Completed the fuel tank, air tank and engine installation. Always fun pluming the fuel system for the OS 61SF ABC-P.

The fuel tank has the normal clunk pickup for the fuel supply line that comes out behind the engine to a removal U shaped brass fitting and then to an inline filter and then connects to the pump inlet. One vent line that goes to the top of the tank is used for the fuel return that is connected to the pump fuel return output, the other vent that goes to the top of the tank is used a tank vent. The OS P engine returns unused fuel that the carburetor (more like fuel injection) does not use back to the tank. The vent line comes out behind the engine and has a one-way check valve on its end so the tank can draw air as the fuel is used. The check valve keeps fuel from sloshing out the vent. To fuel the system, the check valve is removed and the pickup line is removed from the U and fueling is done through the pickup line.

To be continued…