M Tronic Reset

[Duane(Pa)]

When, and how to reset for different versions? Production dates for different versions? No guessing! Poast good information not "my buddy read you're supposed to..."

 

[SimonHS]

How To Perform An M-Tronic Reset | STIHL Blog

STIHL M-Tronic machines are designed to perform at their best at all times, but they sometimes need a reset. Find out when and how to reset them here.

blog.stihl.co.uk

 

[bogieboy]

If mtronic 2.0 its leave in choke for 90 sec and shut down, if 3.0 its choke for 30 sec then pin full throttle, it will rev limit at 3/4 speed til it has "set", usually another 30 sec. Good times to do reset are after filter swaps, i also usually start the day with a reset, so the saw acclimates to the current weather conditions.

Fyi i am a certified stihl mechanic...

 

[bogieboy]

Also, if saw is 2.0 it usually wont have any markings from memory, but on the emmissions lable there will be an M3.0 if its 3.0, see on this ms261

 

[old saw fixer]

I was, too. It was many years ago though. My grandson works at an Ace Hardware, they want to send him to Va. Beach to school. I would have loved to have gone myself, but alas... nobody can be smarter than the boss!

 

[Duane(Pa)]

If mtronic 2.0 its leave in choke for 90 sec and shut down, if 3.0 its choke for 30 sec then pin full throttle, it will rev limit at 3/4 speed til it has "set", usually another 30 sec. Good times to do reset are after filter swaps, i also usually start the day with a reset, so the saw acclimates to the current weather conditions.

Fyi i am a certified stihl mechanic...

I'm guessing it should be at operating temperature prior to any long duration throttle pinning? So, if a reset isn't performed, will the saw gradually bracket itself into proper tune over time?

 

[Duane(Pa)]

How To Perform An M-Tronic Reset | STIHL Blog

STIHL M-Tronic machines are designed to perform at their best at all times, but they sometimes need a reset. Find out when and how to reset them here.

blog.stihl.co.uk

Awesome information!

 

[bogieboy]

I'm guessing it should be at operating temperature prior to any long duration throttle pinning? So, if a reset isn't performed, will the saw gradually bracket itself into proper tune over time?

It really doesnt matter, as the saw self limits the rpm with a secondary rev limiter, so it is cooling and adding extra oil on the non-ignition event strokes. If the saw doesnt have a reset done, in the course of 10-20 cuts (in my experience) it will find its tune, but may run slightly erratically until then if the reset isnt performed.

 

[Stump Shot]

I'm guessing it should be at operating temperature prior to any long duration throttle pinning? So, if a reset isn't performed, will the saw gradually bracket itself into proper tune over time?

It's going to tune itself to where it wants to be no matter the starting point. In other words, it doesn't matter if it starts from point "A" or point "B" it's still going to tune itself to point "C".
A reset really isn't necessary unless there's some sort of malfunction and it needs to be pulled out of its funk so to say to operate normally again. There are times that just a re-start is all that is needed and if not, then a reset should be performed, then if not still, there's a problem that needs repaired before the saw will run right again.

 

[bigbadbob]

got 2 661 stihls. Both i have no history on but.
neither will got into reset either method,, no label on saw foot.
Saw will not go to fast idle with choke.
have changed injector, metered the harness,,,
Mtronic sucks.
Have a 261 that was a bear to get into reset.
Finallly one day it goes into reset and has been fine since,, bet the brain bucket was confused,,
dealer want $50 to scan it,,(261) last scan showed nothing wrong,,,
rant off!!

 

[Duane(Pa)]

got 2 661 stihls. Both i have no history on but.
neither will got into reset either method,, no label on saw foot.
Saw will not go to fast idle with choke.
have changed injector, metered the harness,,,
Mtronic sucks.
Have a 261 that was a bear to get into reset.
Finallly one day it goes into reset and has been fine since,, bet the brain bucket was confused,,
dealer want $50 to scan it,,(261) last scan showed nothing wrong,,,
rant off!!

I'm not sure they fast idle in start position? in fact, pretty sure non of mine do...

 

[bigbadbob]

I'm not sure they fast idle in start position? in fact, pretty sure non of mine do...

Well i meant the choke start position,,,like cold start or reset as per instruction's

 

[Duane(Pa)]

Well i meant the choke start position,,,like cold start or reset as per instruction's

So neither one will run with the lever down?

 

[bigbadbob]

So neither one will run with the lever down?

They will run,, but you have to use the throttle,, or they die,

 

[huskihl]

For what it’s worth, I always replace the fuel solenoid and filter first on one with running problems. Had a 201t that was idling high. Thought it would figure itself out in time. Replaced solenoid and it was good. 5 minutes later it came back. Bought a new carb and it was good. 5 minutes later it came back. Bought a new coil and it still runs great.

My consensus is that it’s usually the solenoid. If not, it’s the coil even when it sounds like it’s a carb issue

 

[Wilhelm]

 

[bigbadbob]

For what it’s worth, I always replace the fuel solenoid and filter first on one with running problems. Had a 201t that was idling high. Thought it would figure itself out in time. Replaced solenoid and it was good. 5 minutes later it came back. Bought a new carb and it was good. 5 minutes later it came back. Bought a new coil and it still runs great.

My consensus is that it’s usually the solenoid. If not, it’s the coil even when it sounds like it’s a carb issue

my thought also,, i have changed the solenoid on the one and no change,,

 

[Stump Shot]

My consensus is that it’s usually the solenoid. If not, it’s the coil even when it sounds like it’s a carb issue

That makes a lot of sense, as the coil has control over the carburetor to make changes, not the other way around.

 

[huskihl]

That makes a lot of sense, as the coil has control over the carburetor to make changes, not the other way around.

Yep. It’s the brain of the whole system.

 

[drf256]

I did a few resets when I first learned it could be done. Haven’t done one in years.

Seems like the saws don’t GAF how much I fondle them, they always figure it out on their own.

If a saw doesn’t run after mods, it’s never been that it’s needed a reset to do so. At least for me.