Half a stroke
 

Hi guys,,,,,,,,,,I have a small problem with my TM M16A2,I bought it
from koing and it worked great.The problem is,now when you pull the
trigger,it only cycles half way and won't finnish on semi or auto,and the
fuse also blows.I have looked through the mech box and operated it
manually and it works.Could this be the motor,it was new so I understand.
I tried the motor hooked up but out of the grip and it runs fine.

dead battery?

How can a dead batt. toast a fuse then??

Screwed up mechbox? Spring too strong? Mechbox not assembled properly? Motor not set properly? Fuse too weak? Battery too strong for the setup?

All guesswork unless we know exactly what is in that gun.

It is all systema up grade parts,I think the motor is a ec1000 torgue II,
and a 100 spring,fuse is stock 1.5a.Mech box still only went half way
when I by passed the fuse.The list of parts Koing had listed in the
classified section is gone and I don't have the gun and parts here.

OK..it worked then topped working. You inspected the box and it operates from a mechanical perspective.

I am betting electrical. A battery than can run a motor with no load won't necessarily drive that same motor under load.

I would suggest trying it with another battery before doing anything else. Let us know what happens.

Beyond that, you may have a short somewhere along the line that is blowing fuses.

That is why I thought it might be the motor,just wondering if
someone else had a similair problem.

Make sure your fuse is rated for at least 15amps.

You could be right and I was incorrect that the fuse was 1.5 and is
in fact a 15amp.It is the stock fuse according to the book.But I had
by-passed the fuse and still the same problem.I am not good with
electircal things.

I'm betting a tight shim job.

Are the shims the little washers on the gear spindles against the frame?

yes

If it was tight the gears wouldnt move at all, thats what i think. I think his spring is slipping off the spring guide and not allowing the piston to come pully back jammnig the sector gear. thats why is stopping half way in the cycle.

Honestly, and no offence, sometimes your best bet is to find a local expert/doctor and have them look at it.

Uhh... yes. It would still move, given the shims weren't so tight that it caused the gears to seize with zero resistance on it.

If there was 50% resistance, all it needs is the resistance from the spring to cause a full seizure, unless the motor had an extreme level of torque to power it through.

I think the possibility of a spring slipping off a spring guide is pretty much impossible. I can't see how it is physically possible at all. Perhaps you could shine some more light on the subject?