I had a ~2003 model year MTD Yard Machines rider. A 600 series MTD riding mower. 17hp Briggs "AVS" single cyl, 42" deck. The mower itself was OK. It was LOUD and harsh, but OK to operate. The Briggs engine performed fine. The gauge wheel-less deck would scalp on very uneven areas- which is expected. The bad part was the belt & variator pulley drive system (MTD Transmatic drive). I could never keep it working as designed and lived with a single speed most of the time. Thankfully I bought it used and sold it about a season and a half later. I didn't know what a Transmatic was at the time. I sure do now.