Pro/carbine sputtering

[Sdawg]

Oh man, I have never had this problem, but this pro/carbine I bought for nostalgia won’t recock and started sputtering. I’ve changed all the orings including inside the CVX valve, which I *think* I put back together correctly? The hammer is shiny where it catches, so maybe it is slipping off the sear?, Or could the drive spring be too weak?

I am using HPA ninja reg with 700psi output from a full tank.

[Chuck E Ducky]

Have you tried higher pressure like 800 ish? Or was it working at 700 and now it’s not.

I run about 800 to mine.

[BrickHaus]

You need at least 800psi or a large gas through to give you more volume at the valve would be my guess.

[Sdawg]

Strangely, with this ninja reg, it only puts out 700psi with both red shims.

It is working now, not sure what I did other than rebuild the entire marker. Maybe I had the valve incorrect from a previous rebuild?

[Jackson]

I've had the same issues with a Ninja reg. I bought a rebuild kit and added a third red shim to boost the output. I had recocking/velocity issues on my blowbacks (Pro/Carbine and Thundercat) before adding the shim.

[Chuck E Ducky]

Is it a ninja ball valve reg? They can choke if you tighten them all the way. You can drop a large oring in the ASA or just put it on give it a 1/4 turn out.

[Sdawg]

Is it a ninja ball valve reg? They can choke if you tighten them all the way. You can drop a large oring in the ASA or just put it on give it a 1/4 turn out.

No, I don't have the ball valve reg.

I think that the issue is the striker spring being a tad weak. I have a set of new ones on the way. pro/carbine parts and upgrades have really dried up after 30 years … 🥺

[Chuck E Ducky]

Yeah I had to scavenge parts for mine. It’s pretty tricked out now thanks to some generous friends.