Great power from a very revy little 20cc engine. Snappy throttle response and a reliable idle you could set your clock by. Very good for realistic models as this much more integrated exhaust DLE-20 RA Spec. Auto Advancing Electronic Ignition. DCI RCEXL second generation 4.8 to 8.4 volts LiPo 2S. Displacement: 20 cc (1.22 cu in). Bore: 1.3 in (32 mm). Stroke: 1.0 in (25 mm). Weight: 28.9 oz (820 g). RPM Range: 1,750-9,000. Output: 2.5 hp @ 9,000 rpm. Requires: unleaded gasoline, 2-cycle oil, ignition battery & propeller Includes: electronic ignition, muffler, spark plug, gasket, bolts, throttle arm extension & manual Suggested Propellers: 14x10, 15x8, 16x6, 16x8, 17x6. Spark plug: NGK CM6