So what you are now telling us is that there are many things going on with this engone, but you’ll only give us pieces of info a little at a time. My time here is now ending as I’ve never been a fan of those who think we are here to hold their hand, but give us bad info. You started this thread saying it wouldn’t start, and to solve that problem you started throwing parts at it. When that didn’t work you figured you had a compression problem, so you figured you had to open the engine up. Before you opened it up you wanted to know how to identify a scored cylinder and bad rings. Now as I’m typing this I see that you are going to try reading the manual. From what I’m seeing you have one confirmed problem, non starting and two or three possible problems, so your novice brain says I’m going to attack this the way I want and the guys on this forum will bail me out. My last piece of advice to you is read the manual throughly and find a good troubleshooting procedure which tells you how to advance when you’ve already confused by everything you’ve done so far. Good luck in your efforts and I hope a tech more knowledgeable tech than me can guide you through you project. Bye, bye, bye.