Walbros
Bad connections, voltage problems & undersized wiring can cause pump failures as well.
Are you using a new fuel sock with the new pumps?
I've used hundreds of Walbro pumps & have yet to have a pump failure.
I'm not saying failures are not possible, but usually there is a reason, & with 3 failures, I would be looking for the cause.
Also remember that Ebay has some counterfeit pumps out there, so beware of what you are buying.

