Gearbox 2 Shooting full auto without any pull of trigger on Semi

Xepharo · January 26th, 2007, 00:50

Problem: Gearbox 2 Shooting full auto without any pull of trigger on Semi.

So yes... My M16A4 project is almost done. However, I ran into this minor problem.
I switched my gun's selector from Safe to Semi, and it started shooting in full auto. MY FINGER WAS NO WHERE NEAR THE TRIGGER. IT WASN'T PULLED EITHER.

Gearbox specs:
-Gearbox type 2
-Hurricane pro gear box
-6mm bushings by guarder / systema shims
-stock marui gears
-guarder SP110 spring
-systema spring guide
-ICS 12 gauge wires.
-Guarder piston/piston head
-Guarder cylinder/cylinder head
-guarder tappet plate/nozzle

That's about it... now here's the interesting thing. I have recently switched from Stock Marui Gearbox 2 to the Hurricane Pro gear box, because many of the screws stripped including the pistol grip ones. However, it never had this kind of problem, so I'm guessing maybe it's the selector plate? I have a G&P one lying around, didn't replace it yet, because my marui selector plate seems fine.

I upgraded the gearbox myself the first time with the stock marui box, and everything was fine. When this problem occurred, I tried to puzzle out any sort of problems myself, but couldn't find one, because everything seems to be fine where they are.

Some advices from Brakoo and Pyro were to put tape near the selector plate, so it will space it properly, but I was wondering if anyone has any other solutions or responses.
THANKS!! bedtime...

Trader rating · January 26th, 2007, 01:48

that happened to my G36 the spring for the trigger switch most likely broke

bruce · January 26th, 2007, 02:14

Or he forgot to connect it back. Without the spring, you may have pulled the trigger without the batteries in the gun which positions the sliding contact into the 2 tabs. Being a careful guy, you switch the selector to safe before you connected your battery. When the battery is connected and the selector move to semi, the circuit gets close and power goes to the motor. Moving the selector back to safe breaks the circuit again.

Xepharo · January 26th, 2007, 13:53

The trigger spring did not break.
I'm going to test it again today. I did notice that the trigger spring came off, and the spring that attaches from the gearbox to the contact came off also when I opened the gearbox.

Xepharo · January 26th, 2007, 15:34

Does anyone have a Guarder 1st generation metal body with a pro gear box? I'm having some problems fitting it...
The body pin in the back of the receiver and the thinner pin near the selector don't go in. It seems like I have to move the gearbox a bit upwards and forwards. I might need some filling.

Skruface · January 26th, 2007, 16:59

PM MadMax. You may need to "tunk" the gearbox....

Xepharo · January 26th, 2007, 17:06

yeah.. seems like I might need to do that... grrr However, I've done enough filing on this guarder metal body, I don't want to hurt it anymore, especially not my gearbox.
I'm just going to buy a Hurricane metal body, and see if that will fit better. I never had any problems with Hurricane metal bodies fitting with different gearboxes somehow.

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January 26th, 2007, 00:50	#1
Xepharo Trader rating Join Date: Apr 2004 Location: Vancouver, Canada	Gearbox 2 Shooting full auto without any pull of trigger on Semi Problem: Gearbox 2 Shooting full auto without any pull of trigger on Semi. So yes... My M16A4 project is almost done. However, I ran into this minor problem. I switched my gun's selector from Safe to Semi, and it started shooting in full auto. MY FINGER WAS NO WHERE NEAR THE TRIGGER. IT WASN'T PULLED EITHER. Gearbox specs: -Gearbox type 2 -Hurricane pro gear box -6mm bushings by guarder / systema shims -stock marui gears -guarder SP110 spring -systema spring guide -ICS 12 gauge wires. -Guarder piston/piston head -Guarder cylinder/cylinder head -guarder tappet plate/nozzle That's about it... now here's the interesting thing. I have recently switched from Stock Marui Gearbox 2 to the Hurricane Pro gear box, because many of the screws stripped including the pistol grip ones. However, it never had this kind of problem, so I'm guessing maybe it's the selector plate? I have a G&P one lying around, didn't replace it yet, because my marui selector plate seems fine. I upgraded the gearbox myself the first time with the stock marui box, and everything was fine. When this problem occurred, I tried to puzzle out any sort of problems myself, but couldn't find one, because everything seems to be fine where they are. Some advices from Brakoo and Pyro were to put tape near the selector plate, so it will space it properly, but I was wondering if anyone has any other solutions or responses. THANKS!! bedtime... Last edited by Xepharo; January 26th, 2007 at 00:53..

January 26th, 2007, 02:14	#3
bruce Super Moderator Trader rating Join Date: Aug 2003 Location: Montreal	Or he forgot to connect it back. Without the spring, you may have pulled the trigger without the batteries in the gun which positions the sliding contact into the 2 tabs. Being a careful guy, you switch the selector to safe before you connected your battery. When the battery is connected and the selector move to semi, the circuit gets close and power goes to the motor. Moving the selector back to safe breaks the circuit again. __________________ bruce: Team Bad Karma-(BK-05) : Special Battalion East-(SBE-01)

January 26th, 2007, 01:48	#2
bobthemonky Guest Trader rating	that happened to my G36 the spring for the trigger switch most likely broke

January 26th, 2007, 13:53	#4
Xepharo Trader rating Join Date: Apr 2004 Location: Vancouver, Canada	The trigger spring did not break. I'm going to test it again today. I did notice that the trigger spring came off, and the spring that attaches from the gearbox to the contact came off also when I opened the gearbox.

January 26th, 2007, 15:34	#5
Xepharo Trader rating Join Date: Apr 2004 Location: Vancouver, Canada	Does anyone have a Guarder 1st generation metal body with a pro gear box? I'm having some problems fitting it... The body pin in the back of the receiver and the thinner pin near the selector don't go in. It seems like I have to move the gearbox a bit upwards and forwards. I might need some filling.

January 26th, 2007, 17:06	#7
Xepharo Trader rating Join Date: Apr 2004 Location: Vancouver, Canada	yeah.. seems like I might need to do that... grrr However, I've done enough filing on this guarder metal body, I don't want to hurt it anymore, especially not my gearbox. I'm just going to buy a Hurricane metal body, and see if that will fit better. I never had any problems with Hurricane metal bodies fitting with different gearboxes somehow.

Gearbox 2 Shooting full auto without any pull of trigger on Semi

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