OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Tecumseh / Kirby Engines Kirby-Lauson VK-30 4-stroke oil fill level?

The instruction manual and plaque on the crankcase are a bit vague about this. They say "Fill to the top with oil". But what do they mean? Surely they do not mean fill to the point of overflowing? Also, I notice the oil fill chamber is in two sections. I would be inclined to fill to the bottom thread on the top chamber that you can see in these photos. Bit I wonder if you would even need that much?

Can anyone who knows these engines well please provide a definite answer? This has been puzzling me ever since I took possession of this mower.