I have a 6 year old Toro 20032 Personal Pace mower, with a B&S 6.75 HP engine that I use to mow the smaller areas, and around the trees, before I get on the Husqvarna riding mower to do the rest of the yard. The Toro has been great, and usually starts on the 2nd or 3rd pull. but this year, I notice that if I mow for a few minutes, then stop the mower for more than a minute or two, it is very hard to restart...have to pull the rope a dozen times, or more. I've replaced the plug, but I think the engine is trying to flood when it gets hot, and shuts down. If I let it set for 30 minutes or more, it starts back up easily. I suspected a carburetor problem, so I bought a new carb, and put it on a couple of weeks ago, but I am still having the problem. Any ideas of what I might try next??