Carburettor trouble

The base of the carburettor has warped over time causing air to be drawn into the manifold. This causes a rich mixture and rough running.

Here we can see the carburettor base warped by about 1.5mm.

Thanks to Darrin of Citroen Classics for the advice. This is a common problem and with some careful filing the base was straightend and the holes for the studs re-drilled at 90 degrees. While the carb was off it had a good clean with all the jets blown out, new gaskets etc. The carb was refitted and the mixture and idle speed adjusted.

Float height cheked at 5mm and new gasket fitted.

The carburettor base after filing, a little blue hylomar around the edges just to make sure.

New insulator and gaskets on inlet manifold.

Carburettor refitted ready to adjust mixture and idle speed.