This is the Magnum XLS 46A ABC 2-Stroke Glow Powered Aircraft Engine. FEATURES: ABC construction-Aluminum piston, Brass sleeve, Chrome plated. One piece aluminum crankcase Side exhaust Dual ball bearings Front-mounted carb with two needle valve adjustment and rear needle valve assembly. Expansion style muffler One year warranty INCLUDES: One Magnum XLS 46A ABC 2-Stroke Glow Powered Aircraft Engine with two needle carburetor with remote needle, muffler with pressure fitting two gaskets, two M3x40 hex head muffler screws and one 2.5mm allen wrench, remote needle holder with two M3x12 socket head cap screws and tubing, instruction manual, parts list and decal sheet. SPECS: Bore: .86" (22mm) Stroke: .77" (19.6mm) Displacement: (7.45cc) Practical RPM: 2000-17,500 Weight with muffler: 16oz (453g) Weight w/o muffler: 13.1oz (374g) Mounting dimensions are the same for the Magnum XLS 46A Engine Distance between mounting holes on same side: .67" (17mm) Distance between mounting holes opposite side: 1.65" (42mm) Distance between muffler mounting holes: 1.46" (37mm) Width of exhaust opening: 1.06" (27mm) Height of exhaust opening: .26" (7mm) Width of crankcase neglecting mount flanges: 1.36" (34.5mm) Width of engine with mounting flanges: 2" (51mm) Height center of crankshaft to top of engine: 2.75" (69.8mm) Overall height: 3.46" (88mm) Height bottom mounting flange/top of engine: 2.72" (69mm) Length to front of drive washer: 3.35" (85mm) Overall length: 4.49" (114mm) REQUIRES: Hot heat range glow plug, 10x5 or 10x6 break in prop, fuel with 10%-20% nitro content with castor oil lubricant. Most of the fuels we carry meet or exceed the lubricant content required for optimum performance and maximum engine life. In the past, the conventional lubricant content used in fuel was 18%. But with advanced technologies, fuels like Red Alert and O'Donnell for example, have a better quality of lubricants even though the percentage of lubricant content is lower. These high tech lubricants provide exceptional cooling and protection.