Hand bilge pump identification

[sarabande]

Today's locker cleaning revealed a fine specimen of a handraulic bilge pump. It is mounted through-deck in the cockpit, whence it can be operated vigorously. Except that the output is less than I might reasonably expect from a frightened man.

If anyone can identify it, I shall be very grateful, as I can then see if a service kit is available.

I might even treat it to new jubilees and clean the intake and outlet pipes as they are a bit gungy.


Thanks

 

[SaltIre]

Henderson pumps had model numbers beginning with MH...
Mack Engineering :: WHALE :: HENDERSON PUMPS & SPARES

 

[Boathook]

Looks like a Henderson with a quick release cover for clearing blockages. Looking at the picture and condition it might be better to replace it but still worth taking to bits to start with.

 

[andsarkit]

Henderson MK3. I don't think you can still get spares.
Possible problems are a split diaphragm, leaking valves or leaking top cover seal.
Diaphragm is just a flat rubber sheet.
Flap valves can be pulled off the screws and reversed if they don't sit flat. (no need to remove the screws)
The cover seal is a special moulding and not available. I gave my last spare seal to another forum member.
Sometimes the top cover is bowed by the clamp. You could drill and tap for 8 screws to fix it more securely (moulded bits are there for that) but this would make it slower to clear a blockage.