How many of you guys have had problems with your electric fuel pumps? I'm on # 2. The first was a Mark X, the current on is a Hangar 9. Both worked trouble free for a while, and then are non stop problems after being in service for only a few months. I am using the Du-Bro fueler on the plastic fuel bottle. All the tubing is in good shape. What goes? Any ideas?

Thanks!