[Dick Boneske]

I suggest temporarily installing a gage in whichever line that is easiest to access. It doesn’t matter in which line the gage is installed, since they’re all connected together. Since the pressure is in the range of 5-7 psi, rubber fuel hose & hose clamps will suffice to connect a gage.

If you have a section of 5/16” flared tubing, cut it to a length that will allow you to connect it to one of the carb fuel inlets with hoses.

I don’t know of an ideal permanent location for a fuel pressure regulator. Unless you add a return line to the tank, I’m not sure a fuel pressure regulator will solve the problem.

[Tucker in KFalls]

Thanks Dick, and thank you for the suggestion about the larger float in the center carb. It is interesting that my front and rear carb doesn't have the same issue (that I've noticed) as my center carb with the smaller float.

[Kenth]

Center carb has a larger .101" inlet seat, smaller float and higher float setting than the end carbs .086" inlet seats, larger floats and lower float settings, thus the center carb is more sensitive for higher fuel pressure.
Center carb is the weak link in the chain so to speak.

[carbking]

Originally Posted by Kenth

Center carb has a larger .101" inlet seat, smaller float and higher float setting than the end carbs .086" inlet seats, larger floats and lower float settings, thus the center carb is more sensitive for higher fuel pressure.
Center carb is the weak link in the chain so to speak.

If the center carb was rebuilt with a FLAPS kit, that orifice could be 0.118.

Jon