I stay clear of echo trimmers like listed above under 25cc's . Gravely mowers over 36" , Encore mowers, lesco mowers anything john deer. Some of the smaller Kohler engines (non electric start) . Basically if you didnt pay alot for it....you aint getting alot for your money. I found that out the hard way dont get me wrong the expensive stuff has its faults to but the cheapo stuff just dosent cut it unless you do lets say under 40 yards a week.