I just purchased an old McCulloch 10-10A off of craigslist.org. I put a 20" Windsor roller tip bar on it with a 72/72 chain and it seems to cut great. It runs great and screams pretty nice as well. I have sawed up about a 1/4 of a cord today from a fallen tree and it runs great. I was wondering if anyone has a McCulloch 10-10A Service Manual in .PDF format. Which spark plug does this saw use? Fuel/Oil Mixture? 40:1? Also, does anyone know which screw adjusts the idle? If anyone has answers to these questions, please write back. Thanks.