Carburetor Idle Mixture setting (practically)

[brndiar]

 

Please,

could anyone explain to me, how do I do the step 3. to 6. in practise?

Is a rotation at my second picture correct (toward RICH, step 3)?

Apologise for my 1  picture, after uploading unable to rotate.

 

Thanks you in advance,

m

 

 

[Guest]

With the engine warmed properly, set the throttle to idle around 650-700 RPM, smoothly pull the mixture to ICO.  If the mixture is properly adjusted you will see a small momentary rise of 30+/- rpm.  A greater rise indicates an overly rich mixture, less or no rise indicates a lean mixture.

The idle mixture screw is a fine threaded needle valve, turning clockwise leans the mixture, counter clockwise riches the mixture.

Clarence

[carusoam]

Better late than never..?

Not sure what they mean by engine rolls or lags...

Best regards,

-a-

[PT20J]

If the mixture is off very far, you may find setting it changes the idle speed and then you have to reset the idle speed and then adjust the mixture again.

[0TreeLemur]

I love this simple, short thread.  If MS had a FAQ, this would be a great entry under "Carburetor Adjustment"  Thanks @Clarence and @PT20J for sharing your experience.  I've got an appointment with an A&P to install an O/H carb on our C.  This info will help me help him.

[Rjfanjet]

Sorry, another question. Being in SLC and summer, should the idle be adjusted any differently? 

Just replaced the old carb with a rebuilt unit and trying to get dialed in. Right now I'm at 650 RPM and a rise of 30 with the mixture cut off.

Thanks.