The original style choke cables are put together with three parts:
1) a shaft that has the knob on one end and the wire on the other
2) a tube that is fastened to the dash through which the rod
moves
3) a little scrap of metal (key) that locks the cable.
Along the shaft are a series of v-shaped notches (not exactly v-shaped,
they're more saw tooth shaped). The key fits in a slot
cut across the tube. The key is held in by a 1/2" wide circle of spring
metal that surrounds the tube. When the shaft is turned so that the
key and the notches line up, the key slips into a notch and holds the
shaft in place. When you turn the shaft from this position, you turn the
notch out from under the key til it rests on the round part of the shaft;
you can then move the shaft in and out.
I think the heater valve cable is a much better design: the shaft is hexagon
shaped, with a series of circular grooves cut around the shaft, and
a ball bearing slips into and out of the grooves. I don't know about
replacement cables, but the heater cable in my car is 6" too short
to use as a choke cable. You could have the right knob, but you couldn't
have the correct nut. No loss in my book, that would be better than
the lawnmower cable and pair of pliers that I currently use.
At 10:06 PM 2/20/99 -0500, you wrote:
>Message text written by Cliff Hansen
>>The SU6 carbs use a pull-twist-lock cable, since they have a
>return spring on the jets. I've had no end of trouble with mine,
>and had given up on fixing it correctly.<
>
>Do you know the mechanism in side that does the locking? Where is the lock?
>
>In my ancient experience, I seem to remember that if your were unwise enough
>to attempt to move the choke in the "locked" position, it seemed to weaken
>the lock somehow.
>
>I have not dissected any cables to understand the lock mechaism. I have
>ALWAYS had to use both hands when starting from very cold. I am used to it.
>
>
>Very good theft prevention. I can't tell you how many times my Austin had
the
>battery killed by dumb service people trying to start it without the choke!
>This was by people who ought to know better. Not that the symbol for the
>choke is useful!
>
>-Tony
>
Cliff Hansen
chansen@anr.net
1966 TR-4A CTC 64615L
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