I've got a PMI Piranha G2 that won't recock. I've replaced all bad o-rings & made sure there are no leaks. All the CO2 canisters that I've used work just fine on other markers. When I cock the Piranha, it looks just fine & doesn't leak, but then when I pull the trigger, it "machine guns" like the canister is out of CO2, even though it's full. I've tried everything I can think of, but can't get it to work. What do I need to do? Replace springs or...? I don't have the $ to just buy a new marker, but I'd like to get this one going again, since the other option in our house is an old stingray.
Thanks for your help!
Edit:
For all I can tell, the gun is all stock (it looks exactly like the stock pics online).
Lube it and maybe theres dirt and sand inside it because thats what happened to me and they took air and blew everything out of the marker
I took the marker completely apart, cleaned it, let it dry, & lubed it with marker oil before I replaced the o-rings. No leaks, but it's the same problem with machine gun chop.
The local guy at our rather podunk shop suggested it might be something to do with the valve (#6 on the schematic) or the valve cup seal (#7 on the schematic). Any ideas? I'm also wondering if the hammer spring (#15) or the valve spring (#10) are bad.
One, and this is very common on older blowbacks, is that the sear of the marker is worn and no longer catching the hammer due to that wear. You'll need to replace the sear if it's not in perfect shape or somewhere close to perfect, i.e. clean cut and sharp.
Another is that the striker oring being wrong. If you replaced it, could too thin and doesn't really touch the walls of the lower tube, for example. Using a tank oring for the striker would be one such example. If you didn't replace it, do it.
The last is that the spring tension of the main spring is too high, either due to it being mis-shaped, or because the velocity screw is set too far in. So either back the screw out or change the springs altogether.
Thank you, 2.0! Lots of great info there. I'll check out the sear to see if it's worn. I couldn't find the striker oring on the picture (sorry for my lack of knowledge). Were you talking about the hammer oring (#35) or something different? Could you tell me which # on the pic you were talking about?
I'm fairly certain that we have the correct oring for the hammer/striker. here are some pics of the sear. The back corner looks a bit rounded, so I think that's the culprit. Thanks for your help.
Perfect! I had found it a little cheaper @ directpaintball.com, but since action village is offering free shipping, that's definitely the better deal. According to one of the reviews, the original sears are aluminum, so laser-cut steel should be a real upgrade.
Still having problems. I know it's been a while, but school started up again as well as home projects. I'm ordering a full kit (springs, valve, o-rings) to see if anything I had in there originally was wrong.
Do you an X-tube on your marker? I found that if I shoot CO2 with the x-tube there isn't enough air to recock.
Another problem I ran into was on my Zeus pistol based on Spyder's blowback. I don't know if your G2 has the same type trigger as my Zeus, but if you take your trigger frame off the gun then push on the sear and pull the trigger you can see if the trigger is resetting the sear. On my trigger itself it has a little spring and metal clip the spring was bent in the trigger and was not reengaging the metal clip so the sear would reset
Sorry not x-tube but x-chamber
Last edited by heliboy1100 : October 21st at 10:59 PM.
Reason: wrong term
The gun seems to be completely stock when I compare it to the exploded view above, so I don't think there's an expansion chamber. I have pushed with the trigger some, and it seems to engage the sear. The spring pulls it back away from the trigger just fine, and the trigger engages it okay when I push the sear forward.
I think there's a problem with a spring somewhere, either my hammer spring (#15) or my valve spring (#10). The kit I ordered has one of each of those springs (both high and low velocity main springs and a valve spring) in it, so I'll try those as well as all new orings and see if that does the trick. If it doesn't, I'm stumped. Maybe my valve is bad? I'm not sure how it could be. It looks like all the contact surfaces with the valve cup assy are smooth.
Last edited by lhamilton1807 : October 24th at 06:56 AM.
I feel I've tried everything. I replaced the hammer o-ring & the front bolt o-ring. All other o-rings look good. There are no leaks when the co2 is attached. I've bypassed the bottomline and went right to the vertical position. I've lubed it. I've replaced the valve cup assy and the valve spring as well as trying both a low velocity and high velocity main spring. I've tried moving the velocity screw in and out with both springs.
heliboy1100, you mentioned the expansion chamber. Is #3 (the custom ASA with chamber) an expansion chamber? It's filled with some sort of copper sponge or something.
Anybody have any other ideas? I'm trying not to sink too much into the gun; I've already put $70 into a used marker (buying it used + parts) and i've only gotten TWO uses out of it.
Paintball Solutions (Piranha's outsourced tech support) told me that it's probably the hammer. I took out my hammer & took pictures (below) and there doesn't seem to be any major wear on the hammer edges. Do I actually need to replace this thing? The only concer I can see, I guess, is that the back edge (the one the sear catches on the side opposite the blue o-ring) doesn't stand out from the body of the hammer as much as the front edge (see first pic). Is it supposed to look like that, or is it REALLY worn?
Last edited by lhamilton1807 : October 29th at 11:55 PM.
Reason: pointed out certain pic
Piranha G2 won't recock
Piranha G2 won't recock
Solved!
