Steve, your test help a little. Mixture was too lean. After adjustment engine could work at less RPM, than before. But it has stopped after a minute of running and as usual didn't want to start again.
Now we can hear a whining sound. I did not determined from where it came. Somewhere from fuel distributor. Or maybe from one of the injectors on the right (2-nd) row of cylynders.
All of the spark plugs are flooded with fuel again. We cleaned them, but engine did not started on second try.