A am near applying for an airworthiness on my project and
need to specify engine model. For many registered experimentals
I see AMA/EXPR as engine manufacturer and UNKNOWN ENG for model
even though the engine is standard aircraft engine.

Is it advisable to use that declaration? I use an electronic
ignition and non factory fuel system. So it is not a certified
engine.

------------------------------------------
SQ2000 canard project: www.abri.com/sq2000