Hydro-Gear EZT integrated hydrostatics <---that is. I'm torn between a New Sport 48,,, or getting a used unit with under 500 hr's with the 2800 or 3100 big boy Hydro's. If I get the sport 48 Honda new,, I'll be doing all the work and maintenance on it myself. Including going to synthetic oils, after the break in period. So how many hours should I expect out of these hydro's?? I've even thought of adding a trans cooler to the hydro circuit to cool the fluid. would this help in the longevity of the unit. I'm looking at mowing 120 hrs a year. and would like to have it for a LONG time!!!!