This thread will discuss and share information about the "big" inline gas engines used by IH from the early 1930s through the mid-1940s. I had originally started a thread asking questions about the FEB-648 engine back in 2004, and a little information was gleaned. Then I forgot about for 15 years. In light of recent inquiry from another Binder Planet member, I dug back into this subject. This time I found more information, and other sources. I will be sharing what I find here as I dig up more data.