Anything and everything Herald. Talk about anything from the first 948s to the last 13/60s.

Having bought a second hand Stromberg Carb to put on my Herald 13/60 I am somewhat puzzled by the operation of the throttle cable linkage. Having had experience only with twin SU'S I am struggling to understand how the throttle cable operates the carb throttle butterfly. I have located a murky photo in one of my manuals that depicts the arrangement but it is not all that clear.

The cable appears to operate from above the carb in the photo, however on my carb the pulling action of the inner cable would not do anything. It needs a push rather than a pull to open the throttle. As you all know cables cannot push.

There appears to be a requirement for a fixed bracket for the outer to be held secure for the inner cable to operate. Where is this bracket located, what does it look like etc?

The photo I have shows the throttle rod running through a spring with some sort of clamp arrangemnt for the inner cable. The outer cable is located in the slot on the throttle rod, with the rod hanging down beneath the carb. How does this arrangment operate the throttle?

Can anyone confirm what type of fitting is on the end of a standard Herald 13/60 throttle cable? I know it is a ball end that locates on the pedal, but what is on the other end?

Can anyone please tell me if there is a diagram anywhere that will make all this clear. I have several different manuals and catalogues but mysteriously the Stromberg thottle arrangement is not featured.

My carb incidently is indentical to the photo that Bill Davis has posted in the Herald archive: subject of which was also about throttle linkages.

I would be immensely gratefull for any help here, as I am reluctant to install the carb only to find i cannot run the car because of the throttle linkage problem.

Incidently my car currently runson 1 3/4" SU's. Any one intertested in them. They do run ok but i prefer to keep cars as original as possible so they have got to go.

Many thanks

Paul Holford 1971 13/60 convertable

The linkage is very difficult to photograph and even more difficult to describe (but I'll try anyway). The outer cable fits into the butterfly mechaism then the inner cable passes through a bracket where it is clamped with a cable clamp. The bracket itself is bolted to the exhaust manifold (I recently made a replacement bracket for an 'L' shaped piece of metal). I don't know if or where you can buy the genuine bracket or cable clamp but if you're a little handy with the tools they wont be difficult to make. I've tried to include a photograph taken just before I removed the engine last year, but for some reason it won't post. If you send an email to steve.cureton@eds.com I'll forward some blurred but hopefully useful photographs.

I see you live in Derby but I'm about 60 miles away in Telford. If you can't find an answer eleswhere you're welcome to come to Telford to take a look at my setup. If you want to do this just let me know via email.

It did post the image after all but what a mess!! Apologies if this causes peoples systemes to hang as it downloads. Perhaps Craig can delete it for me?

I'll get this right yet; I forgot to add that a rod passes through the center of the long spring, presumably to ensure it remains straight and therefore at full strength. When the accelerator is pressed the buuterly will open (the outer sheath moves with the butterfly while the bracket obviously remains stationary), then when you release the accelerator then the spring will push the butterfly closed. Hope that helps

Steve

Thanks a lot for taking the trouble to help.
What you have said does make sense.
I'm sure i'll be able to fabricate a bracket to suit.
Thanks again

Paul Holford

Sarah / Paul

What you may have at the moment is the carb and manifold off a Toledo or 1300 Dolomite.

Is the engine from one of those as well??

The SU is a preferable carb for ease of setting up / tuning / cheaper parts, but it is personnal taste entirely.

Anyway, the throttle linkages are totally different and that is probably what your problems are, a hybrid of the 2 types.

I would stick with the SU if it is working at present.

If you have twin SU's, probably off a mk3/4/1500 spitfire, then a return to a single Stromberg may be in order to simplify maintenance.

Cheers

Colin

Section : Carburettors

Throttle cable linkage Stromberg Carb

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