February 22, 2017 at 1:05 am #6392
Yes; I know that the diaphragms are sold by various suppliers (OMC #305715 and #302563…..Plastic Button/Metal Button) but most likely they will not be available for much longer and I would like to get a handle on what the material is so I can make my own.
Can anyone provide a source for the bulk diaphragm material for the OMC pressure tanks? Or…..can someone tell me exactly what the material is called? Nitrile Rubber? And the appropriate thickness etc.
US Member - 2 Years
Topics: 3February 22, 2017 at 1:14 am #53392
As long as there is a demand, the part will be available
US Member - 1 Year
Topics: 48February 22, 2017 at 1:23 am #53394
I believe it is called Buna n nitrile. Someone here has used some rubber gloves to make diaphragms. I’ll see if I can find the posting.February 22, 2017 at 2:30 am #53396quote Wedgie:
Yes; I read that just before posting here. Here’s the post:
Can anyone tell me what thickness the Nitrile is that OMC uses in their diaphragm? I just found this one source that might have what we need if I can narrow down the thicknes:
http://www.warco.com/pdf/WARCO-BILTRITE … atalog.pdf
Around pages 13-14 there are various Nitrile products that should work?
Canada Member - 2 Years
Topics: 431February 22, 2017 at 3:24 am #53401
The BuRP tank diaphragms I have mike out at 0.030" which is thicker than the fuel pump material. A few years back TT posted it or the pump material in 36 or 48 inch wide rolls and I believe McMaster or Grainger was the source. The diaphragms also have a woven reinforcing in them.
A piece of fuel pump diaphragm material measured out at 13 thou.February 22, 2017 at 5:01 am #53413
Here’s the post I was referring to 😉
viewtopic.php?f=13&t=3556February 22, 2017 at 3:07 pm #53424quote Wedgie:
http://www.ebay.com/itm/One-pair-North- … SwpDdVJ-~8
That seller is still offering them; $1.79 plus shipping. Although as Mumbles states….that material may work for fuel pumps but a thicker re-inforced material would be required for the tank diaphragms.
So; the search goes on. I might stop by my local Grainger and; armed with the thickness (0.030") ask if they have something suitable.
Does anyone know if the diaphragms included in the kits that Laings or Vintageoutboards sells are genuine OMC….or something a bit different?February 23, 2017 at 1:59 am #53450
The diaphragm I have from Vintageoutboards mics out at .035, and the dried out original one it is set to replace is around .027 or so. The new one looks pretty good though I doubt it is OEM. Maybe one day I’ll get around to installing it. Perhaps when my order of 2 line fuel hose arrives in the spring 😎March 1, 2017 at 1:49 am #53659
Well….I placed my order thru Grainger today. Their part Number #1DPZ3. A 12" square of the Buna-N/Nitrile rubber sells for $4.24….shipped to a store for free. I figure I can make as many as 12 diaphragms from that 12 x 12 sheet ….so it’s worth a try.
They sell a variety of Nitrile materials…..they differ in hardness. elongation , and various other factors. I’m hoping that the one I picked will work ok.
- You must be logged in to reply to this topic.