Securing outer choke cable?

[MorrisJohn]

I’ve just fitted a new choke cable, which is now operating correctly. (The old cable had become kinked during engine mods and as a result the outer shield moved with the inter cable.) The new cable was lubricated internally with a little oil overnight prior to installation.

Anyway, when pulling the choke right out unfortunately the outer is still moving slightly out of the hole at the abutment plate. I’ve attached a photo. It moves in direction of arrow. (Photo shows old cable in situ, the new one is now in its place. It doesn’t move as much as the old one did, but I still want to prevent it happening).

Does anyone else have this issue? Is there a method of securing the outer cable to the abutment plate to prevent this movement?

(The abutment plate is from a Morris Marina, as the carburettor is an HS4).

[geoberni]

You haven't adjusted it enough.
I'll see if I can explain this without confusing myself, or anyone else.

The way I look at it, the outer is just a loose flexible tube, what keeps it in place is the inner pulled tight.
Basically, adjust the tension on the inner until there is no slack on the outer, but the choke hasn't been pulled on.
Then lock it off.
Any pulling or pushing of the knob in the car, then moves the Choke on the Carb, but when totally pushed in, it's still just the right length that the outer can't move.
It's the principle I've always used on pushbike brakes.

[MorrisJohn]

Thanks Berni. I think I follow. So, slacken at the carb…pull inner through a bit tighter to increase the tension, re-tighten securing nut and that should do the trick?

Out of interest, I don’t suppose you know what size that tiny securing nut is?

[svenedin]

Thanks Berni. I think I follow. So, slacken at the carb…pull inner through a bit tighter to increase the tension, re-tighten securing nut and that should do the trick?

Out of interest, I don’t suppose you know what size that tiny securing nut is?

If it’s the same as the pinch bolt that secures the cable on the HS2 it’s a BA size if I recall correctly. A set of BA sockets and BA spanners is useful for various jobs on the Minor

[geoberni]

Thanks Berni. I think I follow. So, slacken at the carb…pull inner through a bit tighter to increase the tension, re-tighten securing nut and that should do the trick?

Out of interest, I don’t suppose you know what size that tiny securing nut is?

Yep, that's about it. The Nuts are probably BA, there's a lot of BA on SU products like Pumps and Carbs.

[MorrisJohn]

Thanks gents, much obliged.

[MorrisJohn]

Thanks again Berni. Adjustment made as suggested and problem solved

[geoberni]

Glad that worked.
It's one of those little things in life that once you know, you know, but not always easy to realise the physics behind it if it's your first time of seeing it.