Cylinder #7 down on compression

Inertia said

Thnx for the pix, - I woulda guessed #5 was the issue, maybe the head gasket between the 2.
Good luck .

Click to expand...

what o you see in #5 plug? What causes the electrode post to get discolored? I'm off today and I'm going to give a leak down test a try. Will post what I find later.