Stihl 441 Won't idle

[Aled Hughes]

Can anyone help as my fully rebuilt 441 won't idle. Low jet is at 1/4 turn out and idle screw fully in. Thanks 

[Muddy42]

Are you sure you mean low at 1/4 out, normally saw won't run at that?

 

I start with both H and L out by 1.25 / 1.5 turns and a little bit of idle so its engaging the throttle.  I then tune the L so its a bit richer than peak revs.  Then do H with the tach. All this time the chain should be spinning because idle is screwed in a bit.  Then undo the idle screw until the chain stops spinning. The idle should only just be engaging the throttle, if you know what I mean.

 

Are you saying you get to this stage and the saw dies when the chain stops spinning?

 

When you say fully rebuilt, I presume this means new everything - spark plug, air filter, fuel line, impulse line, carb kit?  Have you performed a pressure test?

[Aled Hughes]

4 minutes ago, Muddy42 said:

Are you sure you mean low at 1/4 out, normally saw won't run at that?

 

I start with both H and L out by 1.25 / 1.5 turns and a little bit of idle so its engaging the throttle.  I then tune the L so its a bit richer than peak revs.  Then do H with the tach. All this time the chain should be spinning because idle is screwed in a bit.  Then undo the idle screw until the chain stops spinning. The idle should only just be engaging the throttle, if you know what I mean.

 

Are you saying you get to this stage and the saw dies when the chain stops spinning?

 

When you say fully rebuilt, I presume this means new everything - spark plug, air filter, fuel line, impulse line, carb kit?  Have you performed a pressure test?

All sorted now thanks, i read in manual 1/4 out on low but obviously that's incorrect. Set it to 1.25 and like you said regarding the idle screw just touching and turn in until it idles thanks 

[Muddy42]

18 minutes ago, Aled Hughes said:

All sorted now thanks, i read in manual 1/4 out on low but obviously that's incorrect. Set it to 1.25 and like you said regarding the idle screw just touching and turn in until it idles thanks 

 

Awesome! Glad it was an easy fix!

 

I'm not sure of your knowledge level but you should only consider 1.25 out as a starting point.  The saw will start at this but make sure you do actually tune from there to get the best performance. Really be careful with the H settings and high revs because this can destroy a saw very quickly.  I leave the H at default or use a tachometer and keep the revs comfortably on the safe side of max.

 

 

 

[Husqvarna King]

There is a good video of chainsaw tuning on Steve’s small engine saloon on YouTube 

 

[Aled Hughes]

1 hour ago, Muddy42 said:

 

Awesome! Glad it was an easy fix!

 

I'm not sure of your knowledge level but you should only consider 1.25 out as a starting point.  The saw will start at this but make sure you do actually tune from there to get the best performance. Really be careful with the H settings and high revs because this can destroy a saw very quickly.  I leave the H at default or use a tachometer and keep the revs comfortably on the safe side of max.

 

 

 

I build saws crank up just as a hobby really and when i saw 1/4 turn in the online manual i thought that's odd but as i generally build huskys i thought ok so hence the issue. So glad you ad a community are out there. I do have a genuine husky tacko so high jet setting won't be an issue thanks for your reply.

[spudulike]

The clip assumes the limit caps are in place!

[Muddy42]

13 hours ago, spudulike said:

The clip assumes the limit caps are in place!

Yes that explains the manual too - limiter caps!

[spudulike]

That is what I meant, a "clip", section, page, extract of the manual assumes limit caps.