Petter AVA1

Hi all, anyone got loads of pictures of a working example? Just to reference mines OK there's a small brass pipe below the, I'm assuming, fuel pump where the fuel tank pipe goes into, that seems to have been cut off, would this have any kind of fuel return?

Also, my flywheel will rotate a full 1 1/2 turns each way then stop dead. Looking at the valves there both closed at the time so I'm assuming it cannot be hitting the piston. I tried with the little lever at the top to open the one valve and it still does it.

Thank you