Only underwater. I'm convinced it's possessed by an evil sea demon. Gonna break it down. and see if I can determine anything..
All good info Bill. Thank you. And no, it does not make me feel any better but I appreciate the empathetic ear.antique diver wrote: ↑Tue Mar 03, 2020 10:20 amI didn't mention lever height. I think the specs call for the air to just start hissing when a straight-edge is laid across the open can and lever tip. That's pretty much how I set them. There should be a little free-play in the lever with air pressure on... but you probably know all that. If it makes you feel any better I have had a similar problem with an older model MR12.
Any time I am underwater
Now that you mention it, I only get a catastrophic gas loss event forcing me to abort my dive following an ESA on days with spectacular visibility, zero current, a bazillion large lobster walking around and warm So. Cal. water. Oh yea, and only when I inhale.... Seriously, I have no clue what the problem is, but I have yet to tear down the 1085 2nd stage.Does this happen at any specific depth or draw volume ?
Grasping at kelp here, but Paul's comment made me think of the somewhat remote chance that there is something abnormal about the shape, size or positioning of the venturi passage in your second stage. I know it's not likely, but you should closely compare the internals of the problem 2nd stage with another one of same make if you have one.h2operations wrote: ↑Sat Mar 07, 2020 2:22 pmI know that was a strange question and your answer even better. I am curious if it is a 3 part combo. Many moons ago when the waters were clear and the skies were blue, I saw this on another device. The lever/spring and diaphram got into a position at depth that they could not bounce back into position due to the flow pressure. The flow caused basically a suction as it went past the diaphram. This goes back to Bill questioning if it has a original parts?
Thanks Ron,Ron wrote: ↑Thu Mar 12, 2020 5:19 pmThis is anecdotal, but I've seen stacked tolerances for the length of the poppet and the shallowness of the lever do this. It only happens when the lever is very far down during a deep inhalation. Here is a bad picture indicating what I am describing. I've seen this twice with a long poppet and a short lever....
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