Airsoft Canada
https://www.replicaairguns.ca/airsoft

Go Back   Airsoft Canada > Discussion > Doctor's Corner
Home Forums Register Gallery FAQ Calendar
Retailers Community News/Info International Retailers IRC Today's Posts

CYMA MP5-J won't fire shots! Help!

:

Doctor's Corner

Reply
 
Thread Tools
Old July 2nd, 2009, 15:17   #1
Eskimo225
 
Join Date: Jul 2009
Exclamation CYMA MP5-J won't fire shots! Help!

Hi!

I just bought a CYMA MP5-J, but it won't fire any shots!
I can hear the engine working, but it still won't shoot... :banghead:
Maybe you guys have any tips on something I might have done wrong or something I should do!

Thanks, I really need help!
Eskimo225 is offline   Reply With Quote
Old July 2nd, 2009, 15:19   #2
Wilo
 
Wilo's Avatar
 
Join Date: Sep 2008
Location: Renfrew, Ontario
Send a message via MSN to Wilo
Stupid question and all - is your mag loaded? What kind of mag is it(hi-cap,lo-cap,etc), are they feeding properly, etc.

If you fire with a loaded mag, remove the mag, and bb's fall out of the magwell, they arent feeding.

Read an instruction booklet
Wilo is offline   Reply With Quote
Old July 2nd, 2009, 15:39   #3
Huron
GabeGuitarded
 
Huron's Avatar
 
Join Date: Aug 2008
Location: Toronto, ON
Quote:
Originally Posted by Wilo View Post
If you fire with a loaded mag, remove the mag, and bb's fall out of the magwell, they arent feeding.
Not true. Several bb's WILL fall out of the magwell when you remove a mag, unless you fired every last shot.

Do you mean that the motor is going but the piston isn't smacking? That could be one of a whole lot of other problems.

It could be a problem with the tappet plate/loading nozzle. Do you know how to get to your mechbox? If not, try shining a light into the magwell and fire and look to see if the nozzle is pulling back before each shot.
__________________
Quote:
The war between the sexes is over. We won the second women started doing pole dancing for exercise.

Last edited by Huron; July 2nd, 2009 at 15:42..
Huron is offline   Reply With Quote
Old July 2nd, 2009, 15:52   #4
Eskimo225
 
Join Date: Jul 2009
Do you mean that the motor is going but the piston isn't smacking? That could be one of a whole lot of other problems.

It could be a problem with the tappet plate/loading nozzle. Do you know how to get to your mechbox? If not, try shining a light into the magwell and fire and look to see if the nozzle is pulling back before each shot.[/QUOTE]

Several BB's fall out when I remove the mag and it looks like one BB is stuck inside the barrel right were the bullets are being feeded in. I tried to get it out, but had no luck. :banghead:

The motor IS going, but the piston is NOT smacking. (!!!!!) I'm very frustrated... Thanks for reply!
Eskimo225 is offline   Reply With Quote
Old July 2nd, 2009, 15:59   #5
Huron
GabeGuitarded
 
Huron's Avatar
 
Join Date: Aug 2008
Location: Toronto, ON
Ah then I'd recommend contacting one of the gun docs listed Here. Your problem is a bit out of my league, I'm afraid .
__________________
Quote:
The war between the sexes is over. We won the second women started doing pole dancing for exercise.
Huron is offline   Reply With Quote
Old July 2nd, 2009, 16:04   #6
AngelusNex
formerly Sepulcrum
 
AngelusNex's Avatar
 
Join Date: May 2007
Location: Kingston,ON, aka Funkasia
Send a message via MSN to AngelusNex
motor height off, bad shimming, dead battery, broken gears, dud motor. Many possible problems. charge the battery and if it still doesn't work go to a gun doc.
AngelusNex is offline   Reply With Quote
Old July 2nd, 2009, 19:18   #7
kalnaren
 
kalnaren's Avatar
 
Join Date: Dec 2006
Location: Midland, Ontario
If the motor is working but you don't hear the piston it's either a stripped piston or broken gears.
__________________

Quote:
"Someone in a Prius tried to race me at a stop sign the other day. I couldn't believe it. I had him for the first 100 feet or so but I can only walk so fast."
kalnaren is offline   Reply With Quote
Old July 3rd, 2009, 18:17   #8
sushicake
 
sushicake's Avatar
 
Join Date: Dec 2008
Location: Markham, ON
Or it could be a broken tappet plate jamming the gears.
__________________
"Don't you know the first law of physics? Anything fun costs atleast $8"
sushicake is offline   Reply With Quote
Old July 3rd, 2009, 18:23   #9
Muffin
 
Muffin's Avatar
 
Join Date: Sep 2007
Location: Manitoba
When you pull the trigger with a full battery, what do you hear exactly? Is it grinding? Does it sound muffled? Do you hear the piston cycling(hear the shots)?
Answer these and we can help you further.
Muffin is offline   Reply With Quote
Old July 7th, 2009, 08:07   #10
Eskimo225
 
Join Date: Jul 2009
Quote:
Originally Posted by Muffin View Post
When you pull the trigger with a full battery, what do you hear exactly? Is it grinding? Does it sound muffled? Do you hear the piston cycling(hear the shots)?
Answer these and we can help you further.
Well I guess it's like a grinding sound, but it dousn't sound muffled. It just sounds like the motor is going, but I can't hear shots.
Eskimo225 is offline   Reply With Quote
Old July 7th, 2009, 09:43   #11
Muffin
 
Muffin's Avatar
 
Join Date: Sep 2007
Location: Manitoba
Your motor height needs to be adjusted. Have you ever taken out the motor or removed the motor plate? If you have make sure there is nothing missing.
On the motor plate you'll notice a an allen screw in the center. Get yourself the allen key and tighten it a half turn, put your gun in semi-auto and pull the trigger. If its grinding, give it another half turn and repeat the process until it sounds right to you. If it starts to click and not cycle, then your motor is too high. If this happens then reverse a quarter turn and test again until it sounds right.
Muffin is offline   Reply With Quote
Old July 7th, 2009, 11:00   #12
ybrik
 
ybrik's Avatar
 
Join Date: Jun 2007
Location: Ontario, Canada
During a fully charged batt if it behaves the same, remove motor in the grip and re install. If same thing happens, it "might" be motor height. You could adjust the motor plate. If not, your best bet is opening the mechbox. It could be the a jammed ARL, and most importantly shimming.
__________________

5.56x45mm + m27 = M249(SAW)
ybrik is offline   Reply With Quote
ReplyTop


Go Back   Airsoft Canada > Discussion > Doctor's Corner

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Airsoft Canada
https://www.replicaairguns.ca/airsoft

All times are GMT -4. The time now is 20:04.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.