dogpilot wrote:Perhaps you are forgetting why we cycle the prop during run up in the first place. This is not a very magic system, in fact it is quite simple. The governor is just a metering valve that is controlled but some spinning weights to regulate RPM. The valve is a simple push pull affair. The prop dome is a big piston with a spring on one side. So oil pressure pushes on one side and the spring on the other. There is no regular circulation of oil going to and from the dome. At start it is full of cold oil. Cold oil makes the giant O ring in the dome less slippery, since it is a bit stiff. So almost every aircraft with a controllable pitch prop has you cycle the prop to circulate some warm oil into the dome so it responds quicker, like on takeoff.

The big O ringing the dome is one of those things that get stiff that are super nice to replace on the calendar schedule prop overhaul. It is all the rubber bits that decay at a predictable rate that have to be replaced. If your screen on the gasket has that much crud on it, you have bigger problems than just slow cycling.