatively, cause an imbalance; D, engine fixed screws loose; E, engine base damage. Twenty: set mower grass wores ...