This picture show a very nice installation of the main Viking to RV-12 lower engine support structure.
Looking at the background fuel system parts, some comments are needed.
Slightly right of bottom center, there is an Andair gascolator mounted to the firewall. The Viking engine is fuel injected and hence have a full return fuel system. As soon as a fuel pump is activated, prior to engine start, fuel is circulating and any benefit of the gascolator to trap water is lost. Fuel sampling should be at the fuel tank instead.
This gascolator is just a heat sink, absorbing heat from the engine exhaust and radiator / oil cooler air, due to its location. This is likely to boil the fuel, creating a vapour blockage to the fuel pump inlets. Recovery would only happen after the engine shuts down from lack of fuel, the airplane descends for a while without engine power to cool the gascolator and fuel pressure is regained.
Ideally, there should be no low pressure fuel in front of the firewall and the fuel pump inlets should be below the fuel tank bottom.