Subject: [Mgs] HS4 Carbs

From: dave northrup <[email-masked]>
Date: Mon, 20 May 2024 19:27:08 +0000

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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 th=
e 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 statio=
nary 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 e=
nd 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?

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<p class=3D"MsoNormal"><span style=3D"color:black">I have HS4 carbs, newly =
rebuilt, which I am putting on an early 5 main MGB engine in an MGA.&nbsp; =
I&#8217;m all set, except the choke mechanism.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">A stock MGA cable has th=
e sheath firmly attached to the knob assembly at the dashboard.&nbsp; It ex=
pects the choke to be pulled on by the cable.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">The HS4 carbs expect the=
 sheath to move, the cable itself being held stationary at the carbs, while=
 the knob is pulled out.&nbsp; I&#8217;m trying to understand the mechanism=
.&nbsp; Is it as simple as a sheath that is not attached
 at ether end and therefore floats, and changes position moving the choke a=
s the cable is shortened by pulling the knob?<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">The simplest answer woul=
d be to just get an MGB choke cable, which I might do.&nbsp; But first I wa=
nt to understand the movement of the sheath, the cable, the knob, and the c=
hoke assembly.<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"color:black"><o:p>&nbsp;</o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"color:black">Can anyone help me out h=
ere?<o:p></o:p></span></p>
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