used sparkplug in new(?) engine
Today I was going to begin installing the chain on my bike. The engine came with a sparkplug installed and a spare one in a plastic bag. The supplied wrench would not fit the plug or the gear so I got my own wrench and removed the sparkplug. This sparkplug was black and smelled of fuel. I received the kit in early February and have made little progress. The other plug in the bag is nice and shinny. I put my thumb over the plug hole and turned the drive gear and it has compression. The plugs are LD Z8C. I wish I had a camera to send a picture. This makes me wonder if I have a new engine. It looks new...How could I have a used spark plug in a new engine? Has anyone experienced this?