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Ford 9N, 2N & 8N Discussion Forum
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Carburetor-choke disassembly

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6N's Short

05-09-2005 10:59:33




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Hello guys! I have the carburetor on my 2N almost completely disassembled (heaven help me) except for the choke plate. I removed the retaining screws from the choke plate per the FO-4 but the choke plate does not volunteer to come off the way the throttle plate did. I look down in there and the choke plate is a bit more complex than the throttle so I did not want to abuse it too much. There is a spring etc on the inside of it. Do I need to do more to get this off? The manual does not elaborate.

Also, there was no "packing" on the throttle shaft when I removed it. I suspect this carb was dismantled before since most of the washers are gone from the various screws and probably the packing is lost with the washers. No problem as I can replace all that, but since my float checked out good (no sloshing inside, no bubbles when immersed in hot water) could it possibly be that the lack of packing is a source of a leak? Just a thought I wanted to bounce off y'all.

Thanks!

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Tom WY

05-09-2005 21:24:06




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 Rob: Carburetor-choke disassembly in reply to 6N's Short, 05-09-2005 10:59:33  
OK Rob, please explain the right and wrong way to re-assemble the choke to the shaft inside.
I think Im with Rummy AND Dummy on this one! hehehe I fiddled with mine (choke) for some time and still not sure if its right. Seems to disagree with the vague picture in the fo-4 manual..... .



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Dell (WA)

05-09-2005 22:54:46




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 Re: Rob: Carburetor-choke disassembly in reply to Tom WY, 05-09-2005 21:24:06  
Tom..... ...the spring loaded flapper valve in the top haff of the choke plate is designed to be sucked into the engine when the choke is fully closed thereby preventing "flooding" by the fully closed strangler. It semi-works 'cuz the updraft M/S is still very sensitive to flooding by excessive choking. You should know by now, carburator parts diagrams LIE. (grin)..... ....Dell



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souNdguy

05-09-2005 12:57:28




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 Re: Carburetor-choke disassembly in reply to 6N's Short, 05-09-2005 10:59:33  
Yes.. if you had no throttle shaft packing.. it probably leaked there.

And yes.. as rob said.. 2 screws come out, and the choke flapper comes off the shaft, and thent he shaft pulls out.

Soundguy



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Rob

05-09-2005 11:17:31




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 Re: Carburetor-choke disassembly in reply to 6N's Short, 05-09-2005 10:59:33  
Choke plate is inserted in a slot in the shaft so it pulls out. Reassemble so flapper valve opens when choke is full closed.

What leak? Your gasket mating surfaces warped? Can"t tell by looking but it would leak where the bowl mates.

Is the choke plate in backwards and a little full choke floods the carb inlet so gas leaked there? Or were you choking too much and gas run out the carb inlet?

If a rummy rebuilt that carb the choke return spring might be put on wrong and the choke plate is in wrong all because it"s easier to do wrong and kinda tricky to figure right. The tiny port in the throttle throat probably isn"t open either and the smaller one right near it too so the idle never adjusts right. Maybe not.

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6N's Short

05-09-2005 11:48:06




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 Re: Carburetor-choke disassembly in reply to Rob, 05-09-2005 11:17:31  
I should have explained that better. A rummy rebuilt it before and a dummy is rebuilding it now. I am, however, a meticulous and thorough dummy. The leak I was talking about was logically, I thought, from a bad or dirty float.
Neither appears to be a problem. So I noticed the throttle packing was absent....but I don't know if this would leak anything outward. Probably the choke packing is absent too. Just trying to figure out were the dripping gas was coming from. I was having a situation where I would leave it set and gas would drip from the bottom of the carb. Since the shutoff was broke, I could never really take the time to figure out exactly where the gas was coming from (overflow hole or elsewhere) plus the whole thing is so grungy that it was not obvious. I will sort out the leak soon enough but right now I am having a little trouble with the choke plate. It doesn't want to come loose. Does the spring need to come off first or does it come out as an assembly?

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Rob

05-09-2005 12:04:57




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 Re: Carburetor-choke disassembly in reply to 6N's Short, 05-09-2005 11:48:06  
The spring doesn"t need to come off. You remove the screws and slide the plate out of the slot.



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