gas fumes, when running

[scoutpilot]

Once you have reached the highest vacuum reading with the vacuum gauge you need to turn it back so the motor drops one hundred RPM. Lock the distributor down. Watch the vacuum gauge as you adjust the steel idle stop screw in the throttle lever to again reach the highest vacuum reading. Then adjust the mixture screw for 650-700 idle RPM.

[SteveKfl]

Are these in the correct sequence?  Idle screw for vacuum changes?  Maybe that's what "I" do wrong. 
Watch the vacuum gauge as you adjust the steel idle stop screw in the throttle lever to again reach the highest vacuum reading. Then adjust the mixture screw for 650-700 idle RPM.

[scoutpilot]

That is correct.

[SteveKfl]

Well, thanks for setting me straight.  I'm going to copy the directions and add them to my workbook for references.  I have always set the idle speed first and then the mixture screws for max vacuum.  I hope to never be too old to learn from "experienced masters".  Thanks!

[scoutpilot]

The idle stop screw controls the airflow through the carb. The mixture screw controls the fuel flow. Yes, the idle stop screw does affect rpm but only by controlling that airflow at the vacuum port in the throttle body. Adjust the idle stop screw, usually steel, with a slotted hexagonal head first to get your best vacuum reading. Then adjust the mixture screw for your idle rpm. Did you watch the video?

[SteveKfl]

Thank you for the detailed description.  I watched it, but I don't have a dwell meter nor the same carburetor or even the same carb position (DJ3A) so I didn't absorb it.  I have now watched it "better educated" and can better understand your video (but still don't have a dwell meter tho).  Question, how did you determine that 700RPM over 650RPM was best for your carb model?  Was it in some "carb specs", or from "field tests responsiveness"?  Also, could you please "educate me" on what "dwell" is and what it measures"?  Thank you so much for your patience and "knowledge and experience" shared to Willys owners.

[scoutpilot]

Generators don't excite until 700 RPM.
This link will take you to a detailed explanation - https://www.howacarworks.com/ignition-system/checking-the-dwell-angle

[SteveKfl]

Good to know about the 700 RPM trigger.  Thanks for the link, it was one of several I visited to try to "catch up".  I found it interesting that all had different dwell degrees indicated, from like this one of 52 degrees, to also, "45 degrees for four cylinders", and more like your suggested 42degrees, also found indicated on Willys specs at 42 degrees.  I also found various and some very cumbersome methods suggested for "timing".  I like your method best.  Thanks for your time and patience.

[scoutpilot]

While 42º is the optimum, Dwell can be 42º, +/- 1º. So, 41º-43º is good. With the carburetor mixture, 1 1/2 to 2 full turns out from a light bottom is a basic starting point for adjustment of fuel flow at idle.

[tow hook]

Once you have reached the highest vacuum reading with the vacuum gauge you need to turn it back so the motor drops one hundred RPM. Lock the distributor down. Watch the vacuum gauge as you adjust the steel idle stop screw in the throttle lever to again reach the highest vacuum reading. Then adjust the mixture screw for 650-700 idle RPM.

 i opened my service manual to educate my self a bit more, glad i did. when i first had it running, i was told i had a low idle. ( that was last year ) here i turned up the idle mixture screw, not the idle set screw ! i'm getting a timing light tonight to set the rpm. then redo what your video has in it, and hoping for better vacuum

[scoutpilot]

You don't need a timing light to set idle rpm. You need an analog Dwell/Tachometer.

[tow hook]

You don't need a timing light to set idle rpm. You need an analog Dwell/Tachometer.

 i got one, seems to be some confusion as to were the wires go? to use the tach.    the red wire goes to the neg side of the coil. black to a ground or battery. the 3rd wire looks like it was green goes ?

 thanks

[scoutpilot]

Normal analog Dwell/Tachs have only two wires. Red and Black. No green. I can't see it from here. Photo?

[SteveKfl]

Does your tach/dwell meter have a switch to go to either tach or dwell readings?  WHAT make and model is it?

[tow hook]

i have a dixco pro tester 5. i have it set on dwell. as per the worn directions on the back.... i have the green clamp to the neg side of the coil. red clamp to the poss of the battery, the black wire to ground.  it doesn't have a 4 cylinder line on the meter ..... it says for 4 cylinder rpm/ dwell double 8 cylinder readings. it didn't work in any other combo of wire  hook ups

it's showing me 400 rpm x 2 that's 800 rpm . the idle set screw slot is rounded out ( i assume it's because the faces the valve cover ) even using a wrench , i saw that some one used vice grips before, and rounded it as well.  i'm going to try and lower the rpm today.

the brass port  ( in the intake was loose ) were i hook up the vacuum gauge. that's now taped and tight.