Re: [Amc-list] Choke frozen (literally)

[Frank Swygert <farna@xxxxxxx>]

On that one there is a choke pull-off piston I think. A vacuum leak or loose fitting piston could keep it from disengaging. It's not supposed to have a lot of vacuum on it, just enough to keep a little tension on the choke plate, similar to having a light spring on it. The theory is that a cold engine won't produce good vacuum.... the piston may not fit tight enough until the carb body warms up either. 

Are you positive the bi-metal spring is pulling the right direction? Check it again just to make sure! 

-------------
Date: Wed, 28 Jan 2009 00:18:25 -0800
From: Tom Jennings <tomj@xxxxxxx>

Victor the Cleaner wrote:

> > On Tue, Jan 27, 2009 at 05:30:15PM -0800, Tom Jennings wrote:
> > 
>   
>> >> Sounds like the bimetallic motor isn't engaged with the slot (or pin) on 
>> >> the lever... and is just pushing it around and getting stuck. I've seen 
>> >> three methods of bi-metal to linkage:
>>     

When it stalls on the street, pop off the choke housing w/o turning. Is 
the lever stuck? Did you separately test the bi-metal? Bic lighter works.

Carbs are subtle; loose fits, gravity weights, sometimes parts get too 
worn to work right. Sometimes you gotta pull shafts to clean w/gun 
brushes, and if they're badly scored, can't really be repaired.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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