New Stihl ms250, won't start

[Sess21]

Hi all. I'm new to chainsaws and small motors and looking for help.
I bought a new Stihl ms250 last fall and used it a few times. Then I made the mistake of letting it sit with the fuel in it (premium and hp ultra synthetic mix). Anyway, here we are 3 or so months later and I can't get it to start. I emptied it, cleaned the muffler, checked the air filter, disassembled the carb and cleaned it (it looked clean), and check that it had a spark (it does).
I received an emergency call from a lawn care customer and of course I need the saw this afternoon. Should I just make more mix and pray, should I buy the 0 ethanol gas from HD, is there some other kind of starter fluid I should purchase? Any advice is appreciated!

 

[HarleyT]

Make more mix for sure, stale old fuel won't burn. Use a dribble of it directly into the carb to try to start it.
Take off the bar/chain while you are trying to get it going.

 

[Chris-PA]

3 months isn't that long. I'd bet it's something else, although I'd dump the fuel just to be sure anyway.

 

[LoveStihlQuality]

Don't use starting fluid. It has no lubrication. Possibly flooded. Try keep throttle in wide open with switch in Run position (no choke ) May take dozen or so pulls. If still no luck, dealer should help under warranty. I have one. Nice saw that can do a lot.

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[LoveStihlQuality]

3 months isn't that long. I'd bet it's something else, although I'd dump the fuel just to be sure anyway.

+1 Also pick up a few cans of Motomix or Trufuel canned fuel. More expensive but long shelf life and can leave in saw without worry. Ethonol free and has stabilizer. I run it in saws when finished cutting.

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