Engine running rich and lumpy

[Milton]

1275cc Marina engine in my Minor has been running fine. That was until last week when Milton junior pulled the choke out a little far. (Not his fault. I should have made it clearer what to do!)
Sorted that issue only for engine to start running rich and lumpy like my porridge.
Mechanic friend popped round and thought I'd done something daft (again!!). However it was something in the carburettor not doing what it should and not an instantly fixable fault. He thought the jet was the most likely cause of the problem and after a wee hunt in the margins here that seems a possibility.
Any other suggestions, and if it is the jet is it a case of removing the carburettor and replacing the jet?

(Mr bmcecosse has suggested that I change the current 1.25" for.something a bit bigger, so he may have nipped round when I wasn't looking and hastened the demise of the old asthmatic mechanical!!j

[bmcecosse]

I can't see how pulling the 'choke' - (which isn't a choke at all) could do anything to the carb....Is the jet now fully UP when the 'choke' control is pushed right in? It is possible that pulling too far could have moved the clamp for the outer cable sheath - and that is somehow holding the jet down - so enriching the mixture. Any chance of a picture or two of the carb - especially underneath??

[Milton]

Firstly apologies for the delay in responding.

A holiday in glorious mid-Wales followed by a couple of days in Chester, refitting my lovely resprayed bonnet and innumerable small jobs along with a visit to the air display at East Fortune nr Edinburgh today, have been the cause of my tardiness.

Below is a photo of the carburettor ......
[frame][/frame]

The car continues to run like my porridge, and there's doubtless something I've got wrong, so any suggestions would be most welcome. (I've a few other pictures and could post them if needs be.)

If the carburettor has to be removed, stripped, cleaned, reassembled and then reinstated, I'll be asking a lot more questions, and doubtless cause a few of the more mechanically minded amongst you to shake your heads. I won't therefore be posting a video of my efforts on Youtube!!

[bmcecosse]

Looks like it's 'home' ok. What colour are the plugs after it's been idling for a few minutes?

[Milton]

A bit of heavy right foot (accelerator rather than break!) and a bit of slight adjustment of screws and nuts by the carburettor and hey presto ................
she's running fine.

Thanks Roy for the suggestions, I'm guessing that there was just a little bit of something where it should not have been.