I have found Evo engines to be easy starters out of the box so there might be something obvious wrong somewhere. Suggest you double check the various connections in line with the manual, I would lose the kill switch till you get it running OK, one less thing to worry about. While trouble shooting you could also lose the switch and plug the battery in directly and check its got a good charge of course. Maybe the drill is turning at an inappropriate speed , can you borrow a regular starter? Throttle open to just above a typical idle opening should work OK. Good luck.