We could write a book on our engine lubrication! Everybody having his own idea or experience!I have seen lubricators w/ more cc's than the engine itself.
I personally use the minimum of oil. Thick oil will lubricate at high temp (our +/- 100°C) and will not emulsify during the run. I agree w/ KNO, 1/2 turn is plenty enough for two runs or more depending of the valve . Too much oil will make a "mayonaise"in the drawers.
I'd rather run w/ no oil than having too much ; Oil does not vaporize and finally make a mess if too much!
I have a friend who opens his top'engine and drop a couple of drops of oil and run like this for 40 min. I never seen him having any problem.
When finished sailing, I pour some thin oil (sewing machine) in, the inlet and run the engine with air untill clean oil comes out. I, then, can store my engine for the winter.
I like Nigel's or Stuart or any lubricator which can be adjusted.
But some people will do differently!