This is a Saito Engines EG61TS 61cc 4-Stroke Gas Twin Engine (CC). Features includes Type: 4-stroke Airplane. Displacement: 3.72 cu. in. (60.9 cc). Bore: 1.46 in (37.2 mm). Stroke: 1.10 in (28.0 mm). Cylinder Type: Ringed, Chromed Aluminum. Cylinders: Twin. Plug Type: CM-6 spark plug. Total Weight: 83.2 oz (2360 g). Engine (Only) Weight: 73.7 oz (2090 g). Muffler Weight: 3.53 oz (100 g). Ignition Weight: 6.00 oz (170 g). Crankshaft Type: Threaded. Crankshaft Threads: M10 x 1.25 mm. Muffler Threads: M14 x 2 mm. Prop Range: 21 x 10 - 23 x 11. RPM Range: 1,500 - 7,400 rpm. Recommended Fuel: 87-93 Octane. Oil Type & Content: 20:1 gas/oil ratio. Muffler Type: Flexible tube (included). Starter Type: Bump. Carb Type: Walbro/Saito. Manufacturer: Saito Engines Model Number: EG61TS Category 1: Other Toys Category 2: Radio Control Toys

This is a Saito Engines EG61TS 61cc 4-Stroke Gas Twin Engine (CC). Features includes Type: 4-stroke Airplane. Displacement: 3.72 cu. in. (60.9 cc). Bore: 1.46 in (37.2 mm). Stroke: 1.10 in (28.0 mm). Cylinder Type: Ringed, Chromed Aluminum. Cylinders: Twin. Plug Type: CM-6 spark plug. Total Weight: 83.2 oz (2360 g). Engine (Only) Weight: 73.7 oz (2090 g). Muffler Weight: 3.53 oz (100 g). Ignition Weight: 6.00 oz (170 g). Crankshaft Type: Threaded. Crankshaft Threads: M10 x 1.25 mm. Muffler Threads: M14 x 2 mm. Prop Range: 21 x 10 - 23 x 11. RPM Range: 1,500 - 7,400 rpm. Recommended Fuel: