Mopar Muscle Association UK

difficult to see but does the needle valve, where it touches the float, drop off the edge of the bump and get caught up?

try making that bar between the float unit and pivot pin completly straight then readjust the float height.

Shouldn't the spring stop the float bottoming out in the bowl?

db wrote:Shouldn't the spring stop the float bottoming out in the bowl?

The spring does not do that at all at the moment. Its next to pointless.

the needles does not seem to foul on the float stem.

This is where mine sits.
The spring is a totally different design to yours so no point showing a pic of that but yours must be assembled wrong to sit so low.

I will lob this 750 vac sec Holley I have bought on, see if it works okay

I will get some new floats bought and see if they make a change to how everything sits.

Thank you db.

J

Why not just swap the float bowls over centre hung and side hung bowls are interchangeable ...

Guy wrote:Why not just swap the float bowls over centre hung and side hung bowls are interchangeable ...

I believe the fuel inlets are handed, so whilst a Primary bowl may bolt on, it will not work in practical terms.....I stand to be corrected..........

Guy wrote:Why not just swap the float bowls over centre hung and side hung bowls are interchangeable ...

swapping the front to back or primary to secondary, that would mean everything comes in on the other side of the carb and I would be moving the problem from one side to the other.

I won't get rid of the carb, perhaps it just needs a fettle, new floats and it should be fine.

GJUK wrote:This is where mine sits.
The spring is a totally different design to yours so no point showing a pic of that but yours must be assembled wrong to sit so low.

Is the red rubber check valve fitted - red arrow? I can't see this. This acts to prevent fuel flowing back into the fuel bowl when the accelerator pump is operated If not there should be a ball bearing affair there instead that does the same thing. The red check valve should be in your rebuild kit

You can check your float level dry, just turn the float bowl upside down and adjust level until the gap (Yellow arrow) measure 3/8"

BTW, the check valve has a long end on it to stop the float bottoming out

Hi,

Interesting. I can not see that is in there at all.

Let me check the box and see if I can find that spare.

Well spotted.

Jon

You will need to take the diaphragm pump & diaphragm off to check. Your friend might not have replaced this as you have a 50cc pump there and 30cc diaphragms generally come with a standard kit

Double pumpers use a check ball, Vac. secs. use the red rubber

Sorry chap, I would disagree. Here is a brand new one here direct from Holley that has the red rubber umbrella. I have seen many older units with this too.

Despite all that, looking at both your float bowls, the bowl floor is slightly raised in the pump area so guess you have bearings in both
My money is still on the needle valve