Top M249 Motor Spark & Smell?

Yuu · June 4th, 2007, 21:00

Well, I'm stumped really. Just today I received a new battery 8.4v 3500mah NiMH and I just test fire the gun without the buttstock and I noticed a odd smell and when I took look at the motor and pull the trigger again signs of sparks was shown inside the motor. Then I try with my 8.4v 1700 mah NiCad and produced the same result, motor sparks inside and smell.

However, everything is running smoothly, fuse is fine and the wiring is fine is it just the motor dying? Could someone just educate me if this is normal for all motor to spark every time the trigger is pulled? If not, time for me to get motor replace or gearbox replacement..

Death March · June 4th, 2007, 21:22

It's running fine! Well from what you say, as no one else is there to check it right! But it does sound fine !

Yuu · June 4th, 2007, 22:00

Quote:

Originally Posted by Death March

It's running fine! Well from what you say, as no one else is there to check it right! But it does sound fine !

I'm not sure at all, sounds normal when it shoots no awful sounds, burning smell could be the dust or the greese some people had stated on other threads, but sparks in the motor? I don't want my 2k MG going up in flames.. lol

ThunderCactus · June 4th, 2007, 22:15

the burning smell is normal to most electric motors in machineguns, the sparking means you need a new motor, your armature might be bent and its not worth fixing lol

Yuu · June 5th, 2007, 01:30

Quote:

Originally Posted by ThunderCactus

the burning smell is normal to most electric motors in machineguns, the sparking means you need a new motor, your armature might be bent and its not worth fixing lol

lol How could the armature be bent? Well, I have to lower replacement gearbox then... argh..

Spa · June 5th, 2007, 15:20

yeah, sparks are not good.. lol. like thudnercactus said, time to get it replaced.

Death March · June 6th, 2007, 02:22

The sparks can also indicate that the brushes need to be de-bured.The comm,has seated into the brush and you can just use a file @ a 45 deg. angle remove the high edge and use a comm stick and resurface the brush,give it a shot of some motor spray (can buy at R/C store!) and clean out the motor.Much cheeper than a new motor! Some sparking is normal thow,depends on how much? Motors do get dirty from all that Carbon and copper flying around.How old is the motor/how many rounds? The comm stick also has an end to clean & polish the comm. as well as the brush.Last comm stick I bought was $6.00,motor spray $8.00.Might just do the trick!
I'm not sure about a bent comm,could happen I guess.The motor probley would not turn over if it was bent that bad.Sparking more to do with wear pattery and current being pulled through the motor.ie if you were using a M130 spring insted of a stock one,the m130 would need more power to turn over and draw more current than a stock set up.I would just try and clean the motor as you were saying theres no other problem you'v noticed with the gun other than the smell(usally alittle bit) and some sparks(witch is also normal to a point).Next time you use a drill,look in the back were the comm, is,you'll see lots of sparks! Have a good one!

Yuu · June 6th, 2007, 04:44

Quote:

Originally Posted by Death March

The sparks can also indicate that the brushes need to be de-bured.The comm,has seated into the brush and you can just use a file @ a 45 deg. angle remove the high edge and use a comm stick and resurface the brush,give it a shot of some motor spray (can buy at R/C store!) and clean out the motor.Much cheeper than a new motor! Some sparking is normal thow,depends on how much? Motors do get dirty from all that Carbon and copper flying around.How old is the motor/how many rounds? The comm stick also has an end to clean & polish the comm. as well as the brush.Last comm stick I bought was $6.00,motor spray $8.00.Might just do the trick!
I'm not sure about a bent comm,could happen I guess.The motor probley would not turn over if it was bent that bad.Sparking more to do with wear pattery and current being pulled through the motor.ie if you were using a M130 spring insted of a stock one,the m130 would need more power to turn over and draw more current than a stock set up.I would just try and clean the motor as you were saying theres no other problem you'v noticed with the gun other than the smell(usally alittle bit) and some sparks(witch is also normal to a point).Next time you use a drill,look in the back were the comm, is,you'll see lots of sparks! Have a good one!

Thanks, for the help. But since I have no experience on electronics at all I don't want to touch the motor at all, but the gearbox is wored when I bought from another user. However, I do remember that some dust metal (When I was filing my M249) the dust metal attach itself to the motor and I try my best to get it out of the motor, I guess some were left behind in it.

The TOP lower gearbox is old design and the entire motor is solder with the wires and attached to the switch and its bitch to take out, but everything else is fine which is good.

I know BC local gun doc isn't available anymore, or at least the well known one.

