Originally Posted by Derek's Lawn Care
Ive used sthil, echo, red max, honda, and maruyama and I by far like stihl the best, easiest to use, most comfortable, and most powerful, only drawback is i dont like the cap system. jmo
Hey DLC. Not sure what model/year your Stihl trimmers are, however their latest trimmers from 2011 and onward have redesigned caps that fix the pesky locking mechanism that were problematic with their legacy units (assuming that's the cap issue you speak of). Stihl also had a recall of all Stihl models that used that toolless cap design (trimmers, chainsaws, hedge trimmers, etc) and the newly redesigned cap seems to have resolved this problem.
Here's the link to Stihl's recall notice for their fuel cap design problems. http://www.stihlusa.com/recalls/recall_toolless_cap/