Is this a Whale Gusher MK3 foot pump?

[flee27]

I need to rebuilt this foot pump on my new to me Sabre 42. Thanks for helping to identify this pump

Foster

[Tusitala]

Yes it is. We rebuilt both of ours, one twice and it still didn't function properly so ended up replacing it.

Pat

[Jim Cate]

IIRC it is hard to tell which MK it is from such a view. The differences are in the way the diaphragms edges are sealed and are not visible from the outside. There is an identifying label on the exterior of the pump, but I don't remember the exact location.

Replacing the rubber bits is a somewhat frustrating job in that it isn't easy to get the springs compressed whilst installing the screws that hold it together without disturbing the seals. I ended up using a big C-clamp to do the holding whilst I did the screwing... and eventually I avoided "screwing up" and it worked. On another pump after finally getting it back together I found a small crack in the plastic housing and that was the end of life for that pump... so do a good inspection before investing too much time or money in repair.

Jim