Type 6 Carb Fuel Height

[tony.barnett]

Can someone confirm exactly what the fuel height should be in a 76 or 276 carb please (I'm assuming both would be the same - maybe they are not...).

I've searched the archives and found various answers - just below the jet block, just below the top of the needle jet, just below the air screw - all seem to be different. Is there a definitive answer?

[Roger Gwynn]

Yes, it took me ages to find it and correcting it on my VA made a lot of difference. It should be at the top of the union nut (big one on the bottom of the mixing chamber)

[tony.barnett]

Yes, it took me ages to find it and correcting it on my VA made a lot of difference. It should be at the top of the union nut (big one on the bottom of the mixing chamber)

When you say `at the top' Roger, do you mean the top of the threaded bit that screws onto the carb body?

[Roger Gwynn]

Yes, at the top of the big nut on the bottom of the mixing chamber 6/062 thingy

[cmfalco]

Yes, at the top of the big nut

Although the correct level is there, the reason is somewhat of a coincidence. The level needs to be slightly below the pilot air screw for the pressure depression in the main bore to lift the fuel into the air stream. The body of the carburetor could have been designed such that the nut was lower, in which case it wouldn't be a good reference location, because the level still would need to be slightly below the air screw.

[tony.barnett]

Thats grand - thanks for helping.

[cmfalco]

At least in my carburetor, the gasket shown in red was a bit troublesome. Although both sealing surfaces are in good condition, when I fit the gasket "dry", fuel managed to seep past it following the route shown. I then lubricated the gasket with EZ Turn petcock lubricant, which doesn't dissolve in fuel, and had no more problems.