I was going to replace them, but the seats were screwed in really tight, and at the risk of buggering them up I just cleaned them out.
So last night turned the fuel regulator as far down as it will go, and got to 3 psi. Then I let it run for just under 15 minutes to warm up. It wasn't up to full operating temp, but it was warm to the touch, and had been plugged in for a full day. I had opened the idle screws up 1 1/2 turns to start it, and after it was warm it turned them in again, but even with them all the way in it still ran.
I'd placed some scrap metal roofing angled off the side of the rear end to try and direct some of the exhaust out of the shop, and boy it wasn't but a couple minutes and the exhaust had sooted them up.
