My 2001 Walker GHS with a 26 Kohler has just over 1000hrs. Early last week after a an hour or so of mowing it began to sputter like it was starving for gas. I shut it off, checked everything, let it sit for a while and 15minutes later it cranked right up; long enough for me to get it to the trailer. I took it home and did a thorough check including cleaning the air filter. The next day it did the same thing, ran for and hour and quit. I took it to the shop told them the symptoms and they replaced the air filter and sparkplugs. Got it back late yesterday afternoon ran it this morning and same thing again. From the beginning I thought it was the fuel filter but they did not think so. Has anyone been through this? I bought a filter but after reading my manual it says that a walker dealer or kohler mechanic needs to replace it due to the pressure on the system. I need it fixed yesterday, help!!!