Evolution 91NX Single Cylinder Glow Engine

The 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. And they all benefit from ball bearing-supported crankshafts and the proven durability of ABC cylinder construction (aluminum cylinder with brass, chrome-plated liner).

• Smaller 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 and ABC construction for performance and longer engine life

• Fuel Type: Glow
• Cylinders: Single
• Displacement: 0.91 cu. in. (15.00 cc)
• Type: 2-stroke airplane engine
• Bore: 1.09 in (27.8mm)
• Stroke: 0.98 in (24.9mm)
• Cylinder Type: ABC
• Plug Type: GP1 plug
• Total 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 24
• Benchmark Prop: 14 x 7 @ 10,700 rpm
• Prop Range: 13 x 7 - 15 x 6
• RPM Range: 2,000 - 15,000 rpm
• Fuel: 10-30% nitro fuel
• Oil Type & Content : 16-18% oil
• Muffler Type: Expansion chamber