One other piece of advise is you get what you pay for so if you buy cheep you get cheep and not so reliable. I have had Da, Dle, First Place, Syssa, Fox, and a bunch of Junck engines like the XYZ dont waist your money and time on the junck engines if you cannot work on them. Stay with Da, DLE, Syssa, or Zenoah from Ralph Cunningham.