Q: I have a mid-time O-235-N2C. I recently pulled the engine from service due to low power reports from our renters. Initial troubleshooting revealed two cylinders with low compressions. One was 55 and the other was 62. Decided to do a top overhaul.
Put it all together, including an overhauled carb, and I still cannot get more than 2200 static on the ground.
All compressions are 77 or better on the overhauled cylinders.
I also performed the Lycoming valve lifter clearance procedure recommended after cylinder replacement.
The engine is installed in a 2004 AMD Alarus and the TCDS indicates 2550 min and 2750 max static. I also noticed the oil temperature was higher than usual. [Read more…]