Hey everyone. My son just bought a YT6800 to replace his YT3600 and we have started parting it out. I was the 2nd owner of this magical little machine. It's been primarily used for my home over the last 25 years and a little bit of neighborhood lawns for my son to build his lawnmowing service. I used to own a Yamaha dealership, so I had good access to parts and info. About 10 years ago I replaced the motor because a case half got warped and wouldn't seal anymore. Well, this engine just decided that it would start to make a little noise inside, so he went looking for a 6800. Just this last summer, I went thru entire machine, and the oil has been religiously changed every 25 hours over its life. I serviced the hydrostatic drive oil and of course had to improvise for a few other things over the years to keep the old girl running. Go Yamaha :))))