Guys,
I'm sorry you're all having trouble with your LM engines. Once broken in, I have found them to be outstanding. Easy to start, excellent top end, excellent and reliable idle and excellent transition.
Have a look here.
http://www.youtube.com/profile_videos?user=hopeso
The engine was converted to rear exhaust and a special muffler/throttle was built. Notice that it idles solid and reliable and the pickup is almost instant,,,, if you can ignore the audio lag,,, not my fault, it's YouTube's fault. This modified engine is going into an ARK400 that is being converted
from electric,
to glow.
So if any of your engines need a home, maybe I can help.