S sven556 ArboristSite Operative Joined Apr 21, 2016 Messages 130 Reaction score 36 Location kansas Oct 18, 2016 #1 Can anyone tell me what size o rings to buy to replace the three o rings on the oil pump?
HarleyT Tree Freak AS Supporting Member. Joined Dec 6, 2014 Messages 21,165 Reaction score 25,020 Oct 18, 2016 #2 get them at the Stihl dealer #9646 945 0590 $.99 each Mediacat says that the size is 8x2