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Old 11-20-2010, 06:26 PM #1
1337 Walrus
 
 
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Geo+ drop off/velocity discrepancies?

Alright, so I just got a used Geo with the GST and GR2 installed.

I took it out to the field, aired it up, and t was reading 280fps +/- 5. However, every now and again (every 5-10 balls) a shot would come out at like 150fps.

I know that spoolies have some first shot drop off, but this was really ridiculous.

Occasionally, it would come out at such a low velocity that it didn't even leave the barrel. Due to the fact that it didn't leave the barrel, the next shot would break it and then I'd have 2 popped balls in the barrel to try and shoot through.

It was a little chilly today, around 40 fahrenheit, and the field I was at was only filling to 2500. (if that helps)

Also, when I degas it, it fires a shot.

Any ideas what could be causing this?

Last edited by 1337 Walrus : 11-20-2010 at 06:49 PM.
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Old 11-20-2010, 07:24 PM #2
dane/dawg
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..does it have a fresh battery and a dwell of 14-14.5..
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Old 11-20-2010, 07:39 PM #3
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Brand new battery, and I'll check the dwell right now.
Also, I'm trying to remove the can right now just to re-lube it, and i CANNOT get it out with my finger. How should I remove it?

Dwell was at 12.5.
Just up'd it to 14.5.
Hopefully solved the problem?

Last edited by Uziel Gal : 11-21-2010 at 12:50 PM. Reason: Double post.
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Old 11-20-2010, 10:23 PM #4
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as for the fps drop off try these

Air system/regulator does not flow fast enough
to keep up.
Sticky o-rings in Bolt Assembly.
Blocked Filter in Solenoid Assembly.
Incorrectly assembled Back-check Assembly

Degas the marker and remove the tank to be safe

First try and stick your finger in from the back and pull it out, if you can't get it out still you can push it out from front to back.
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Old 11-20-2010, 10:51 PM #5
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Thanks guys.
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Old 11-21-2010, 07:05 AM #6
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Mate try backing the on/off asa knob off half a turn once full screwed in when gassing up. Some bottle regs get blocked by the pin inside when asa is screwed all.
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Old 11-21-2010, 03:34 PM #7
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As for your shooting when degassing problem, it is described here:

http://www.pbnation.com/showthread.php?t=2893912

I also have this problem since the previous owner of my geo lost this little check valve when he part swapped with someone. Hope you are still up for the part swap, and guess neither of us have to worry about losing the pcv since it seems to already be done for us.
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Old 11-29-2010, 06:00 PM #8
Michael_Weston
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Quote:
Originally Posted by sections View Post
Mate try backing the on/off asa knob off half a turn once full screwed in when gassing up. Some bottle regs get blocked by the pin inside when asa is screwed all.
i was having same problems here and i stop turning the asa as soon as it airs up and upped the dwell...never had a problem since
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