I have bought a Ryobi 4 cycle powerhead for a weed wacker this is the third power head that I have bought that only lasted a year I am really really sick and tired of purchasing powerheads every year I get maybe three uses out of it and the thing doesn't want to stay running and I'm a little pissed off I would like a brand new 2-cycle powerhead sent to my home for the inconvenience of the four cycle piece of *** that you have my phone number is 860-448-**** and I'd like to speak to an associate and or supervisor thank you bye User's recommendation: Do not buy a 4-cycle Ryobi powerhead they suck.