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Author Topic: Carb fuel air mix  (Read 6183 times)

R.E.Co.

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Carb fuel air mix
« on: April 01, 2020, 09:30:49 AM »
Does anyone know the adjustment for the two smaller screws that adjust the air fuel mix on the carb? Thanks

Jon
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1941 White M2
1941 Chevrolet G506 Civilian Dash
1941 Federal 94-43 4-5 Ton COE
1918 3 Ton Field Gun Trailer

spillmk1

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Re: Carb fuel air mix
« Reply #1 on: April 01, 2020, 12:41:19 PM »
After a carb rebuild probably 1 1/2 turns out will get you going.
Then adjust each screw when engine warm for best idle.

Keith
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1955 M38A1 Jeep
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coreyelliott

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Re: Carb fuel air mix
« Reply #2 on: April 01, 2020, 04:23:13 PM »
What Keith said is correct, and will probably get you close enough; however, I've always had the best luck using a vacuum gauge to adjust idle mixtures.  The motor has to be up to operating temp, then adjust the mixture screws for best possible vacuum.

Corey
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1941 Autocar M2A1 (M2-13)

yd328

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Re: Carb fuel air mix
« Reply #3 on: April 01, 2020, 07:14:47 PM »
I just looked at a carb TM and it suggested 1 turn out on each to start after rebuild. Pretty much what these guys said. The vacuum gauge is nice to use.

Gary
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