MK25 Mainspring Backwards Compatibility

[Random Dude]

Hi all,

Looking to change out a defective spring on my MK25 (AF version as in pic), wondering if it's possible for me to change the MK25 EVO spring that has a thicker, blue coating instead?

Would prefer to have the increased cold and corrosion resistance provided by the new EVO springs if possible.

Appreciate if anyone could advise as to the backwards compatibility of the mainspring, thanks a lot!

 

[Pavao]

What is defective on it?

 

[Random Dude]

@Pavao Asking on behalf of a friend who got the reg second hand.
Mainspring is slightly bent, not straight, and also does not hold stable IP (only 6 months after service with minimal use before creeping very high). Any idea on the backwards compatibility of the spring from the EVO version? Won't mind a slight upgrade since gonna change the mainspring anyway.

 

[Pavao]

That’s a piston issue (given it’s a new seat), not a spring issue.
Unless you find a source of spring with very old inventory and they still have non blue spring (which isn’t a problem at all) then all the springs Scubapro sells now are the blue ones.

 

[Rusty Shackleford]

I think he is asking if the current blue ones will work in an older reg. I suspect it should.

 

[Random Dude]

Yes, I am wondering if the current blue ones will work in the non-EVO versions.

As for the spring, they are cheap from my LDS, and might as well as change them to be sure since they are bent (no longer level on both sides), and also has the coating flaking off. Piston has no defects as far as can be detected.

Therefore, asking if any has any experience "upgrading" to the EVO springs.

Thanks all!

 

[Pavao]

does not hold stable IP (only 6 months after service with minimal use before creeping very high)

[QUOTE="Melvin Moi Kai Sen, post: 8509647, member: 487966"]Piston has no defects as far as can be detected.[/QUOTE]
Whoever is evaluating your regulator has no idea what they’re doing, you should seek a qualified technician and let them service your reg

[QUOTE="Melvin Moi Kai Sen, post: 8509647, member: 487966"]
Therefore, asking if any has any experience "upgrading" to the EVO springs.

Thanks all![/QUOTE]
I’ve answered it above, Scubapro ONLY supplies one kind of spring now, the blue one, therefore, any MK20/MK25 that needs a new spring will get the blue one, you’re not “upgrading” anything, it won’t be any more cold water tolerant, it won’t be a semi-EVO MK25, you’re just swapping a worned out part for a new one, but based on what info you have provided so far I’d suspect there isn’t anything wrong with the spring anyway