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MG MGB Technical - HS4 float chamber

Hi.

I'm the owner of a '73 BGT that has HS4 carbs. The rear float chamber is throwing away fuel to the floor by the overfill hose. I've tried several washers on the needles to no avail.

The problem only happens when ignition is on but engine is not running. The fuel pump never stops and fuel eventually is thrown away.
One more thin washer and the needle will stop fuel coming in. So I don't know what to do.

Please advise.

Thanks,

Valter.
Valter

Sounds like the needle jets are leaking so get new needle jet assemblies and reset correct float heights. Rich.

Rich

I'm thinking that the hinge pivots on the floats
themselves are worn and sloppy.

When this happens, then putting washers under
the float needle assembly is mostly a temporary fix
- if it works, at all.

The only real fix for this is to get new floats and
pins. I'd advise changing the floats on both the
front and rear carbs as they tend to wear-out
as a pair.

Always check the float level before final installing
on the car.
Daniel Wong

This thread was discussed on 04/05/2005

MG MGB Technical index

This thread is from the archive. The Live MG MGB Technical BBS is active now.