MGB - SU carb dumping fuel

MGB - SU carb dumping fuel

Author
Discussion

MSHolme13

Original Poster:

15 posts

65 months

Monday 8th October 2018
quotequote all
Hi all.
The back SU carb on my '78 BGT is pouring fuel out of the overflow pipe. Literally gushing out. The car as been off the road for over 12 months awaiting a new distributor, which I fitted yesterday. It started fine and ran OK for a few seconds, then became very lumpy as if misfiring and the fuel squirted out.

I'm not too hot on this, but this is something to do with the float chamber, correct?
What do I need to do?

Thanks for any help.

bogoatv8

23 posts

91 months

Monday 8th October 2018
quotequote all
Sounds like float valve stuck - quite common...ask me how I knowhttps://www.pistonheads.com/gassing/imgs/12.gif

bogoatv8

23 posts

91 months

Monday 8th October 2018
quotequote all
Sonds like float valve stuck - quite common... ask me how I know https://www.pistonheads.com/gassing/imgs/12.gif

MSHolme13

Original Poster:

15 posts

65 months

Monday 8th October 2018
quotequote all
Do I need a new part, or can I just 'un-stick' it??
Looks like it's carbs out as it's the later SU with the float chamber at the bottom??

Flying Phil

1,578 posts

144 months

Monday 8th October 2018
quotequote all
MSHolme13 said:
Do I need a new part, or can I just 'un-stick' it??
Looks like it's carbs out as it's the later SU with the float chamber at the bottom??
You should be able to un-stick it, clean it up and put it all back together. It often happens if the car is not used for a few months.

MSHolme13

Original Poster:

15 posts

65 months

Monday 8th October 2018
quotequote all
Great, thanks. I'll take it out and have a look...

MSHolme13

Original Poster:

15 posts

65 months

Tuesday 16th October 2018
quotequote all
Just took off the carbs and the floats have fuel in. I assume there shouldn't be ANY fuel in them??

Flying Phil

1,578 posts

144 months

Saturday 3rd November 2018
quotequote all
Sorry for slow reply...yes you are correct - floats should not have fuel in them. If they are brass and you can find the hole they can be soldered to re-seal them, plastic floats might be able to re-seal with a good glue......after emptying!