I mow 1.5 to 2 acres with a newly purchased Cub Cadet 1200, 1970's model. By design it looks like air flow to the carb comes from the underside of the tractor thru a tube and is blown into the air cleaner. Problem: after two mowings, the air filter is clogged with grass clippings. Yesterday, the starter was stuck in the "on" position and would not start. After removing the starter, it was found to be clogged with grass clippings. Am I missing a screen or filter on the bottom of teh tractor that prevents grass from flying up to these parts, or is this something I just have to live with?