If this has already been discussed, I apologize for the duplication.
I was back-and-forth on an e-unit, had everything right again and again, when I finally figured out that I could test the e-unit separately from the motor.
Head's up: I found the brass loop connected to the plunger was binding on the lower tabs of the rocker portion of the unit. Dremeled the overlap off and it finally works the way it is supposed to.
I hope this is of some interest to members who are similarly wrestling with e-unit gremlins.
