Has anyone ever had an air filter clog up and cause the engine to start smoking, fairly bad? Mine started smoking a little at the beginning of the yard and was smoking bad at the end. I talked to a man about rebuilding the engine and he told me first to change out the air filter. I took it completely off and it did seem to help. I mowed about 45 minutes without any filter. I bought a new filter today and I am hoping that this will work. I also have a mower that will just click click when you try to start it??? I changed out the relay with the two bolts on top and still the same thing any ideas?