- Output Power: 2.5 HP at 8,500 RPM
- Idle Speed: 1600-1800 RPM
- Typical RPM Range: 1600-9000
- Displacement: 1.3cu in (20.5cc)
- Bore: 36mm
- Stroke: 30mm
- Compression Ratio: 7.6:1
- Weight: Engine: 23.3oz. (660g)
- Exhaust: 1.8oz (51g)
- Ignition: 3.8oz (108g)
- Plug: 0.50oz (14g)
- Wires: 0.3oz (8.5g)
- Total: 29.7oz (8415g)
- Gasoline/Oil Mixture: 30:1
- Gasoline Octane Rating: 87-93
- Recommended Propellers: 16x8, 17x6, 18x6
- Ignition Battery: 4.8 - 6V
- Spark Plug: CM6
- Spark Plug Gap: 0.018 - 0.020
- Plug Installation Torque: 7 - 8ft-lbs
- 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: 1.5-2 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# Distance Between Mounting Hole Centers Same Side: 2.1 (54mm)
- Distance Between Mounting Hole Centers Opposite Side: 2.7 (70mm)
- Height from bottom/Crankcase to top of Cylinder Head: 5.4 (138mm)
- Width of Cylinder Head: 2.5 (65mm)
- Distance Between Muffler Mounting Hole Centers: 1.3 (34mm)