We have a 1672 Land Pride RFM at work. I'm having alot of trouble with it plugging. It's especially bad in the smooth brome grass but also plugs in the lawn. Dealer gave me some graphite (sp?) paint to try. before I try that is there a better solution? Smooth brome is mowed as high as the mower goes 6"? and lawn is mowed 3-4". I can under stand plugging when it's wet but not when the grass is dry. Running 540 rpm pto speed. Any suggestions or advice appreciated.