Repowering 52 bunton hydro, it currently has a 10 year old 16hp vanguard that pulled hard till year before last then started to fall off. This year reguired nearly stopping it to keep from choking it out in the wet grass, thats after i moved the fast idle up to 4000 rpms. The 16 vanguard will replace the 14 kawasaki on my backup mower. The question revolves around the fact that I can purchase a new kohler command off ebay for around $600-$650 shipped, And supposedly local dealers have to honor the 2 year warranty after that I will do all work reguired. This seems like a good deal since a new vanguard 18 hp is an easy grand. Anyone had experience with these engines "bought through ebay or the internet?" Thanks for your input.