Rich running Weber K551 (K5534) carburetor. How do I lean the fuel mixture to remedy this problem?
The manufacture states, in the installation instructions, that the fuel pressure at the carburetor inlet cannot exceed (3.5 pounds). It is recommended that if youre fuel delivery system is producing pressures above this amount a fuel regulator should be installed before the inlet. Pressure should be set at or around (3 pounds). It is also possible to swap out the main jet (size 65) with the secondary jet (size 47.5) to reduce the amount of fuel being delivered without affecting the overall performance of the carburetor. The carburetors are delivered from the manufacture preset to run rich. This is to reduce the likely hood of burning a piston due to a lean fuel mixture.
