The Ilo engine was built in Germany in 1924. Little is known of it, but its size indicates it was for powered gliders.
O-20 -- {2.205 / 2.598 / 19.8} / {56 / 66 / 325}
2cyl; Ilo; 5hp@3000rpm; 1924; Wt = 33#. Ae39. Applications: None found.