I am getting symptoms of a clogged intake grate, but when I look up in there, it seems to be clean. The engine runs revs high, but I am running at about half speed. It doesn't look like the propeller is damaged, the only thing I found was piece of cloth stuck around the shaft next to the propeller, it pulled out pretty easy, could this of cause it? I haven't had a chance to ride it since then. Any info would be appreciated!