I have a Redmax 7001 blower and a 2500 trimmer that have been causing me hell. For some reason whenever they sit for 20-30 mins between yards and then try to restart them they surge, die and barely run. Now on to the WTF part of the problem..........they both run perfect in the mornings when it is cooler, in the afternoons like right now it is in the high 80's it runs horrible. They have been down at Landscape Supply 2-3 times and run PERFECT when they are there. Yesterday they ran great for the first 5 yards until about 12-1 when they started surging. I mowed 3 yards with them running bad each with about 20-25 mins of downtime inbetween. At the last yard I hauled ass to my brothers through the blower and trimmer in the back of his truck and went to the shop. I waited exactly 25 mins and started them up and they ran excellent. Could the enclosed trailer have anything to do with this problem? My dealer and mechanic are getting a good laugh out of this I'm sure, but that is the ONLY thing I changed yesterday. All of my echo products that are sitting right there with them run perfect. BTW I start them the exact same each yard full choke 3-4 pumps on the primer. The only other varible that is changing throughout the day is the temperature.