[Mgs] HS4 Carbs

[Max Heim]

Larry’s response made me go look, and yes, it’s exactly how I described it. 

The end of the choke cable is attached to a fixed object (the extension of the front carb air cleaner mounting bracket), nd the end of the cable housing is socketed into the moveable lever arm that operates the choke. 

So you might think you are pulling on the cable when you pull the choke knob, but what you are really doing is shortening the length of cable that is contained within the sheath, forcing the far end of the sheath to move relative to the fixed end of the cable. 

Photo attached. 

Sent from my iPhone

> On May 20, 2024, at 1:24 PM, lrc at red4est.com wrote:
> 
> 
> I've run a variety of HS carbs over the years and have never seen one where the sheath moves.
> Or any other carb with a choke cable for that matter.
> 
> 
>> On May 20, 2024 12:27:08 PM PDT, dave northrup <dave at ranteer.com> wrote:
>> I have HS4 carbs, newly rebuilt, which I am putting on an early 5 main MGB engine in an MGA.  I’m all set, except the choke mechanism.
>>  
>> A stock MGA cable has the sheath firmly attached to the knob assembly at the dashboard.  It expects the choke to be pulled on by the cable.
>>  
>> The HS4 carbs expect the sheath to move, the cable itself being held stationary at the carbs, while the knob is pulled out.  I’m trying to understand the mechanism.  Is it as simple as a sheath that is not attached at ether end and therefore floats, and changes position moving the choke as the cable is shortened by pulling the knob?
>>  
>> The simplest answer would be to just get an MGB choke cable, which I might do.  But first I want to understand the movement of the sheath, the cable, the knob, and the choke assembly.
>>  
>> Can anyone help me out here?
> 
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
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