Willoughby
Well-Known OPE Member
I bought a McCulloch 10 10 , seller said it runs good but after draining fuel and oil to ship it ,when I get it, I filled it with fuel and oil and pull on it for a while and it wont start , it has spark and the choke works , tried a new plug , checked compression it has 90 psi compression , Im a retired auto tech and I know 4 stroke engines will start and run on as little as 80 psi , they wont run good but they will start , and they also have multiple cylinders, I do have a basic understanding of 2 stroke single cylinder engine operation but I'm still pretty green yet, how much compression is needed for a saw to start and run ? thanks in advance for any responses