hey all. i just got my first moped - 78 sears free spirit yesterday. ran great all day. today, i went to fire it up, but alas - no go. i replaced the spark plug, which was totally wet with gas and oil when i pulled it out, and sprayed the carb down with cleaner. it sounds like it wants to start as long as i peddle, but when i stop, it just dies. any ideas? i don't know where to start. thanks, ned.