Engine: water cooling, 49cc 2stroke. Power:3.5HP/2.5HP/2HP Ignition System: CDI Start: pull start Speed:20km/h (200kgs loading) Running Speed:4000-5000R/Min Propreller:7-1/4*5-A (inch) Mixing Ratio (fuel to engine oil): 25:1 G.W./N.W.: 10.5/9.7KG Packing:92*35*40CM Tool kit and manual book are included in every package.