The manual states that you are supposed to use a new clip every time. Yeah, right...
Anyway, I reused mine and for added security I decided to try this. I cleaned it good and smeared red RTV on the groove and the clip. I figure that a small piece of rubber can't hurt anything if it comes off and worst case it'll just get caught in the pump screen or filter anyway. What the heck, you use the same stuff on the headcover.