Problem is , seems like every two years I have to have it in shop because engine will stop running while mowing. If i'm fast enough to disengage then reengage the saftey bar before engine completely stops it will rev up and continue to run. By end of mowing season the duration between ocurances gets shorter and shorter untill mower will not start at all. Can't remember what they replace at the shop. Does anybody know of this or has this problem themselves. Would like to be able to repair this myself.