Hi@zkeng,
Unfortunately, writing to IFC is not that straightforward.IFC has a semantic data model: it's not just a bunch of shapes, but everything is related to each other.This makes it one of the most complex formats to write, as you need to tell FME how these relationships should be established.Have a look at thistutorial.Scroll to the bottom for an example of a CAD->IFC conversion.
Edit: Attached is the simple dwg file I tried to convert.