Low FPS?

[Jman]

My spring was bent also. Don't think Anythings wrong, but that's just me

[nateious]

Yeah I'm thinking the real issue is that seal.  I might as well do an entire tune up while I've got the gun apart, I've got to pick up a deburring tool after work.

[Jay]

Yes that is your seal(yellow part) and yes it's shot with that big nick in it, to remove I can alot of time do it with fingers after warming it(but I do have strong hands), you can use a flat tip screw driver(thin face) and carefully pry it up an off the "button"(don't mar anything), for the other 0-rings might as well replace then while you have the gun apart, alot of place's to get them?

[nateious]

Yes that is your seal(yellow part) and yes it's shot with that big nick in it, to remove I can alot of time do it with fingers after warming it(but I do have strong hands), you can use a flat tip screw driver(thin face) and carefully pry it up an off the "button"(don't mar anything), for the other 0-rings might as well replace then while you havdfse the gun apart, alot of place's to get them?

I believe I found the proper o-ring in the GTA Library on the Gamo CFX Rotary Breech Seals write up, I ordered a pack of them. All that's left is to order a new seal and decide if I want to replace the spring at the same time.  On that note I know you're supposed to put tar on the spring (mine was coated, I got it all over me lol) what exactly is moly, is that like graphite powder? Where does it go?

[Jay]

LOL it is messy isn't it, if you go with a new spring try JMs his might not make the gun faster but sure seem of a high quality an last well, he also will have the tar you need ,just a very light coating will do on the spring.

[Bullit]

Yikes!  That seal is shot.
Order the E3650 Gamo Tune Kit from JM.  It has the seals and spring and Lubes.  I personally would take the oportunity to clean up the breech, chamber,  and replace the small orings as well.  Keep everyone posted on your progress.  Have Fun !

[be4meliz]

The seal is definately junk-when you go to relace you can heat it up slightly with heat gun or low oven to make more pliable- to get off, same thing and use dull dental pick or small screwdriver at the edge where it meets piston- there's a small lip that you have to get it up and over- just reverse process to install- a small bit of moly grease on the backside of seal-(no petroleum products) and be gentle putting back in compression tube- might want to replace spring also as it looks coil bound-possibly from leaving cocked too long

[Nathan]

I second the E3650 kit from JM. Don't put that bent/kinked up factory spring back in. It would work in a pinch I guess, but you got the gun apart. Go ahead and replace that bent up spring with a better than factory spring from JM. You'll be glad you did

Nathan

[s10gto]

JM makes great springs. Well worth every penny. You could gas ram it also.
 Dustin

[nateious]

Right now I'm trying to get in touch with David from Airgunwerks to get a gas ram, if I don't hear back from my email by tomorrow, I'll try calling the number on the site.  I already got my moly and the JM apex / tesla seal combo, it came in Saturday.  I had an issue with the o-rings, I ordered some but they turned out to be slightly too small (accidentally looked at the new CFX seal guide, I have a slightly older one whoops ) , I'm getting a pair of digital calipers and will measure mine so I can order the correct one.  If for some reason I can't get a gas ram I'll just have to wait for the E3650 springs to get back in stock. JM's page says mid July so that shouldn't be too far off.  Thanks for all the help everyone, I'll post updates when I get the gun rebuilt!