Major echo 1 p90 issues

[stale kracker]

 Hey guys I'm having a hell of a time figuring out what is wrong with my p90. I bought this thing brand new used it in 1 game then my friend gave me an m4 and I put the p90 on the shelf for a year and a half. Now I go to sell my p90 (which had no problems prior to putting in on the shelf) and test fire it and the gun shoots no more then 10 ft. before hitting the ground. I have no idea why this is happening. I was looking at the bucking and it's pretty hammered but I wasn't sure if that could be it, also I noticed that when the hop-up connects to the air nozzle it doesn't connect smoothly and occasionally needs to be forced on (but i don't force it on). I had an M4 inner barrel in it then put the stock p90 barrel in it and nothing changed. I'm just stuck. I want to get the gun in a decent condition to sell but I'm thinking that it is nearly impossible thanks for any help.

[Fung Li]

Maybe you left the spring compressed?

[Major payne]

Maybe you left the spring compressed?

Thats definitely possible, when you shoot it does it cycle smoothly? Have you opened the gearbox to see if is any damage to the sector gear, or piston? Your O-ring on your Piston head might be dry and bad, which would cause a major loss in compression. With it sitting for a year and half, and if you left the gearbox compressed it could have done some damage to your tappet plate, which would be causing the misalignment of the air nozzle and the hop-up system.

[spazz]

Maybe you left the spring compressed?

this might be an issue, but probly not the problem all by it self. i have left springs compressed for long periods at a time and they lost very lil.

Maybe you left the spring compressed?

Thats definitely possible, when you shoot it does it cycle smoothly? Have you opened the gearbox to see if is any damage to the sector gear, or piston? Your O-ring on your Piston head might be dry and bad, which would cause a major loss in compression. With it sitting for a year and half, and if you left the gearbox compressed it could have done some damage to your tappet plate, which would be causing the misalignment of the air nozzle and the hop-up system.

how much was this gun used? dry grease will deffinatly lead to a lack of compression. and then you will have fps/range issues. it will also cause your rof to go down and cause extra wear on all internal parts. you said the bucking is kinda trashed?
so here is what i think you should do:
replace the bucking
have the gb regreased and the piston head o-ring replaced with a #14 unit.
if you can manage the gb work on your own then have at it mabey even reshim and correct the aoe while you have it open anyways. if not then find a reliable tech and have them take care of it for you. as long as nothing is broke, what you need done should be relitivly cheap

[stale kracker]

I used this gun very little, took it to one game and my friend came with. He gave me an m4 of his for some money, then I put the p90 in my gun bag and took it home. I probably only put 600-1000 bbs through it. The o-ring makes sense and it looks like I'm going to have to do some rooting in the gearbox. My only problem with that is I hate the plastic echo p90 body. The way the gearbox is bolted in is nearly broken so I might have a tech work on it so I don't screw things up more then they are. Do you know of a reliable tech that could help me out? Thanks for the help everyone!

[spazz]

there are several techs in the valley that know what they are doing and could help you get this gun up to par.
east valley, mesa,gilbert and such:
warlord, green listerine, nuke duster, dust to dust
slinkey is in the metro center area
and im located in the west valley and there are a couple of other techs on here that i have probly missed. if they want to take on this project they will speak up.
i will tell you this though. there is probly only one person in az with as much experience working on the p90 platform as me.

[stale kracker]

I decided to save myself some money and took the gun apart. When I did this I found this!

I'm not sure if the image was posted as I'm writing this but if it didn't i found a bb inside the gearbox in the shell on the bottom right corner by the air nozzle. Do you guys think this could be the issue?

[Green Listerine]

It was probably preventing the tappet plate from fully cycling forward, resulting in a huge air leak between the nozzle and hop up chamber.

[Major payne]

A BB in the gearbox!!!! hahahah thats awesome! Yeah sounds like Green hammered it, makes sense to me

[spazz]

if it was in front of the tappet, then it would indeed cause a masive air leak. i while you have it open i would go ahead and do a re-grease at the very least and since you said the bucking was beat up replace it to.
i love it when the actual problem is so far of the norm nobody guesses it.

[stale kracker]

I will re-grease the parts and replace the bucking but I am just shocked that out of all the things possible it was a bb. I dont understand how it could even get in there, this was the first time I have disassembled this gun. Just doesn't make sense lol.

[stale kracker]

What kind of grease should I use? Would lithium be okay? Also I was looking at buckings and wasn't sure what the degrees meant.

[Warlord]

Really any grease that lubricates and lasts is good as long as it handles plastics and rubbers nicely. White lithium grease is good, but depending on the brand it tends to harden/disappear....leaves a white residue.

[Major payne]

The degrees for hop-up buckings are the hardness of the bucking. In lower FPS settings a lower degree (which is a softer bucking) should be used, while in high FPS settings a higher degree bucking should be used. This is because the harder bucking can handle the added stress and not tear. For a stock P90 your going to want a softer bucking

[stale kracker]

I replaced the o-ring, re-greased the internals, corrected the AOE, and replaced the bucking. This thing shoots beautiful. Thanks for all of your help guys!