Literally. It has been running perfectly fine. It was running perfectly fine. I finished my cut and it just turned off, no coughing, no bogging, no sputtering; it went from full throttle to off. When I tried to restart it, I got nothing. Again, literally nothing, no cough, sputter, smoke, just nada.
Now the things I know I've done wrong
It's four years old and I've never done a tune up. But I've also ran less than two gallons of gas through it.
Which has already set off alarm bells in many of your heads and you're right: I'm that new guy who stored it with gas in the tank.
And you're right again, I'm using old, but stabilized gas.
May or may not be related:
I just changed the chain because I didn't feel like sharpening the one that was on it. I had a VERY dangerous ADD moment and forgot to tighten the bar nuts. Believe me when I say I'll never run a saw again without my meds. After a few attempts at trying to start it I noticed I was missing a nut and the second one was loose but the bar still seemed snug enough. Unsure when that nut came off.
Been running 0w20 or 0w40 Mobile One as bar oil... I was under the impression it just means I go through it faster because it's thinner and isn't "sticky".
Things I checked:
Seems to have compression, and guy at dealer confirmed that
Is not seized, I assume I couldn't pull it if it were and guy at dealer confirmed that it's not.
Chain tension seemed fine, bottom pulled down the right amount, and dealer guy confirmed that
Dealer guy said 1-2 weeks before they could look at it but I want my saw now because it's a great source of exercise and stress relief haha. I'm fairly mechanically inclined and have done a lot of work on cars and golf carts with little more guidance than what I've pulled from Google, forums, and YouTube. But...when I googled my problem all I got was a thread on here about a guy with a seized Stihl and that wasn't much help (though it did say something about redoing the cylinder with an aftermarket kit and getting more power out of it. And that did interest me. Are there aftermarket upgrades for these saws?).
In my head it seems like a fuel or spark issue with either the fuel line being completely occluded or the plug being totally dead. Anyone have any thoughts? Any information I've left out? Any good source for a tune-up/maintenance kit and how to or should I just grab it from the dealer and try it instead of waiting two weeks?
tl;dr
Four year old chainsaw with old gas and no tune up go brrrrrt always, then no more brrrrt suddenly. Chuck go wtfmate ¯\_(ツ)_/¯
Now the things I know I've done wrong
It's four years old and I've never done a tune up. But I've also ran less than two gallons of gas through it.
Which has already set off alarm bells in many of your heads and you're right: I'm that new guy who stored it with gas in the tank.
And you're right again, I'm using old, but stabilized gas.
May or may not be related:
I just changed the chain because I didn't feel like sharpening the one that was on it. I had a VERY dangerous ADD moment and forgot to tighten the bar nuts. Believe me when I say I'll never run a saw again without my meds. After a few attempts at trying to start it I noticed I was missing a nut and the second one was loose but the bar still seemed snug enough. Unsure when that nut came off.
Been running 0w20 or 0w40 Mobile One as bar oil... I was under the impression it just means I go through it faster because it's thinner and isn't "sticky".
Things I checked:
Seems to have compression, and guy at dealer confirmed that
Is not seized, I assume I couldn't pull it if it were and guy at dealer confirmed that it's not.
Chain tension seemed fine, bottom pulled down the right amount, and dealer guy confirmed that
Dealer guy said 1-2 weeks before they could look at it but I want my saw now because it's a great source of exercise and stress relief haha. I'm fairly mechanically inclined and have done a lot of work on cars and golf carts with little more guidance than what I've pulled from Google, forums, and YouTube. But...when I googled my problem all I got was a thread on here about a guy with a seized Stihl and that wasn't much help (though it did say something about redoing the cylinder with an aftermarket kit and getting more power out of it. And that did interest me. Are there aftermarket upgrades for these saws?).
In my head it seems like a fuel or spark issue with either the fuel line being completely occluded or the plug being totally dead. Anyone have any thoughts? Any information I've left out? Any good source for a tune-up/maintenance kit and how to or should I just grab it from the dealer and try it instead of waiting two weeks?
tl;dr
Four year old chainsaw with old gas and no tune up go brrrrrt always, then no more brrrrt suddenly. Chuck go wtfmate ¯\_(ツ)_/¯
Remember friends holding bags of ice over them to cool them off so they could make it home. 
