It is EXTREMELY balky when inverted. The oil from the crankcase drains into the pulse line. It is crazy hard to hand start. I was working on starting it. I was bringing the prop through compression trying to trying to get fuel into the engine. You know how you can hold the prop tight and turn it over until it kicks then flip it to start? Well I was doing that and my daughter came out and saying, "DADDY-DADDY". I lost my concentration, and just then it fired and the prop came around and hit the back of my hand. I thought it was broken at first. It was like that most of the day. It just did not want to run. I finally got it going and it seems OK. It does not want to start when hot. I definitely need to get another starter.