Ok, Sorry that I haven't replied in weeks...But. I found out why this engine wouldn't start after it was warmed up. the linkage from the muffler spring that opens up the choke when it gets hot, was NOT long enough.....what I did was wrap copper ground wire around the post that this linkage goes up against when it's hot, by doing this the choke doesn't open as wide as it could, only maybe 3/32nd of a inch....but it solved my problem. Engine now restarts after only being shut down for seconds to move a flower pot of whatever.