Well, I don't mind the heat as much as my mowers, and blower does... If it's above 85 of 90 degrees things are getting hard to start all the time. My 23 hp Kohler will stall and die if I have had it running and shut it off for a few minutes and then re-start it. I'm pretty sure that the heat off the muffler combined with the air temp is just boiling the gas out of the carb. My sthil handheald blower drives me nuts though. If it's over about 80 degrees you have to hold the choke lever and move it back and forth from choke to run for about a minute or better to keep it running. If not it just leans out and dies. Again, I think the fuel is evaporating out of the lines or the carb as it sits. Today my 9 hp B&S on my troybilt that I had ran 30 minutes earlier would not start for the world, well after about 30 pulls and playing with choke on and off it finally fired. Again, I assume it's the same problem as the others. Is there anything to solve this? I use regular unleaded fuel 87 octane. Would a higher grade vaporize as easily as the lower grade? I was under the assumption that the higher grades actually evaporate faster. We all are working in the heat, but for some reason I notice it's worse this season already with these problems. Obviously the equipment does eventually run but it's still a little irritating... Any obvious fixes out there?