Is it a horizontal cylinder?
They are pretty prone to that no matter who the manufacture is. After being run all the oil that has been splashed around on the inside will run down the walls. Some will also be on the bottom side of the piston and again it will seek low ground. It will puddle in the cylinder bore and some will work it's way around the rings. My B&S engine on my lawn tractor does this and always has. My moms 15 year old Honda mower has done it as long as I can remember.
Simple test would be to set it at an angle so the cylinder is pointed up a few degrees. That way any oil that was running down the inside tends to make it's way back into the sump. Try it again in the morning. I doubt it's anything to worry about as long as it only does it for a couple seconds and runs clean after that.
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1959 22' Caravanner
1988 R20 454 Suburban.
Atlanta, GA
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