Weber 42 DCOE Carburettor rebuild

January 2025:

Poor running on this Maserati 3500 GT called for inspections into Carburettors.

As we were unable to balance them, the decision was made to remove them.

All 3 Weber 42 DCOE Carbs and spindles were stripped down and we found sticky bearings due to grit, the butterflies lactated into position and not centralised. We carried out a full overhaul and replace, bearings, springs, seals and gaskets, centralise butterflies and check for closure on both butterflies. Loctite spindle screws.

The carburettors are now complete. Everything was available except the spindles. I replaced the sticky bearings and then fitted spindle shaft kits to do this everything had to be removed. I also found the chokes sticking so they now close off.

One carburettor has 0.03” and 0.02” gap previously 0.012”
The other carburettor has 0.01” and 0.03” previously 0.014”

So I’m very happy how they have turned out.