For those needing to control the pressure of fuel pumps to a low pressure carb check out the fuel pressure regulator at Auto Zone. $20 and is adjustable from 1/2 to 5 1/2 pounds approx. I have one on my KR and I believe it is the same type used by Marty Roberts. My hangar neighbor has a Zenair 601 with a balanced Harley engine and his fuel pump was causing his carb to overflow. He installed this unit and kept dialing it down in pressure until the carb quit overflowing. The setting ended up to be 1.5 pounds. The unit is adjustable in 1/2 pound settings.
Larry Flesner Carterville, Illinois
