RedMax 8000 isn't running the smoothest. I have a few questions. 1) How do you get the spark plug cover off? I once tried taking the cap off my Stihl blower and disaster! The Stihl spark plug cap has a wire that hooks around the spark plug. You have to twist the cap and carefully pull it off without breaking that little wire. Stupid! Is the RedMax like this? 2) Manual says periodically check the fuel filter as it will become clogged and decrease power. So, how do you check the fuel filter? How do you get to it to check it? 3) Spark Arrester - How do you pull it out to check the screen? I tried pulling on it, but I don't want to break anything. And have you ever cleaned the filter in the muffler housing? By the way, the air cleaner is perfectly clean! Trying to figure out why it's running rough. Thanks!