Yes.

There is a diaphragm on the fuel pump lever arm that goes to the cam. It gets torn and the oil slung off the cam leaks out the fuel pump weep hole that's there to keep a leaking pump from flooding the oil sump with fuel.

Set the motor on tdc #1 before you remove the old pump to make the lever spring relax as much as possible, or removing/installing is even more of a pain.

Not responsible for advice not taken...