</font><font color="blue" class="small">( Twelve THOUSAND hours isn't even a whole lot....there are airplanes with 100,000 hours on them and I would consider a tractor to be more solidly built than an airplane. )</font>
Well, if there were a federal agency that mandated the maintenance, and performed inspections on tractors like they do airplanes, they would probably get more hours too. /forums/images/graemlins/grin.gif
MF has a 1500 hour warranty on their sub-compact engines and a 3000 hour warranty on the larger tractor engines, so I guess they at least expect them to last that long.
However, the least expensive and most important maintenance we can do on any engine is to change the fluids and filters on a regular basis or sooner if needed.