Throttle stays wide open

TMSFREON

New User
I was able to buy back my Grandpa"s 8N at an
estate sale, and had the carburetor rebuilt
professionally, but now I can only get it to go to
low idle by pulling out the choke. An example
would be if I am driving it with the throttle wide
open and move the throttle to what should be low
speed/idle it stays like if I have the throttle
wide open and I need to pull out the choke to get
it to low idle. I was shown a small plate that is
held onto the engine block by a single bolt with a
hole in it an I was told that there was suppose to
be a spring from there to the carburetor that
would lower the rpm"s with spring action when I
moved the throttle to the slow idle position. Does
this sound correct or any ideas?

Thanks
 
Move the throttle while watching all the linkage that the throttle lever controls and see where it is getting hung up. Squirt a light penetrating type oil (NOT WD because it turns gummy over time) on every moving part of your linkages.

You don't want to be swamping your cylinders with super rich gas just for the sake of a low idle and that's what choking will do.
You'll be washing oil off your upper cylinder walls to beat the band and carboning up your pistons, valves and plugs from crappy combustion.
 
The spring you described does not belong.
Make sure your throttle and governor rods are free and not binding.
Can you run the carb linkage by hand and make it act right?
Does the governor fight you when you try?
 

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