Similar thread on MLS.
At the end of a run, when the engine is cooling down, I open the drain on the bottom of the lubricator, sometimes water comes out, sometimes a water/oil mix. Am I supposed to completely drain the lubricator after every run, or only if I’m putting it away for the evening?
I also noticed if I drain it while cooling, it’s usually an oil/water mix, and the next time I run it, before I add steam oil, I’ll open it again and water comes out first, then the oil, (water heavier than oil). I have just been letting out the water, not the oil.