Backpack Blower (PB-411) - 39.7 ml 2-stroke, 1-cyl engine. 7000-7600 rpm, NGK BPM-8Y 0.65 mm spark plug. 38 x 35 mm bore, 684 g flywheel. 330 x 440 x 440 mm, 9.7 kg. 1.5 L fuel tank, runs on 50:1 gas+oil (?15 % MTBE) with Echo 2-stroke 89 octan oil. 2003 Echo model.