should i get a mosfet?

dinnybyrne

Semi-auto has stopped working on my dboys scar recently. I opened it up and cant figure out if it needs a new cut off lever or switch or if its something else....... If I was to install a mosfet would it cut out the need for the cut off lever and switch? Where would I get a decent one? Cheers lads

Inari

MOSFET's are great, and I'm only a recent convert to them - never got around to them until quite recently.

However, I think you're better off fixing the problem first - if your gun could fire semi, would you still want a MOSFET? If not, then save your money. Or if you do, and would like the features MOSFET's offer, then select a suitable MOSFET and purchase/install it

Does your gun fire in Full Auto on Semi-Auto, or not at all? If it is firing full auto on semi, check the cut off lever to see if it's worn - you can rescue a cut off lever by extending its reach with a bit of epoxy Check the springs on the cut off lever, and make sure everything is functioning as it should, but I would be 90% sure it's just a case of replace or repair your cut off lever

dinnybyrne

thanks.im pretty sure its the cut off lever.so since il have to get a new one why not get a mosfet?kinda wanted one anyway would like to try it out....if they arent too expensive!where did you get yours?

dinnybyrne

btw yes its firing full auto in semi and the selector plate and spring are fine

T4RGET

kinda going in a different direction here, but have you checked the selector plate itself on the outside of the gearbox? does the safe setting still work and can you pull the the trigger in the semi setting?

dinnybyrne

yeah target the plate and spring are fine.pretty sure its the cut off and pretty sure i can fix it,just wondering should i install a cheap mosfet instead?

T4RGET

dinnybyrne wrote: »

yeah target the plate and spring are fine.pretty sure its the cut off and pretty sure i can fix it,just wondering should i install a cheap mosfet instead?

ignore me then, although i would fix the gearbox first like previously mentioned

dinnybyrne

no not ignoring you any reply is greatly appreciated.all of what you said in your previous post works fine i just forgot to mention sorry!so what do you think?

NMTB

it more than likely is the trigger block thats wore down where the cut off lever makes contact with it.mosfets are great but not nessessary.it wont fix your problem though

T4RGET

dinnybyrne wrote: »

no not ignoring you any reply is greatly appreciated.all of what you said in your previous post works fine i just forgot to mention sorry!so what do you think?

didnt literally mean ignore me :P my advice is listen to Kev (Inari). you're better of fixing the problem first and then building from that, other wise you may end up with more problems than you started with

DeBurca

NMTB wrote: »

it more than likely is the trigger block thats wore down where the cut off lever makes contact with it.mosfets are great but not nessessary.it wont fix your problem though

I agree with NMTB it is probally due to the lobe on the moving trigger contact wearing where it makes contact with the cut off lever

dinnybyrne

cheers lads.yeah taught it was the trigger block myself but its hard to guage how worn it is.lucky i have a cheap 2nd hand gearbox coming to me so can get parts out of that.auffice to say il be reparing it before i consider a mosfet,thanks for the great illustration deburca

dinnybyrne

update-
so it turned out to be the cut off lever,pretty obvious it was worn when you put them side by side!fixed now... put a mosfet in my m4 instead,the aws raptor and its excellent if your willing to spend the cash