The Ford Barn

29oldpu · 01-19-2024, 06:16 PM

What is the adjustment for low idle after rebuild?

Herb Concord Ca · 01-19-2024, 06:40 PM

idle speed is kind of a personal preference. On my Marvel I adjust the motor idle speed when the car is fully warmed up, spark advance at about 8-9 o'clock. I then adjust the idle mixture screw. On a Marvel you are adjusting the amount of gas for smoothest idle. This is opposite of a Zenith, which adjusts the air.
Hope this answered your question.

Joe K · 01-20-2024, 07:38 AM

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Renner's Corner has a "slide show" of information related to many carburetors. At least a couple of these are probably of interest to you. The slide show can be stopped for better reading/screen shot.

I could probably spend the better part of the morning reading all that is there.

See https://www.rennerscorner.com/slide-show--info.html

Check out the rest of their site including gaskets/oversize shafts etc. VERY helpful people. They've forgotten more about 4 cylinder engines than I'll ever know.

Joe K

01-19-2024, 06:16 PM	#1
29oldpu Junior Member Join Date: Nov 2021 Posts: 2	Marvel carb What is the adjustment for low idle after rebuild?

01-19-2024, 06:40 PM	#2
Herb Concord Ca Senior Member Join Date: May 2010 Location: Concord CA Posts: 755	Re: Marvel carb idle speed is kind of a personal preference. On my Marvel I adjust the motor idle speed when the car is fully warmed up, spark advance at about 8-9 o'clock. I then adjust the idle mixture screw. On a Marvel you are adjusting the amount of gas for smoothest idle. This is opposite of a Zenith, which adjusts the air. Hope this answered your question.

01-20-2024, 07:38 AM	#3
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 4,611	Re: Marvel carb Sponsored Links (Register now to hide all advertisements) Renner's Corner has a "slide show" of information related to many carburetors. At least a couple of these are probably of interest to you. The slide show can be stopped for better reading/screen shot. I could probably spend the better part of the morning reading all that is there. See https://www.rennerscorner.com/slide-show--info.html Check out the rest of their site including gaskets/oversize shafts etc. VERY helpful people. They've forgotten more about 4 cylinder engines than I'll ever know. Joe K __________________ Shudda kept the horse.