Need Help

[arborlis]

I have an air cooled engine with bryce berger pumps. There's a shaft going thru the pumps that move when a knob thats on the crankcase cover is pulled up. The shaft has to be manually moved back to the left while pulling up on the knob. What is the shaft for? How do I manipulate the shaft without removing the engine cover? I'm trying to start the engine. It's been sitting for a long time. I cleaned the system and have fresh fuel at the bleeders on the injection pumps. Any ideas? How is fuel turned on and shut off? How are the injection pumps driven?

Thanks