I have been tinkering with this motor for sometime and now only one thing seems to be causing me difficulties. There is a yellow plastic peice that sits above the carburator and appears to be some sort of timing mechanism. It looks a little like a paddle. It is between the alternator and th starter. My problem is that I cannot tell how to make tihs peice work or what it is supposed to be hitting. I know my ddescription is lacking, but I am hoping someone can give me a few ideas. The engine runs well, except it seems to "miss" everyonce and awhile. I will be cruising along and then it will struggle for a few seconds and them go again. Thanks for any input.