Edgun R3M .25. Need Advice

[Strietwise]

Just noticed that my Edgun when full of air shoots JSB 23 gr at 680 FPS. Than as I shoot it speeds up to around 920 FPS at 130 bar. Any idea what I need to do?

 

[stormy]

Yes, your reg is not working correctly.

 

[Yo]

Start at a lower fill pressure. Yo!

 

[Yo]

Check your hammer spring first. Yo!

 

[Yo]

Yes, your reg is not working correctly.

This is also a viable observation. Yo!

 

[Strietwise]

Ok. I will lower the pressure and give it a try. Not sure what I am looking for when checking the hammer spring but will check it out.

 

[Centercut]

It’s probably the reg creeping up in pressure. If you let it sit for a while, or r overnight, does it shoot slow the first couple of shots and then go to normal? If so there is a very good chance that is the issue. To fix that you can resurface the seat of the regulator (and replace all the orings while you’re in there) or buy a new reg like a Huma and install it. I think Ernest has some videos on the Edguns as far as disassembly and reassembly. The east way to go is to buy the Huma, and set it up approx 125 to 130 bar, and you’ll be good to go. Shouldn’t take more than an hour even if you’ve never done it before. If you don’t have the special tool to degas the gun you can just slowly unscrew the pressure gage and bleed off pressure that way. Let us know how it goes?
Mike

 

[EDgunWest]

sure you can spend several hundred on Huma or 10 cents for 2 o-rings your choice Do not unscrew the pressure gauge to degas the gun, this is dangerous, it is not how Ed designed the gun to be degassed. I have tools to degas the gun or you can press the valve with a large screwdriver on the shaft of the driver.

the regulator is slightly different but the process is the same, 5 1.5 and 8 X1.5 for the piston 

https://www.youtube.com/watch?v=VN4vwZLpIEY

 

[zx10wall]

Changing o-rings won’t repair a bad piston seat causing creep. That would need to be resurfaced. A Huma is an easy choice.