Hey guys its been a while since I'e posted to the boards. Just wanted to let you know were still here and that the midwest will soon be free of all this snow we've been getting. Hopefully by June anyway. I say that because I want to try out my second Nautilus this summer. I purchased it from a widow in Texas and it came with a regulator but no hose. I believe I have another hose anyway so that shouldn't be a problem.
Unfortunately it didn't come with the swell bag that my first one did:
I posted those because I believe someone once suggested documenting the range of serial numbers. Note the difference in labels. I'm not sure if either have been changed by their previous owner, or if there was a change during production. Please feel free to post pics of your own.
DD, interesting that they changed the font/type-face:
I think I like the one on the left: while not as easy to read from a distance, it's much more elegant, giving it much nimbler feeling, while the other looks more cumbersome and clunky (HUH--they're the same thing!) I also like the nice yellow safety/barricade-stripes!
Do you have any of those swell metallic-blue explody-tanks that went with them?
I think I'll be matching a couple newer yellow tanks to these, JB. The 'ol blue one is retired from service as are many of my 6351 tanks. I do have a few but any with signs of hard use, corrosion or anything like that have been taken out of use. Those are easy to replace. The UDS-1 tanks are the only ones that I'm going to have a tough time replacing and so I will have to keep them around. I'm pretty sure the yellow stripes were added by the previous owner, and I too like the way it looks so I'm keeping it the way it is. I do have to go through the regulator as it wants to constantly inflate when the button is pressed. Hopefully an easy fix.
I just looked, and I have two Dacor Nautilus units. My main one has a regulator, and my first one does not. Here are the serial numbers of mine:
Serial No. 2581 Serial No. 1328
Both of mine have the lettering like the one on the right of your photo.
My serial number 1328 has a name etched into it, E.W. Nitcher, and an Oregon driver's license number, which I won't place here. I got it from Eugene Skin Divers Supply in Eugene, Oregon, and I think that Mr. Nitcher has passed. The dive shop kept the weights for years for me, and when I failed to come down and pick them up, sent them with another diver to get to me.
I am currently using mine with a Dacor Pacer regulator, but may update that to a Dacor Enduro as I recently received for free from my LDS several Dacor regs they had been given. I have also used mine with my Trieste II regulator, and had a problem when I used it with my Hydro Twin, as I set the interstage pressure too high, and it drained my AL 80 tank (the Nautilus regulator is a downstream regulator, and it caused the unit to bleed air throughout the dive without changing buoyancy) causing an out-of-air situation at the end of my dive with Marion. I'll add some photos later.
The one on the right, Key is Patent Pending on the decal. Could have changes sometime, but doubtful. I would guess repro decals on the left one.
I suspect so too, Karl. Especially if both of Johns, one of which has a later serial number, both look like the one on the right. I don't believe that many were produced either. Wish we had a production number or serial range.
Thanks for posting those, John. Just the inspiration I need to get out and use my Nautilus' some more this year. Along with all the other funny pacs that I've accumulated of course. Hopefully I'll get my Atpac working this year too.
It looks like Don will get my weight mold, plus most of an Olympic 400 regulator soon. Here's the parts diagram for the Olympic regulator:
I am missing the diaphragm ring for this regulator, and if any of you have a spare one, Don could use it. This is the regulator that goes with the Nautilus. I've got another one, which I took apart recently and got back into serviceable condition. They really breathe well. Mine had a high pressure leak, which I found to be the little O-ring (#33G part # D161) that wasn't lubricated correctly.
Dacor went through a few versions of HP diaphragm. At one point, they used a very thin material for diaphragm with a thick stainless-steel washer. The thin diaphragm was mainly included on newer (than the olympic) Pacer first stages, but was installed during servicing in this era reg. Any idea about the thickness of diaphragm on this reg?