Stihl 020 buggerage

[Treerover]

This weeks saw conundrum !!!!

My 020t was occasionally racing during a days use but largely fine. Great at starting and oodles of power.

I though however I’d change the carb to a Chinese model but have found that although it starts fine and revs fine, it won’t run on idle even with the idle screw wound all the way in.

I have swapped back to the old carb but now it’s the same , won’t idle.

I’m stuck as to what could have happened .

Any ideas gentle folk ?

I’m baffled [emoji53]

[Khriss]

 Buy a Husqvarna

( I JUST DID ! Walking stick is Mum's,  no..... it's realy mum's )

 

[Khriss]

Wondering if it is an air leak issue, how old is saw ? Been problematic previously ? Done all yr usual service checks air-plug- filters etc ?

[Treerover]

Wondering if it is an air leak issue, how old is saw ? Been problematic previously ? Done all yr usual service checks air-plug- filters etc ?

Yes swapped plug, does it without filter and fuel/breather hose is less than 12 months old

[spudulike]

Probably a big ol air leak. Normal suspects are impulse line or the intake manifold........but what do I know

[Khriss]

Would look for something happnin recent like a drop from height or dodgey fuel mix. I would have changed carb diafrags an spark plug n go from there. K

[Bolt]

Could the rubber boot thingy between carb and cylinder become damaged / dislodged? 

 

(Or is that what spud said but only in fancier language?).

[spudulike]

28 minutes ago, Bolt said:

Could the rubber boot thingy between carb and cylinder become damaged / dislodged? 

 

(Or is that what spud said but only in fancier language?).

FFS

[Bolt]

7 minutes ago, spudulike said:

FFS

 

Well.......

 

 

 

...That's certainly less fancy language. 

[spudulike]

It was a very valid suggestion and may well be correct!