Since you asked...

My push mower is actually a new B&S engine on an older frame I had. The self-propelled frame had way too small of engine for the blade size AND the self propel. So I warranty'd the 1st engine, but when I burnt up the 2nd mower, I bought a new, bigger motor.

Our riding mower is a Kubota field mower. I added a hydraulic pump on the rear PTO so I could add a small 3ft bucket and/or a front brush deck.