i bought a 225 grasshopper 60" ztr last week and i have been trying to get used to one . but i have a question for z owners ; when i get into high grass/weeds . like the ones that havent been mowed all winter .any way when i get into this stuff my blades seem as though they are slipping and just stop spinning until i either back up or get into smaller growth .is that normal ? is something bad or loose ? i have a scag and it would choke down in tall grass before the blades would slip . i am a little puzzled .