Thu Jul 30, 2020 7:17 pm #1787263
andytk58 wrote:The camshaft in a 912 sits in the bottom of the engine, so unlike an O-200 where its at the top.
ie, its unlikely the camshaft will be scraped dry by hand turning the engine as its drowned in oil, no?
I don't know the internals of the engine specifically, so don't have a definitive answer. However, I think the main concern is the oil naturally running off surfaces, such as the camshaft, where the engine has not been run for some time and then the engine being turned by hand.
I changed my oil just before lockdown and with the recycling centres being closed left the old oil in the hangar. I had drained it in to an old basin which I had left tilted and draining in to an oil bottle. I was surprised at how clean the basin was when I went to sort it out. IE how much oil had drained away.
Is it not also the case Lycoming and/or Continental recommend not turning the prop during periods the engine won't be run to minimise the likelihood of internal corrosion? Or is that just an old wife's tale?