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Old 13-04-2015, 11:01   #1
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Wanted: Henderson MkIII pump kit

hello;

i have an old (old old old) mk3 manual bilge pump on my (no longer new to me) boat. it's oval shaped with a lever tightening the front access plate, type P7/L MKIII. it no longer works - and i bet hasn't in a long time.

i contacted Whale Pumps and it's a model they discontinued many years ago (we knew that), and they couldn't point me to place where i could buy the kit, just said they believed the current (mk5) model uses the same diaphragm, and steered me away from making my own flapper valves (which i believe are the problem).

i searched the forum and didn't find much. any recommendations? i remember reading the mounting patterns are different between the mk3 and mk5 - so even if i were to buy a new mk5 i'm not convinced it's a drop-in replacement, and i have enough projects on my hands as it is. is anything they sell today - like Whale Spares Kit - going to fit?

thank you!
anton
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Old 13-04-2015, 11:28   #2
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Re: Wanted: Henderson MkIII pump kit

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Old 13-04-2015, 11:29   #3
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Re: Wanted: Henderson MkIII pump kit

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Old 13-04-2015, 16:46   #4
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Re: Wanted: Henderson MkIII pump kit

I've made flapper valves with acceptable results. You can get nitrile in all thicknesses, and the shop I walked in to - commercial hose and rubber supplier - have me the little I needed. Not much to lose... if you are worried about diesel/oil you'd want viton rubber. Good luck.

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Old 14-04-2015, 13:29   #5
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Re: Wanted: Henderson MkIII pump kit

Henderson were a company that was located on the Isle of Wight that was bought out by Munster Engineering in Northern Ireland. I have a Henderson Chimp Mk 111 and Munster/AKA...Whale supplied a top frame made for their urchin and it fitted exactly. So perhaps the other parts of the Urchin fit the Chimp ? unless the pump in question is even older than a henderson Chimp Mk111 and therefore totally different? which would explain why Whale were unable to help.
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Old 05-06-2015, 20:17   #6
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Re: Wanted: Henderson MkIII pump kit

To complicate matters, Whale USA was just bought by Attwood. Things might be screwed up there for a while. Try smoothing the valve seats and if you have to try making the valves as Erik suggested.
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