bobcat 863 new owner, I need some help?

Hello guys, my name is Josh. I am in the Navy and opened an electrical business in South Carolina. I've also always done a ton of side jobs like re-building anything I can possibly find on craigslist and turn a profit. This weekend I rented a mini-excavator and cleared a little bit of land for a customer, it was a lot of fun. I've ran a lot of equipment before but this really sparked my interest in doing this more for some side money. I found a bobcat 863 high-flow skid steer on craigslist for $4000 tonight. Has about 4000 hours on a leutz diesel. He said he things an 83 HP but I've read most are 73? Has a new bucket and tires. Only problem is he said that it has been overflowing with diesel. Runs and usable, but he thinks an injector or two is going out. I'm a pretty decent mechanic, work on all my own stuff, welding, whatever it is, but I know nothing about these machines. Quick thought, machine burns fuel, no smoking, not burning oil, says "overloading with fuel." Any quick thoughts? Also, is this a pretty decent deal? Can I add attachments onto this machine? I'm not sure what the high-flow means? Thanks a lot guys. normally I know a little bit about stuff when I walk into these forums, but this time I'm a complete newby to owning equipment. Any help would be appreciated. If it is injectors, what kinda cost am I looking at for all 4? I'll do the work myself. Thanks a lot guys.