№ Part Number Description Part count in models 7601.1000016 Engine with clutch and gearbox assy (Unit/Part is not on the picture) ------1---- 7601.1000016-01 Engine with clutch and gearbox assy (Unit/Part is not on the picture) -------1--- 7601.1000186 Engine assy (Unit/Part is not on the picture) ------1---- 7601.1000186-01 Engine assy (Unit/Part is not on the picture) -------1---