Packard Forum Index » Pre-War (1899-1942)

I have opened the spark plug gap to 30. That eliminated much of the black exhaust smoke. At the lowest idle, engine is smooth. At high idle or revved up the engine is definitely missing consistently intermittent. Black smoke is then at a minimum, but still present.
Note: My carburetor is NOT the same as the carburetor on page 212 of the 1922-28 Service Manual.
1. Observe the Allen screw adjustment at the bottom in the center. Which way should I turn to adjust for leaner mixture, in or out?
The ONLY other adjustment to this carburetor is the fuel float. Which way to adjust the float for a leaner mixture?
Note that there are no other adjustments to this carburetor except to remove the air valve cover or remove the float chamber top.
Steve the exasperated

Does it look old & decrepit? It should, it turns 98 in January
[PROCESSING IMAGE.... PLEASE WAIT]