A reader has two questions for Paul McBride, the General Aviation News engines expert, about the Lycoming O-235-C1B engine in an amateur-built Wag-Areo Cub.
The new engine is a fixed pitch version of the larger displacement 186-hp fuel injected constant speed prop CC340 engine first introduced by CubCrafters in 2017.
The five-day school is offered 12 times in 2022.
If an engine conversion to 8.5:1 compression ratio pistons was not approved by Lycoming, the conversion to 9.5:1 in your engine is adding insult to injury.
A reader’s solution for his engine troubles highlighted in a recent “Tips & tricks from our readers” post may hold the answer for this aviation maintenance pro and the engine problem that’s frustrating him.
My new engine is burning a quart of oil every four to five hours. Some “experts” are telling me I probably have glazed cylinders and others say just keep on flying it hard and the consumption will drop. Should I be concerned?
What could cause such high levels of aluminum in the oil? Inactivity plays a big role, according to our engines expert Paul McBride.
Through normal operation your engines blow the first quart overboard ending up on the wing and the flaps. I could tell you that this was a design by Lycoming in an effort to prevent corrosion in those areas, but that wouldn’t play very well, so we won’t even go there! Seriously, it’s nothing to worry about, as long as your engine does not have a history of excessive oil consumption.
There is no problem removing the vacuum pump drive from the engine — and there are actually two options for you.