[6pack] Mixture Adjustment

[John Cohen]

Hi Guys,

I had my ZS carbs rebuilt from Paltech, put everything back together and
find the front 3 cylinders way too rich and the rear slightly lean.  This is
for a 1976 TR6 with stock everything and all emissions items still present,
Pertronix, Lucas Sport coil and Champion  N12YC's gapped to .035. .  The car
starts immediately with little or no choke and seems to idle great at about
900 PM, as it should.  When I lift the air valves on both carbs, the engine
stumbles and nearly stalls.  That should indicate a lean condition on both
carbs but I just do not see this on the front carb which appears to be too
rich by the look of the plugs.  The mixture came back from Paltech  adjusted
to 1.5 turns CCW (down) from full rich position (fully up).  This is 1/2 of
the adjustment range.  My question is: To lean out the front carb, do I use
the adjustment tool clockwise or counterclockwise? My intuition is to screw
clockwise down to lean but from what limited info I can find on the net, it
would appear the opposite is true.  Am I on the correct trail here or should
I be looking for something else going on?

 

John Cohen

Rutland, VT 

1976 TR6