I also have several LA's and one thing I found is that they run REALLY rough for the first couple of tanks. I couldn't get anything close to an idle out of them until about the third tank, and when they are new, they shake like crazy. After a few tanks, they settle down, and they are great running engines that require almost no adjustment.

I also found that they are typically rich at the recommended setting of 2 1/2 turns out. Some of mine run at 2 turns or less, but be very careful about leaning it out too much. They are pretty forgiving, and will tolerate a rich setting for initial break in. Just run it wide open for a couple of tanks before you try to get it to idle.

Good luck