Oceanic Omega II - Help with Tuning

[realdiver7]

I do a lot of my own regulator servicing, but I have yet to figure out how to tune an Oceanic Omega II second stage to make it breathe a little easier. I can disassemble it, replace parts, and reassemble it, but I just need to know what to turn or adjust to make the initial inhalation effort easier. There is a small screw on the inside, in the middle of the inner working parts, but it seems to be in a fixed position.

Please skip the part about how I should take it to an authorized service technician.

Any ideas?

Thanks!

 

[oxyhacker]

The Omega2 has only one adjustment, the screw underneath the exhaust cover that acts like the lever height adjustment on a one-adjustment basic downstream 2nd.

Oceanic makes a special tool for adjusting it which is just an exhaust cover with a hole drilled in the middle of the purge button for access to the screw. You can adjust it without the tool by removing the cover, making an adjustment, then putting the cover back on to test it. It may also be possible to remove the purge button temporarily to get access, but I can't remember off hand if that creates other complications or not.

The official way to tune it is to turn the screw in (clockwise) until the valve is leaking just a little bit. Then turn it out 1/8 a turn a time until the leakage stops. Purge or breathe sharply on the reg several times after each adjustment, so everything can settle into its normal position. Once the leaking stops turn the screw out 1/4 turn (1/2 turn for if it is being used as an octopus, though why anyone would use an O2 for an oct is beyond me!).

The Omega is a very fussy reg to get right, since the servo valve makes it easy to freeflow, and many techs who tune them have their own "secret" method, and you will usually end up doing it pretty much by trial and error until you find what works for you.

I do a lot of my own regulator servicing, but I have yet to figure out how to tune an Oceanic Omega II second stage to make it breathe a little easier. I can disassemble it, replace parts, and reassemble it, but I just need to know what to turn or adjust to make the initial inhalation effort easier. There is a small screw on the inside, in the middle of the inner working parts, but it seems to be in a fixed position.

Please skip the part about how I should take it to an authorized service technician.

Any ideas?

Thanks!

 

[Thalassamania]

I drilled a little hole in the cover so that I can assemble it and still adjust it.

 

[realdiver7]

I appreciate the replies and I found the small black plastic screw you mentioned for adjustment. It is so small, I almost overlooked it. The procedure sounds a lot like the same steps I have used to tune other regs, especially with the 1/8 turn, etc.

By the way...divers use the Omega II for an octo because there is no up or down. An OOA diver can grab it, place it in the mouth, and not worry about up or down orientation. It is also small and streamlined, so it is an octo that is easily stored out of the way.

Thanks a lot!