thanks carscw, it wasn't that serious a couple have just wondered why we started using a different brand. we are still doing the same quality work just a different color mower.
I'm guessing the were older clients? I had the same thing happen to when when I started using ZTR's instead of my walk behind mowers with a sulky. If it wasn't for taking a little longer and being more fatigued, I would only use walk behind mowers.