* Update - put a new glow plug in and she fired right up and is running fine. Thanks for all your help.

I've got an engine that has been sitting for years that I can't get started. It's an os .46, hardly broke in. Should I get a new glow plug? I built the plane years ago and gave it to my younger step brother because I was starting a family and had to prioritize my time. Well, now I have time but I can't get the thing to start. I'm a beginner in the hobby and need some help. - Chas