The first mowing season with my Raptor I put 96 hours on it. We broke the all time record for rainfall here that year and the grass was literally growing an inch a day.
Last spring/summer was more typical and I only put 60 hours on it.
I hit a small tree stump and stripped the pulley on a spindle,..which in turn broke the belt. That's the only problem it's given me in 170 hours and it was my fault that it happened.
It's got a 52" cut and a 23 HP Kawasaki motor.
In deference to the 2200 series transmissions, I only cut for about 1.5 hours before allowing them to cool down. (I'm ready for a break after 1.5 hours, anyway.)
I'd like to get 500 hours on it before a transmission craps out.
We'll see.