Dellorto question - starting to run rich Options

[bandjoey]

2.0L w/Dellorto 34's. Been running this setup for about 10k miles since they were installed, and car runs good.
These were suggested by CB when I installed the carbs.

140 main
2 emulsion
60 idle
Valves and timing about 2k miles ago

Recently burning more gas, a rich smell, and a sooty tail pipe and no tail pipe smoke.
Car tuns as always. Nothing new in drive ability.

The CB book suggests going one size smaller on the mains for a sooty tail pipe. . However, this is a recent issue.

Other Things to check over? Do jets wear out an need replacement?
Thanks!

[r_towle]

1)Check your fuel pressure.
2) after sitting for the winter you may have junk inside. That could, and does, get lodged in the seat valve that it attached to the float. That can hold open the float providing too much fuel to the carbs, run rich
3) timing, dwell, point, plugs, cables (10k is too long imho)

I use an electric fuel pump and I have a fuel shut off valve so I can turn off the fuel while the car is running and let it die. No fuel in the carbs for winter. It's stock in a 356, but they have mechanical fuel pumps.