Well,it didn't really blow up but it seized. I was using the 11 HP Giant Vac along with my back pac. I had the big blower in the street and I was about 30 feet away using the back pac to blow leaves off the lawn into the street. The GV stumbled which made me look but I knew there was plenty of gas in it so I kept blowing.Ten seconds later,it just stopped....WTF? I can pull the cord but its tight,there is oil in in so i don't know whats going on.It was the last house and i was able to finish up with the back pac but now I need a new motor. A new motor is $700.00 but I am going to get a price for a short block this week. That sucks,I don't get it,the motor ran fine ,didn't use oil,nothing.Anyone have any ideas?