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MG MGB Technical - Choke fitting to carb
The car I am restoring was bought as an abandoned project. A lot of the bits were in a heap in the boot. attached is a photo of how I think the choke and carbs should be, less air cleaners as I need to balance the carbs.
If any body could tell me whether this is correct or not that would be great.
Ps 1 photo with this and another with the next post as I can't find a way to get 2 photos per post.
| Hi TS KING,|
On an early mk1 with HS4 carbs. your fittement is the right one. Tie the cable and pull it from dash knob, both jets will then slide down.
Its correct apart from the horse shoe should be bolted to the other side of the carb with he bolt going through carb into horseshoe.
I also notice that the heat sheild does not have any insulation on it but you do need to put some on to stop vapourisation.
|And don't forget the spring, in the middle hole, that goes to the choke linkage. This returns the the choke cable to its fully seated position. RAY|
As Ste said the horseshoe thingy goes on the back and normally is held in place with the air filter bolts.
I found this to be a damned nuisance as the choke couldn't be connected up till the filters were fitted, so I came up with a mod that solved this problem, see photo.
The length of the 5/16 UNF threaded rod is 96mm from the aluminium face to the end, plus whatever is needed behind the carby. The nuts are dome nuts that tighten up nicely, with the standard rubber and steel washers.
The choke return spring is not attached in the photo.
|Thank's guys, this heat shield is only to test the engine, can you buy the insulation separately or do you have to purchase a complete new one?|
Thank's about the horse shoe, I tried all positions but didn't try on the back.
A good mod Herb, where did you get the threaded UNF from? it's getting harder to get the old threads in Europe.
Thank' a gain to all, this is a great forum
| TS King,|
Sorry, I answered on the cable routing principe only.
I hardly could imagine what "horseshoe" was standing for...
My local nuts and bolts shop still has the old imperial threads, quite expensive though, $30 (~15 euro) for a 900mm rod.
5/16 is 7.938 mm, nearly 8mm and a 24 tpi is a pitch of 1.058mm, so you could try 8mm fine rod, and if necessary tap the threads to 8mm fine, pretty close to start off with.
|Much easier to get a couple of 3/4 x 5/16 UNF bolts to temporarily attach the horse shoe whilst tuning. You don't need the air filter alloy plates when tuning & balancing.|
This thread was discussed between 14/02/2010 and 16/02/2010
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