Re: idle adjustment on 1934 1103

Posted by Owen_Dyneto On 2014/7/26 13:40:41

The proper way would be first set the idle speed to something reasonable although there is no specification that I'm aware of. If you have a 6-volt 4-cylinder dwell/tach (because it's really two 4-cylinder ignition systems) try about 375 rpm; otherwise as low an idle speed as the engine is comfortable with and resists stalling - mine idles comfortably and reliably at 350 rpm. Then install your vacuum gauge where indicated in the prior post and adjust the idle mixture to the maximum vacuum without extending the mixture screws beyond that point, or do it by-ear if you don't use a vacuum gauge (which is recommended). Then go back and reset the idle speed. Then recheck the idle mixture on more time.

But really if you haven't done it, you should first check and adjust if necessary the ignition timing on both #1 and #6 cylinders to get the best optimization. If #1 is timed properly and #6 isn't (or the reverse) you'll have to synchronize the twin points, or do it by trial and error; adjustment is made via the set of points on the moveable plate for #6 after timing #1 in the conventional manner.