Crankshaft Threads : M10x1.25 / Outer Diameter : 9.0" (230mm) / Total Weight : 13.4oz (380g) / Benchmark Propeller : 22x10", 23x10" / Displacement : 4.4 cu in (72.7 cc) / Oil Type & Content : 2-stroke / Product Length : 7.2" (182mm) mounting bracket to drive washer / Bore : 1.14" (29.0mm) / Power Type : Gas / Stroke : 0.87" (22.0mm) / Engine (Only) Weight : 5.732lbs (2600g) / RPM Range : 1,200 - 7,000rpm / Propeller Range : 22" x 10" - 23" x 10"