318 heat riser open or close in picture

I have been working on one for 3 months now. From the position your photo was taken it is in the closed position. Rotate counter clock wise to open.

Take note of how the hardware is attached
I removed all hardware and soaked in penitrating oil 2 to 3 times a week. I also tapped on the end of the shafts couple tapes left couple of taps right. Use a brass drift or you will mushroom the metal shaft. Careful twisting on the split shaft it is easily damaged.