Ibby · June 6th, 2007, 15:28

+1 for what Death March mentioned. Any electric motor will spark to some degree. The particular motor that TOP uses will spark quite a bit. Cleaning the brushes and commutator as mentioned above will reduce it quite a bit if done properly. It's a very simple job to do. The other nice thing about TOP 249's is that a lot of RC car motors can be bought that fit in the mechbox easily. As for cleaning out the metal filings from the motor, I'd recommend using automotive brake cleaner. Just go to town on the motor with some and it'll be clean as a whistle. It will remove any grease and loose debris, so you may need to regrease the mechbox when you're done.
The smell is quite normal as stated above. New motors will smell a bit when they're first broken in, and can smell later on if they encounter a higher than normal load or grease or oil get in them. Good luck with your gun!

freewheelin4eva · June 10th, 2007, 23:53

I used to be real big into rc car racing. You will always get a particular smell from your motor, you will always get arking as well, to take your motor apart if the com is really in bad shape, you could take it to a hobby shop and get it turned for 10 bucks. also about using brake clean to clean your motor, brake clean leaves a residue, only use electric motor cleaner. and put a drop of oil on each bushing once in a while.

austin91F · October 11th, 2011, 05:03

Where you able to find a motor because I need a new one

austin91F · November 9th, 2011, 23:07

So this is for anyone who has a problem like this and cannot find a single person to help you. I litterally searched every where but I did find a motor a Guarder high torque short type will mount on your gun but not the pinion head so you will need to swap them and make adjustments to place it in the right spot hope this helps those who have the same problems

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

June 4th, 2007, 21:22	#2
Death March Trader rating Join Date: Feb 2006 Location: Manitoba	It's running fine! Well from what you say, as no one else is there to check it right! But it does sound fine ! __________________ Death Before Dishonor" Bleeding Black Label"

June 6th, 2007, 02:22	#7
Death March Trader rating Join Date: Feb 2006 Location: Manitoba	The sparks can also indicate that the brushes need to be de-bured.The comm,has seated into the brush and you can just use a file @ a 45 deg. angle remove the high edge and use a comm stick and resurface the brush,give it a shot of some motor spray (can buy at R/C store!) and clean out the motor.Much cheeper than a new motor! Some sparking is normal thow,depends on how much? Motors do get dirty from all that Carbon and copper flying around.How old is the motor/how many rounds? The comm stick also has an end to clean & polish the comm. as well as the brush.Last comm stick I bought was $6.00,motor spray $8.00.Might just do the trick! I'm not sure about a bent comm,could happen I guess.The motor probley would not turn over if it was bent that bad.Sparking more to do with wear pattery and current being pulled through the motor.ie if you were using a M130 spring insted of a stock one,the m130 would need more power to turn over and draw more current than a stock set up.I would just try and clean the motor as you were saying theres no other problem you'v noticed with the gun other than the smell(usally alittle bit) and some sparks(witch is also normal to a point).Next time you use a drill,look in the back were the comm, is,you'll see lots of sparks! Have a good one! __________________ Death Before Dishonor" Bleeding Black Label"

June 6th, 2007, 15:28	#9
Ibby Trader rating Join Date: Aug 2003 Location: Victoria/Kingston	+1 for what Death March mentioned. Any electric motor will spark to some degree. The particular motor that TOP uses will spark quite a bit. Cleaning the brushes and commutator as mentioned above will reduce it quite a bit if done properly. It's a very simple job to do. The other nice thing about TOP 249's is that a lot of RC car motors can be bought that fit in the mechbox easily. As for cleaning out the metal filings from the motor, I'd recommend using automotive brake cleaner. Just go to town on the motor with some and it'll be clean as a whistle. It will remove any grease and loose debris, so you may need to regrease the mechbox when you're done. The smell is quite normal as stated above. New motors will smell a bit when they're first broken in, and can smell later on if they encounter a higher than normal load or grease or oil get in them. Good luck with your gun! __________________ "Anyone with a name like Amanishourbariki should give a few letters to the poor Ng family." - Snarfangel, Fark.com

June 4th, 2007, 22:15	#4
ThunderCactus Not Eye Safe, Pretty Boy Maximus on the field take his picture! Trader rating Join Date: Feb 2007	the burning smell is normal to most electric motors in machineguns, the sparking means you need a new motor, your armature might be bent and its not worth fixing lol

June 5th, 2007, 15:20	#6
Spa Trader rating Join Date: Oct 2006 Location: Winnipeg, Manitoba	yeah, sparks are not good.. lol. like thudnercactus said, time to get it replaced.

June 10th, 2007, 23:53	#10
freewheelin4eva Trader rating Join Date: Mar 2007 Location: Cow town	I used to be real big into rc car racing. You will always get a particular smell from your motor, you will always get arking as well, to take your motor apart if the com is really in bad shape, you could take it to a hobby shop and get it turned for 10 bucks. also about using brake clean to clean your motor, brake clean leaves a residue, only use electric motor cleaner. and put a drop of oil on each bushing once in a while.

October 11th, 2011, 05:03	#11
austin91F Trader rating Join Date: Oct 2011 Location: Utah	Where you able to find a motor because I need a new one

November 9th, 2011, 23:07	#12
austin91F Trader rating Join Date: Oct 2011 Location: Utah	So this is for anyone who has a problem like this and cannot find a single person to help you. I litterally searched every where but I did find a motor a Guarder high torque short type will mount on your gun but not the pinion head so you will need to swap them and make adjustments to place it in the right spot hope this helps those who have the same problems

Top M249 Motor Spark & Smell?

Doctor's Corner