The Ford Barn

Smooth_One · 08-26-2017, 04:58 PM

Is The butterfly supposed to close all the way on my Tillotson model X when the throttle is closed? I measured about .025 on the top and the bottom when The throttle is all the way closed.

tinkirk · 08-26-2017, 05:04 PM

Quote:

Originally Posted by Smooth_One

Is The butterfly supposed to close all the way on my Tillotson model X when the throttle is closed? I measured about .025 on the top and the bottom when The throttle is all the way closed.

How high does it idle .025 seems a little much but it needs to be open some or it would not idle

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Ed H. · 08-26-2017, 05:05 PM

Not sure the exact opening spec's, yes the throttle plate must be open enough to let fuel in to idle.

Smooth_One · 08-26-2017, 05:32 PM

Ok, I know it's supposed to have a small air gap for idle but it seems a bit much to me. I pushed on it and it literally won't close anymore so I'm sure it's fine.

Tom Wesenberg · 08-26-2017, 06:02 PM

Did you back off the idle speed screw? Do that, then see if the plate closes all the way. It should, or it may need a slight adjustment by loosening the 2 screws holding it to the shaft. Loosen those 2 screws, then wiggle the shaft and plate until it's closed all the way, then hold it closed as you tighten the 2 screws.

Smooth_One · 08-26-2017, 07:02 PM

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Thanks Tom I'll mess with again tomorrow.

08-26-2017, 04:58 PM	#1
Smooth_One Senior Member Join Date: Apr 2016 Location: St Clair, Michigan Posts: 395	Tillotson carburetor butterfly Is The butterfly supposed to close all the way on my Tillotson model X when the throttle is closed? I measured about .025 on the top and the bottom when The throttle is all the way closed. __________________ Isaiah B. 1928 all metal Tudor

08-26-2017, 05:05 PM	#3
Ed H. Senior Member Join Date: Jun 2013 Location: Milton NH Posts: 148	Re: Tillotson carburetor butterfly Not sure the exact opening spec's, yes the throttle plate must be open enough to let fuel in to idle. __________________ If you see a bomb technician running, do everything in your power to keep up with him. United States Navy

08-26-2017, 05:32 PM	#4
Smooth_One Senior Member Join Date: Apr 2016 Location: St Clair, Michigan Posts: 395	Re: Tillotson carburetor butterfly Ok, I know it's supposed to have a small air gap for idle but it seems a bit much to me. I pushed on it and it literally won't close anymore so I'm sure it's fine. __________________ Isaiah B. 1928 all metal Tudor

08-26-2017, 06:02 PM	#5
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Tillotson carburetor butterfly Did you back off the idle speed screw? Do that, then see if the plate closes all the way. It should, or it may need a slight adjustment by loosening the 2 screws holding it to the shaft. Loosen those 2 screws, then wiggle the shaft and plate until it's closed all the way, then hold it closed as you tighten the 2 screws.

08-26-2017, 07:02 PM	#6
Smooth_One Senior Member Join Date: Apr 2016 Location: St Clair, Michigan Posts: 395	Re: Tillotson carburetor butterfly Sponsored Links (Register now to hide all advertisements) Thanks Tom I'll mess with again tomorrow. __________________ Isaiah B. 1928 all metal Tudor