I learned that you have to burn off all that assembly lube before she will run right. Otherwise she is "technically" running rich. I tend to pull back the L so she will idle long enough to warm up and make sure the H is set to spec 1.25 or so turns out then bury her in some wood (Thanks CLiff R) and let her get hot and burn off that lube. I might lean her up just a little (Maybe a 1/4 turn) to make sure she doesn't flood out. Listen to her. Make sure she is 4 cycling or right on the edge. Get a few cuts done and run her a touch rich. She should be ok. Took me 4 nice cuts through some 16" Pine with my 51 then I richened her up that 1/4 turn and she is fine.
Just gotta burn off that lube. Else she will flood out quickly.
Also, have a few plugs handy. so when they soak you can swap and keep burning that lube up.