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Old 29-10-2017, 19:00   #1
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Identify this Bronze Diaphragm Bilge Pump... need to service

Hi
I have a massive manual bilge pump on our Hans Christian. Obviously weight was not a design constraint. That is one big hunk of Bronze.
It looks a lot like an Edson unit, but they usually cast in their name.
I am looking for help sourcing a service kit for it since it is out of the boat right now. I'd love some help to identify it.
Jim
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Old 29-10-2017, 19:11   #2
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

Try commercial marine stores. Pumps like that were almost standard on larger wood fishing boats. Also the makers of bronze fittings use to make deck pumps.
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Old 29-10-2017, 19:21   #3
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

Sure looks like Edson. Are you sure the name isn't cast in the plate on the diaphragm?
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Old 29-10-2017, 19:23   #4
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

Sure looks like an Edson pump. Have you checked to see if the parts for their pump might fit this one. The Edson pumps work really great. Had to pump water above the floorboards out of my boat when I got hit by a storm with cockpit scupper hoses disconnected. Made short work of a lot of water as my boat has a proper sump.
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Old 29-10-2017, 19:46   #5
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

It is an Edson. They are still made but in your choice of bronze or aluminium.

Edson Emergency Bilge Pumps

Repair kits are also sold. Order from any Edson retailer. Don't be put off by all the variations there are really only two sizes.

https://www.edsonpumps.com/products/...gm-pump-parts/

They are a fantastic pump with huge output as you would expect from 2" pipes.
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Old 30-10-2017, 19:49   #6
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

I rebuilt mine...same as yours. Ordered kit from Jamestown I believe. Easy rebuild. Yours like mine is bottom suction so will have the kit with the round and square check valve. Be sure to add penetrating oil to the bronze bolts before you try to break them loose. Mine were in there good, and I think I sheared one. Diaphragm comes in 3 different materials, neoprene, viton, hypalon I think. I went with the middle cost one, which will last just a long under normal conditions. In fact, the one I pulled it was still pretty good, but the replacement was cheap insurance. It's the good sealing of the check valves that will pay dividends.
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Old 31-10-2017, 04:06   #7
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

Well I have ordered the Edson Parts, and I hope they fit. I am pretty sure it is not an Edson as they cast their name into everything. But it looks like an excellent quality knock off.

Jim
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Old 03-11-2017, 09:46   #8
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Re: Identify this Bronze Diaphragm Bilge Pump... need to service

chinese knockoff of edson and others who made pumps for taiwanese boats.
between 1975 and 1979, relations between china and republic of china, aka formosa aka taiwan loosened some and trade opened between the two. seems many taiwan built boats are proof of this gradual change in relations. most taiwan boats use usa traded goods, these pumps are chinese builds found also in formosa 51. later builds of formosa 41 and others with manual bilge pumps. i just recently learned this as i thought our parts were usa based due to the position republic of china holds as protectorate of usa.

mine no longer has the pump but i would love to know where these parts are located . please update as you are able.
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