stihl b 400????

[stewie]

Left it with the lads on a job and it was working perfect but one of them thought it needed more power so messed about with the carb screws......anyway he gave up when it got to the point of it ticks over fine but when you rev it, it cuts out.... not happy as now I can't get it to rev no matter which way and how much I turn the god dam screws.....

 

It fires up and ticks over but won't rev up and i really need it in action!!

 

Can anyone help???

 

Thanks in advance......

[spudulike]

Try turning the H screw (furthest away form the Engine) all the way in and then out 1 - 1 & 1/4 turns

 

what the feck is B400 anyway:confused1:

[stewie]

Stihl br400! ! A back pack blower!!

 

Bloody auto text lol

[spudulike]

Stihl br400! ! A back pack blower!!

 

Bloody auto text lol

 

My money was on an FS400:lol: reset the H screw as I described, hopefully it will get it back!

[stewie]

Haha!!

 

Cheers spud! Do I just try that even tho the L and "the other screw" have been messed with....

[spudulike]

Haha!!

 

Cheers spud! Do I just try that even tho the L and "the other screw" have been messed with....

 

The L screw will be typically set at one turn - if the engine idles well, it may be OK but can be checked by winding it in until bedded and turning out one turn.

 

Don't use excessive force when doing it up though!

[Warners]

Its a real pain when the lads do that and then hand the machine back 'it doesnt work'

 

Like i've got a puncture? when you check the sidewalls got a hole in it... kerbed!!!

[stewie]

Right been playing with it today and gave up!!! This is as far as I could get it

 

 

can anyone see whats going wrong before I take it in to the service shop?? With the fall coming im going to need it running asap as will have alot of work for it then!!

 

Thanks in advance.......

[wisecobandit]

Sounds like it needs a carb strip and possibly new diaphragm kit fitted and tuning back up.

[stewie]

Was just a dirty fuel filter.....