Engine Description 2.1 Model The engine serial number is stamped on the crankcase ( arrow ) as well as the rating plate. © 34 570 0 © 34 571 0 © 34 572 0 2.1.2 Position of the Rating Plate 2.1.3 Engine Serial Number The rating plate C is attached to the crankcase. Depending on the model, a second rating plate may be affixed to the air duct hood. The model A , the engine serial number B and the performance data are stamped on the rating plate. The model and engine serial number must be given when ordering parts. 2.1.1 Rating Plate © 2001 2