I have a 2007 Walker with Kohler Command 20. I started it up to warm it up for an oil change, it ran for about 5 minutes then died. It cranks over fine, but does not make any attempt to start. I have new plugs, fuel filter, checked that the fuel pump is working, and I have spark at both plugs. Now the next morning, I had to crank it a little but i started and ran again for about five minutes, died and wont start again. After cranking it a few more times, I pulled the plugs and both are wet so fuel appears to be getting to the cylinder, both plugs also still have spark. I didn't check to see if plugs were fouled immediately after it died. I plan to do that if I get it started again. I have searched the web pretty extensively, but I can't find anything quite like I am experiencing. Any help is greatly appreciated. Mower has about 1350 hours on it. Thanks in advance!!