Rough running 912ULS after mx

Do the colour of the plugs show any differences?

Is there any way that something could have entered the inlet manifold whilst the carbs were off for service?

We sent our carbs there for a 200 HR because we had a lot of other work on our P2006T to do. When we reinstalled, with new carb sockets, etc, we found that our LH engine was running very rough. Looking at the plugs and taking readings of the exhaust pipes, we found the 1/3 cylinders running lean. The idle jet in that carb had been reinstalled with blue gunk on it, and when removed had blue gunk in its home as well. We have to run 100LL and it had not been properly cleaned. We cleaned it out, and used a tip here about taking one strand of a wire through the hole in the middle and it ran great.

Called Lockwood and they told me they would talk to the shop about it.

Scott Cote wrote:

We sent our carbs there for a 200 HR because we had a lot of other work on our P2006T to do. When we reinstalled, with new carb sockets, etc, we found that our LH engine was running very rough. Looking at the plugs and taking readings of the exhaust pipes, we found the 1/3 cylinders running lean. The idle jet in that carb had been reinstalled with blue gunk on it, and when removed had blue gunk in its home as well. We have to run 100LL and it had not been properly cleaned. We cleaned it out, and used a tip here about taking one strand of a wire through the hole in the middle and it ran great.

Called Lockwood and they told me they would talk to the shop about it.

I think this is where our issue lies as well.  We removed the idle jets, and one appeared very "worn" looking with the hole on top being out of round. The smaller holes may have also had some debris that we removed with compressed air.  

The carbs are back on the way to lockwood for another look, and new idle jets to be installed......