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Does Heat Affect Mtronics in a Stihl?

Discussion in 'Chainsaws and Power Equipment' started by buZZsaw BRAD, May 12, 2023.

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  1. buZZsaw BRAD

    buZZsaw BRAD

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    Now that you mention it the gas was bubbling when I opened the gas cap when it wouldn't hot start. Looked like a carbonated beverage.

    Never knew there was Winter and Summer grade fuels
     
    buZZsaw BRAD, Apr 17, 2026 at 9:04 AM
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  2. Screwloose

    Screwloose

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    My dealer who is a die hard stihl guy won't even touch that stuff.
     
    Screwloose, Apr 17, 2026 at 11:13 AM
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  3. brenndatomu

    brenndatomu

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    The one kid at our local dealer that is a true saw nut, and really knows his stuff, said the same thing...they have to tow the company line for Stihl, but he said if someone specifically asks, he steers them away from it.
    I don't miss it...the stuff stinks! (exhaust smell, not quality...well, both actually!)
     
    brenndatomu, Apr 17, 2026 at 11:49 AM
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  4. Barcroftb

    Barcroftb

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    Well broken in ported ms400 on amsoil dominator its whole life. Cleanest oil I’ve ever used! IMG_6758.jpeg IMG_6762.jpeg IMG_6765.jpeg IMG_6760.jpeg IMG_6759.jpeg
     
    Barcroftb, Apr 17, 2026 at 3:34 PM
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  5. huskihl

    huskihl

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    OIL THREADDDDD!!!!!
     
    huskihl, Apr 17, 2026 at 4:22 PM
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  6. Canadian border VT

    Canadian border VT

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    Or for buZZsaw BRAD
    Amsoil dominator
    Echo red armor
    HP 2

    Or whatever Eggshooterist says
     
    Canadian border VT, Apr 17, 2026 at 4:49 PM
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  7. Eggshooterist

    Eggshooterist

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    I've yet to need to move one to winter setting. Even cutting in the 20's.
     
    Eggshooterist, Apr 17, 2026 at 6:18 PM
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  8. Eggshooterist

    Eggshooterist

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    Plus Motul 710. No particular order for the 3 after dominator.
     
    Eggshooterist, Apr 17, 2026 at 6:27 PM
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  9. Chud

    Chud

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    Are you telling me Stihl Ultra is bad for your saw? Dang I thought the coking gave you higher compression.
     
    Chud, Apr 17, 2026 at 6:37 PM
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  10. Eggshooterist

    Eggshooterist

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    It might...for a while. Lol
     
    Last edited: Apr 17, 2026 at 7:14 PM
    Eggshooterist, Apr 17, 2026 at 6:42 PM
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  11. Barcroftb

    Barcroftb

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    Turns your bearings into unwashed hippies aka crunchy.
     
    Barcroftb, Apr 17, 2026 at 6:47 PM
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  12. Screwloose

    Screwloose

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    I think a specific secret sauce of temperature and humidity coupled with your hat color is required to ice up.
    Sawing my whole life and I didn't know that was a thing until I got a Stihl. Don't ever remember icing up even on the old carb out in the open saws.
     
    Screwloose, Apr 17, 2026 at 8:36 PM
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  13. Ronaldo

    Ronaldo

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    I’ve cut in temps below zero and not changed the winter shutter nor have I needed too.
     
    Ronaldo, Apr 17, 2026 at 8:51 PM
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  14. buZZsaw BRAD

    buZZsaw BRAD

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    Wonder if the temp difference only affects mtronic saws? I've never changed it on most of my saws even my other 400. IIRC I posted a thread about discovering it on my 361.
     
    buZZsaw BRAD, Apr 17, 2026 at 10:13 PM
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  15. huskihl

    huskihl

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    There’s no real difference between an mtronic carburetor and an adjustable carburetor that has anything to do with the fuel tank getting hot. It’s pretty much all of the new saws that are worse about it than older saws whether they are mtronic or not. The lighter they get, there’s less aluminum and magnesium surrounding the engine to act like a heat sink. Could also have something to do with the design of the cylinder laying back towards the carburetor area a little bit, and also the higher performance of today’s saws creating more heat. I think fuel quality in general plays a part in it as well
     
    huskihl, Apr 17, 2026 at 10:32 PM
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