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MG Midget and Sprite Technical - SU carb body / float chamber

Hi , I had an issue at the weekend where my front float chamber decided to try and part company with the carb body by the bolt rattling loose. Luckily I had some cable ties to get me home from the MASC Gaydon event. I have taken it apart and I need to replace the plastic grommet that gives the angle as it’s all chewed up . My question is in the photo there is like a metal pin pushed in to the carb body, is this correct. I seem to remember for other carbs it was like a cast aluminium lug as part of the carb body. Has someone bodged it ?


Mike Fairclough

Mike
Does this help? Can't see a pin.

Bill Bretherton

That’s really helpful thanks Bill , it looks like someone has replaced the lug with a pin , maybe it broke off at some point . I’m hoping it will still work . I have uploaded a clearer picture hopefully.

Mike Fairclough

I reckon that would work Mike as long as the angle is correct.
Bill Bretherton

In both versions, it appears to be about mid point to the crescent that the rubber insert fits to. Not quite clear on your photo Mike, but it looks like a different casting number so maybe a revision of the body rather than an alteration?
GuyW

Thanks Bill and Guy , I have ordered a new rubber insert so will try that and see if it gives the correct angle with the pin. I think it’s the rubber insert that sets the angle for various applications, vertical, 20 or 30 deg from what I have read so don’t know why anyone would want to remove the cast lug and put a pin in its place unless it sheared off at some point.
Mike Fairclough

Mike, I dont know, but wondered if the pin was a factory version, and related to the different casting number.
GuyW

This thread was discussed between 13/05/2024 and 15/05/2024

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