The other day, my fuel line had a leak. It wasn't in the easiest spot that I could change it so i took it to my dealer to let them take care of it. They did but when i started using it again, the mower started to surge up and down really bad. I took it back into the dealer and asked why it was doing this and told them to fix it. They fixed it they said, but the next time i go to use it, it is doing the same damn thing. Surging up and down really really bad. It got to the point where i couldnt even mow any yards, so i took it back in and they said they would look at it again. They had the mower for 8 hours and when i finally get it back, it was worse than it was before. The mower surges still and when i turn on the blade, i have little to no power and cant mow with the mower. I was wondering if this has happened to any of you and if it has, how do i fix the problem. I need some input because the professionals that are supposed to fix it cant even fix the problem and im starting to get pissed off. Please let me know if you know how to fix this problem.