You could help yourself a little bit more than you do..
You might have said it's a Ryobi Strimmer
You might have said it's a 2 stroke
You might have used the search box on the top right of this page
Had you done so you might have arrived at this place...
http://howtomendit.com/answers.php?id=81974
Where the answer can be found...
Happy strimming..., June 2015