For safety's sake go for a 25:1 mix - although some manufacturers specify 50:1, that is fine so long as a fully synthetic 2 stroke oil is used - which it rarely is. Set plug gaps at 25 thou and you won't be far out.
John
July 2009
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix hedge trimmers.