1949 8N ford tractor

Beard · Nov 10, 2018

Can you tell me how to adjust a new carburetor? Thank you

old · Nov 10, 2018

What carb?? M/S clone or a Zenith?? If a M/S clone upper screw at 1 or so turn out and bottom 2 or so turns out to start with then fine tune for where you live

Beard · Nov 10, 2018

I don't understand is it the main adjustment or idle adjustment? I don't know what 1 and 2 mean.

Dean · Nov 10, 2018

Carburetor adjustment depends upon engine condition. There is no preset "right" adjustment.

A new carburetor should be adjusted such that the engine will start, all else being OK.

Once started, set the idle speed to correct RPM.

Then set the idle mixture for max idle speed. Readjust idle speed if desired.

Finally, set the mixture screw such that the engine will accelerate from low RPM upon a quick opening of the throttle without stumbling or producing excessive black smoke from the exhaust.

All adjustments should be made with the engine at full operating temperature.

Of course, one should never look to carburetion unless/until ignition is spot on.

Dean

Adirondack case guy · Nov 10, 2018

The 1 and 2 that Rich refers to are the number of turns out once you have bottomed out the needle jets.
Loren

Ozlander · Nov 10, 2018

Bottomed out gently by hand, not a pair of pliers.

Bottomed out means turned all the way in.

1949 8N ford tractor

Beard

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old

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Beard

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Dean

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Adirondack case guy

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Ozlander

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