i have a mower i bought new in 03-04, it has been hard to start and goes through oil like a kid goes through a shake on a hot summer day.. its been to the dealer alot!! the last time was this past month, they had it all month, called me, told me it was all set, i go to get it , and it wouldnt start! the guy tells me it was because it was left outside in the rain, he gets it going and it back fires like crazy. so they keep it for two more weeks, i get it back, use it for 6 hours and ran it out of oil, yesterday the same thing, but now it goes through it in less time!!! the weird thing is, it doesnt smoke or leak oil !! however it did smoke a little before i brought it to the dealer. what the dealer told me that they did ,was ,compresion test, (ok) leak down test(ok), cleaned the breather, rebuilt the carb, increased the rpms. now by doing this, doesnt it make the motor run lean?? would this cause it to burn oil and not smoke ?? i think it was a trick that they pulled on me.. i spoke to a guy from kohler, and he told me that there is no -way that it can go through oil without smoke/ leads, there is no smoke and no leaks at all... if anyone can help or give me some thing i should look for i would appreciate it.. thanks you!!