While disasembling the saw to take care of the broken flywheel I pulled the cylinder to check condtion. Im a certified car mechanic and Im used to cylinders looking bright and shiny. This cylinder has no scoring but the cylinder looks to be silver with tiny tiny black dots. Im guessing this is a coating of some sort. If this is a coating then a cylinder that is bright and shiny would be worn more than one that is not. thanks some much for all the help. Im starting to get addicted to working on these things.