This is the DLE 60cc Twin Cylinder Gasoline Engine. FEATURES; Horizontally opposed twin cylinders for low vibration operation Aluminum alloy crankcase Electronic ignition for simpler starts, higher performance and minimal RF noise Two year limited warranty through Hobby Services beginning at date of purchase INCLUDES: DLE 60cc Engine Electronic ignition NGK CM6 Spark plug Two Pitts style mufflers Engine stand-offs REQUIRES: Gasoline with at least 87 octane rating 2-cycle oil, mix ratio for this engine is 30 parts gas to one part oil and must be followed exactly for warranty consideration and optimum performance 4.8 - 12V battery for ignition (separate receiver style pack can be used) (LiPo & LiFe requires voltage regulator) Propeller: 22x10, 23x8, 23x10, 24x8 Field equipment SPECS: Displacement*: 61 cc (3.7 cu in) Bore*: 1.42 in (36 mm) Stroke: 1.18 in (30 mm) Weight, engine: 4.37 lb (1.56 kg) Weight, muffler: 2.82 oz./ 3.00 oz./(80 g/85 g) Weight, ignition module: 7.44 oz. (211 g) Output: 5.5 hp @ 8,500 RPM Static Thrust: 15.2kg Pulling Force/100 meters altitude 13.5kg Pulling Force/1,800 meters altitude Gasoline/Oil Mixture: 30:1 Gasoline Octane Rating: 87 Recommended Propellers: 22x10, 23x8, 23x10, 24x8 Carburetor Adjustments; Low Speed Needle: 1.5 turns out as a starting point, adjust for a smooth idle and a reliable transition to high throttle High Speed Needle: 1.5 turns out from closed, adjust needle to peak RPM, if engine slows or dies at full throttle, the high-speed mixture is likely too lean Muffler Length: 5" (128mm) Muffler Diameter: 2" (50mm) Exhaust Outlet Length: 3.4" (85.5mm) Exhaust Outlet Diameter: 0.79" (20mm) Distance Between Mounting Hole Centers Same Side: 2.7" (69mm) Distance Between Mounting Hole Centers Opposite Side: 2.7" (69mm) Width from Cylinder Head to Cylinder Head: 8.5" (215mm) COMMENTS: *Note: The displacement and bore values have not yet been confirmed. 7/11/12 pjw jxs 09/24/12 ir/jxs