6-71 Detroit stuck at full throttle

Started our old Wabco 777 after sitting for 6 years or more. I thought it would take some doing but it fired right up and went to warp speed. The throttle did nothing and neither did the shutoff. So I cut the fuel line. I don't know Detroits but my guess is there's something stuck in the fuel control in the picture below. Any help is greatly appreciated. Sorry for the underlined words I don't know what I did. View attachment 224544 ...​

6-71 Detroit stuck at full throttle