The pressurized 'out' line from the pump is 4mm, which goes into a 'Y' and then to the two fuel solenoids. The 'fuel' solenoid continues the 4mm to provide fuel to the turbine; downstream from the start solenoid there is a 4mm to 3mm connector and the 3mm fuel line goes to the start connector in the turbine. I have tried to attach a plumbing diagram, but not sure that it worked..
Regards,
Gus