STIHL Intellicarb Carburetors

[Stump Shot]

OK then, why does M-tronic need its own ignition coil and flywheel? I am genuinely curious.

Along with power, it allows the carburetor to get data such as rpm, run solenoids etc. to be able to tune itself. There's an extra set of magnets on the flywheel to perform this function opposite the traditional set of magnets that supply spark to the ignition.

 

[dall]

And ……. I see Dall didn’t get his fix of big black cox full of beans this week ..

Drink more coffee and take your meds

Edit…. It’s xmass so be nice and you may get a chance to fill your knickers from Santa

Lmao I don’t care about that lol

 

[full chizel]

So is M-Tronic the same as unintellicarb? What coil does it need?

 

[Mig_Selv]

The M-Tronic doesn't work with anything else. Coil, flywheel, and carb, are all incompatible.

 

[Mig_Selv]

Come to think of it, would it work if the data magnets are removed from the flywheel, and it's re-balanced?

 

[Merkava_4]

Along with power, it allows the carburetor to get data such as rpm, run solenoids etc. to be able to tune itself. There's an extra set of magnets on the flywheel to perform this function opposite the traditional set of magnets that supply spark to the ignition.

An extra set of magnets on the flywheel and pickups in the coil to generate power for the carburetor? I find that fascinating. ThankYou.

 

[lehman live edge slab]

Come to think of it, would it work if the data magnets are removed from the flywheel, and it's re-balanced?

Waste of time just buy non mtronic parts for the saw if you feel the need to twist a screw driver and think you can do better than the computer.

 

[dall]

Waste of time just buy non mtronic parts for the saw if you feel the need to twist a screw driver and think you can do better than the computer.

they can buy a complete saw maybe
i have mtronic 462 and a carb model but it doesnt have original carb anymore

 

[lehman live edge slab]

They use Walbro as well.

Walbro is almost a think of the past on Stihl since they make zama carbs and actually sell them to husky and echo for some saws

 

[lehman live edge slab]

Hmm. I guess out of the thousands of Echo's I've worked on, I never had to replace a Walbro carburetor on a saw. They're great carbs.
I'm in a bad mood now because of trying to iron out the issues on a couple of 562's. Sometimes being able to adjust the carburetor would be really nice. An autotune saw can mask other issues so well they can be extremely hard to diagnose.

I'm curious if you're a mechanic and if so how many Echo's you have worked on/owned.

Mtronic and autotune saws don’t really mask much they hunt and surge at idle if they have an air leak. Also there’s many times the auto tune will save a saw from the air leak so it’s only a repair not full rebuild because the owner knew something wasn’t quite right maybe but saw was still cutting so they go till it blows. From a manufacturer standpoint it’s substantially better for your warranty claims and everything else because the people capable of tuning a piece of equipment properly is actually a small percentage and probably getting smaller.

 

[EFSM]

The carburetor on a 562xp functions the same as any other carburetor other than it has the ability to tune itself. If you have a fuel delivery problem test the carburetor, if other problems persist, do a pressure/vac test on the crankcase. This is more times than not the culprit of a leaking seal, etc..

One thing that's unbelievably frustrating is trying to reset the Autotune when the saw won't idle for 5 seconds, let alone 4 minutes.

 

[Mig_Selv]

One thing that's unbelievably frustrating is trying to reset the Autotune when the saw won't idle for 5 seconds, let alone 4 minutes.

Well that, and if something isn't working, the only way to find the fault, is to shoot it with the parts cannon.
I'm yet to be in a situation, where I couldn't get a saw without electronics, back up running on the spot.

Lehman has a point though, as the percentage of people able to tune a carburetor proper, is a dying breed.

 

[Mig_Selv]

Waste of time just buy non mtronic parts for the saw if you feel the need to twist a screw driver and think you can do better than the computer.

I probably will. It would be easier if one could trick the coil to work as is.

 

[lehman live edge slab]

I probably will. It would be easier if one could trick the coil to work as is.

What saw is it for?

 

[Mig_Selv]

A 261

 

[lehman live edge slab]

A 261

What’s wrong with it? Or is this a change just to keep anything from happening to the mtronic

 

[Mig_Selv]

The M-Tronic acts up from time to time. I haven't been able to figure why, as it so far has returned to normal after a while.
If it wasn't for the fact that it goes back to normal by itself, I'd have said it's a fuel line that's taking in air.
There's no Stihl dealer within reach. Shooting it with the parts cannon, is not an option.
I like the saw, but I don't bother having to bring a second small saw, just because the 261 is unreliable.
I'm able to tune a carb, and have no benefit from the M-Tronic, so I'd just like to get rid of it.

 

[lehman live edge slab]

The M-Tronic acts up from time to time. I haven't been able to figure why, as it so far has returned to normal after a while.
If it wasn't for the fact that it goes back to normal by itself, I'd have said it's a fuel line that's taking in air.
There's no Stihl dealer within reach. Shooting it with the parts cannon, is not an option.
I like the saw, but I don't bother having to bring a second small saw, just because the 261 is unreliable.
I'm able to tune a carb, and have no benefit from the M-Tronic, so I'd just like to get rid of it.

How old is it? And overall they’re very reliable, have you changed the fuel filter ? I will bet all your problems will go away for about 60$. New fuel filter “orange one” and a new solenoid on carb white for white and if it’s black use a green one. Do a reset and I bet it will run fine. I’ve talked guys at work into the 261c’s and they cut 20-30 chords a year no issues for over 10 years. They are the first generation 261s without retained bar nuts.