Thank you all.
20 PSI at idle, while driving it's around 40 PSI.
I am happy to hear your opinion that it's normal.
The problem accures when the engine is hot and in idle.. the
engine starts to vibrate ... even strong vibrations until it shuts down
Fuel filter in new, air filter is OK.
I cleaned the Carburator with spray.. looks new..
When the engine is cold and in idle.. it does not vibrate