gardener buddy wrote:"http://www.youtube.com/watch?v=NAQaAaOIs7Q
The above link is the last posting of the testing. The ideal settings seems to be 4 feed and 6 air without wasting any coal. In this video, the stoker was shut down for 5 hours with no maintenance and restarted. The black pieces around the edge appear to be unburned coal, but are actually ash. The ash is of a powder consistency. This is the end of the testing of Wyoming coal."
What has become of the EFM Bit. coal experiment? Will a EFM 520 Highboy burn Bit. coal if it is the correct size? The Bit I get from Middlesboro, KY is really good quality and they have it in different sizes for stokers.
Buckwheat Anthracite coal is the biggest that you will want to burn in a efm 350 or 520 the auger flights are 1.5" X 1.5"
The Auger tube is 2".
The EFM 700 900 & 1300 use a bigger Auger 2" X 2" Flights with a 2.5" auger tube .