Okay, I'll 'fess up. I was sooo excited to get started on my first carb rebuild that I turned the cover head screw the wrong way. As I was thinking to myself "man, they put these on tight" it snapped! broke off half way down the hole! yikes... good beginning. LOL Yeah, I know... righty tighty lefty loosy. From there on I slowed down, thought about things, and proceeded with more caution.