Evolution EVOE0910 .91nx nitro engine

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FeaturesSmaller size and lighter weight than typical .91 displacement engines to deliver a higher power-to-weight ratio Fits the same mounting pattern as the .61NX engine Smooth operation that's easy to tune Dual ball-bearing support for longer engine lifeOverviewThe Evolution® .91NX single-cylinder, 2-stroke glow engine is revolutionary for modelers who demand the most of their engines. This engine provides the performance of a .91-size engine in the case size of a .61-class engine, allowing you to put more power into smaller aircraft. The awesome power of the .91NX engines makes it possible to add a higher level of performance versatility to your .61-, .75- or .91-size airplanes, so that your 3D maneuvers have more punch and warbird strafing runs can reach speeds faster than you imagined possible.Evolution glow engines are engineered for hands-on modelers who believe there's no replacement for displacement. Their awesome power-to-weight ratios and smooth operation make any flying experience, be it 3D, sport or scale, the best it can be.SpecificationsType: 2-stroke airplane engineDisplacement: 0.91 cu. in. (15.00 cc)Bore: 1.09 in (27.8mm)Stroke: 0.98 in (24.9mm)Cylinders: SingleTotal Weight: 20.0 oz (570 g)Engine (Only) Weight: 15.3 oz (435 g)Muffler Weight: 4.7 oz (135 g)Crankshaft Threads: 5/16 x 24Benchmark Prop: 14 x 7 @ 10, read more