I have a Toro Recycler...22 inch with a B&S Intek 6.75 HP engine. It has always started on the 2nd or 3rd pull...hot or cold....until this Summer. It always starts when cold, but now, after running for 20 or 30 minutes, it is a real bear to restart...takes a dozen or more pulls. If I leave it sit for an hour, it starts right up. I have pulled the plug, and it appears to be flooding. I replaced the carburetor...I found a new one online for not much more than a rebuild kit...and it acts the same. I took the engine covers off and cleaned out all the dirt and debris, in case it was overheating. I just use this mower to trim around the trees, etc., before I get the riding mower out. Does anyone have any tips on what else I might check. I installed an in-line fuel filter, and a new air filter. The mower is about 10 years old, and has been great until this began. I also checked the coil for gap, etc., and the plug wire...my spark checker indicated that I am getting good spark. I've seen some tips about valve seating, when hot...but I don't notice any real difference in the compression (how hard it is to pull the rope), hot or cold. Mowing season is about to end, so I will have plenty of time in coming months to work on this.