Fuel Draining From Filter

If you put a pressure gauge on the line my bet is you will see the pressure remains basically normal for a long time.

My bet is the alcohol blended fuel (ie standard pump gas) is vaporizing at shut down and you are seeing the vapors rising to the high point.


Also in just a few revolutions the pump can refill the filter IF it was bleeding back.

Liklyhood of the "problem" being a bad fuel pump on 2 different engines is pretty small.


Lastly, like testing for COVID many more people will show as having it then the symptoms would suggest.


If you did not have a clear filter you would not know you have a "problem" and with no symptoms you would not care.