Problem with Stihl electronic carb on MS 362 C-M

allenataylor

allenataylor

Anyone had a problem with the idol on the new electronic carburated stihls? I have been looking but I haven't found a way to adjust the idle yet on the saw. I am worried that its going to be beyond my abilities or not possible without a computer to hook up to it. It has been idling too low and has been dying. An easy fix on the older saws. Any help would be appreciated. The air filter and fuel systems are clean BTW saw is only about 2 months old.

Thanks
 
I know with the huskys they suggest that when the carb needs to be set you run it non stop in wood for 2-3 minutes. This I guess lets the carb warm up and set itself to the proper air/fuel mixture. It has work a couple times with my 562xp after running it out of gas. I dont know if stihl is the same way. Good luck.
 
I'm using the chipped Stihls as well. I just started working at 6,000 ft higher than I was. I heard to do something like that to get the computer to adjust the carb (2-3 minutes full rev). However it isn't working and the saws will not idle at all. I have to start them at full rev and keep them running. They're pretty new saws and I don't it's a fuel or air filter. Any help would be great!
 
Did you try resetting the M-tronic module?
Start the saw in the START/CHOKE position and let it idle for a minute and a half. Then shut it off (don't touch the throttle). Start it up and make a few cuts in wood with it. Sometimes you need to do this if it starts acting up (not wanting to idle, not wanting to start when it's hot, etc.) or changing altitude by a large amount.
 
Thanks JeffGu! I tried this this morning and both saws I had the issue with seemed to idle and run fine. However after using them for 20 minutes they started cutting out whenever I let off the throttle. I think I'm running too rich and the engine is flooding because immediately after this happens it's very hard to start and usually have to start in full choke or force-start.

Could be another issue besides the chips, however it's weird it's the same problem on the only 2 Cs we are running
 
The M-tronic system in my 661 malfunctioned and caused the power head to melt. My saw had similar symptoms to yours Allen. Stihl eventual did replace the power head, but I am a bit leery of it doing it again.
 
So it is happening in multiple saws or just one?

If you continue to have problems, the hard starting has been attributed to malfunctioning solenoids that control the mixture. It's a cheap part, but the saw should be under warranty. Take it back to the dealer and have them check it out.


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Both the 362 Cs we have are doing it. Interesting that the hard starting has contributed to malfunctioning solenoids. That makes sense.

Jackjcc said:
So it is happening in multiple saws or just one?

If you continue to have problems, the hard starting has been attributed to malfunctioning solenoids that control the mixture. It's a cheap part, but the saw should be under warranty. Take it back to the dealer and have them check it out.


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Click to expand...
 
Chewbarka said:
Both the 362 Cs we have are doing it. Interesting that the hard starting has contributed to malfunctioning solenoids. That makes sense.
Click to expand...
Some saws came from the factory with the malfunctioning solenoids. There was also a problem with the carbs themselves, can't remember what that was. It wasn't all carbs of the type, more like they had quality control issues and some problem carbs made it by and got on saws. That's kind of the just I've been hearing. It's supposed to be rare so it's odd that you would have two of them.

What type of fuel and mix oil are you running?


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We are running them on 91 octane, with stihl high performance oil.

I have stihl hp ultra full synthetic I could try. I also have motomix. Which was suggested to me.
 
Chewbarka said:
I tried this this morning...
Click to expand...

I would also like to mention that Stihl specifically says that these saws should always be started in the START/CHOKE position, even when warm. It seems very counter-intuitive, but that's what they're saying. It is even mentioned in the manual. The only two saws I have personal experience with actually doing this were a 362C-M (a friend's) and a 441C-MQ (mine) and in both cases it kept the saws running normally, even though in both cases the saw would sometimes not start on the first pull, so we'd flip it to RUN and it would immediately start. It did, however, run normally as long as we started in the START/CHOKE position first.

Oddly enough, the 661C-M and both of my 261C-MQ saws start and run fine, once warmed up, using the RUN position and not starting from the START position.
I can not imagine why some models are very picky about this, and others are not. At some point I have had to reset the M-tronics on all of them... when I took them to Colorado, for example. When I changed the fuel I was using. When the hot part of summer hit and the temps ran over 90* F, or after doing a muffler mod. It always fixed the problem right away, which in all fairness, is a very cool thing. Beats the hell out of having to tune the carb up everytime these conditions come up, like I do with my non-Mtronic Stihl saws.
 
Wow thank you for the knowledge JeffGu. I actually could get them to start in open choke half of the time yesterday so what you're saying makes sense. I will start doing that all of the time.

We have some 261C's that start fine in the RUN position as well.
 
No problem, buddy... I went through this crap quite a bit, myself, and had to do a lot of research online, talking to dealers, and calling Stihl to get it sorted out. It's really just a bit quirky, and reminds me of a lot of Winblows computer issues... you reboot and it straightens itself out.
 
M
JeffGu said:
I would also like to mention that Stihl specifically says that these saws should always be started in the START/CHOKE position, even when warm. It seems very counter-intuitive, but that's what they're saying. It is even mentioned in the manual. The only two saws I have personal experience with actually doing this were a 362C-M (a friend's) and a 441C-MQ (mine) and in both cases it kept the saws running normally, even though in both cases the saw would sometimes not start on the first pull, so we'd flip it to RUN and it would immediately start. It did, however, run normally as long as we started in the START/CHOKE position first.

Oddly enough, the 661C-M and both of my 261C-MQ saws start and run fine, once warmed up, using the RUN position and not starting from the START position.
I can not imagine why some models are very picky about this, and others are not. At some point I have had to reset the M-tronics on all of them... when I took them to Colorado, for example. When I changed the fuel I was using. When the hot part of summer hit and the temps ran over 90* F, or after doing a muffler mod. It always fixed the problem right away, which in all fairness, is a very cool thing. Beats the hell out of having to tune the carb up everytime these conditions come up, like I do with my non-Mtronic Stihl saws.
Click to expand...
My muffler modded 261 and 661 are pure working beasts....but they been modded before a drop of fuel...and I use non ethanol and stihl ultra mix....I have had loads of saws and nary a prob....too many handlers is usually the problem...no one touches my saws ever...groundman has his own....
 
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