Mk2 Plus???

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ddown

Contributor
Messages
420
Reaction score
10
Location
Morrice, MI
# of dives
500 - 999
Just installed new kit pressurized @ 148 after 100 cycles down to spec 140 should it be good or does more cycling help I've heard that it can take 500 to stable holds steady 140 for over an hour . think I'm good?
 
ibid....
 
....after 100 cycles down to spec 140

What was the supply pressure before and after the 100 cycles?
Is the IP steady? That is the most important spec.
 
The other thing that comes to mind, is what is is feeding? If it is a balanced second, you shouldn't really have much to consider. If it is going to an unbalanced second, changes in IP may cause a need for re-tuning of the second stage, but that is dependent on how "on the edge" you may have the second stage tuned.
 
3000 start 2400 ending only had one tank has been locked @138-140 for 3 hours seat should have taken a set now. Got it for 20.00 when I took it apart seat had fallen out of shaft just replaced with a new one and all new orings ScubaPro kit. how would a seat fall out bad overhaul? new one was a nice fit.
 
What was the supply pressure before and after the 100 cycles?
Is the IP steady? That is the most important spec.
Just installed new kit pressurized @ 148 after 100 cycles down to spec 140
 
Got it for 20.00
Sounds like an excellent deal to me.

...seat had fallen out of shaft just replaced with a new one and all new orings ScubaPro kit. how would a seat fall out bad overhaul?
Yes, probably a bad overhaul or wrong seat.

3000 start 2400 ending
Here is my concern. As the MK2 is an unbalanced piston first stage, the IP naturally drops in concert with the tank pressure (supply pressure.) Therefore it is quite possible you are still slightly over spec at max tank pressure-you won't know until you hook it up to a full tank. However, it is not WAY over and will not harm anything. It's just that when one rebuilds a reg it should be set to within specs.

Were there any spring shims in the body? If so, one or more can be removed to lower the IP.
 
It had 2 I'll take one out and recheck thanks..
 
right in spec @ 3000 now thank COUV
 

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