At the golf course I work, we recently purchased new riding greensmowers. We had the option of 18 hp B&S Vanguards or a 16 hp Kubota diesels. The dealer mechanic actually suggested that we go with the Vanguard because the engine will wear out at about the same time the transmission and hydraulic components wear out (3000-4000 hours), and thus you just salvage the machine. So do you guys with liquid cooled gas and diesel ZTR's think that the engine will far outwear the rest of the machine, and the extra cost is not really worth it. I know that liquid cooled engines have other advantages, but I just want to speak from a wear standpoint.