N941WR Legacy Member Sep 9, 2009 #2 Based on the age, I'm guessing here... Lycoming O-145 of 65 hp? Scratch that, the O-145 had the lifter tubes on the bottom of the cylinders. I could be an O-235 or O-290. The O-235 was first introduced in 1940 and the O-290 around 1942. Last edited: Sep 9, 2009
Based on the age, I'm guessing here... Lycoming O-145 of 65 hp? Scratch that, the O-145 had the lifter tubes on the bottom of the cylinders. I could be an O-235 or O-290. The O-235 was first introduced in 1940 and the O-290 around 1942.
