The only time I've had issues with Mtronic the following:
1. Cutting off the saw too quickly after a long cut - This will sometimes create a no-start or hard start issue but eventually it starts up.
2. Running the saw out of fuel in a along cut - Again, causes no start or hard start issue.
That's it. Now that I know to idle the saw for a bit after a long cut and to stop the saw and re-fuel at the first hint of low fuel. I've not had a no-start or hard start scenario in years. I've run the saw at -25ºF up to 100ºF. I gave my uncle these same tips when he bought his first Mtronic saw and he's never had a hard start issue. He heats almost 5000sqft with an outdoor boiler and goes through a LOT of mix in a year. His saw stays in the uninsulated shed and even after a few -30ºF nights it started just fine.
1. Cutting off the saw too quickly after a long cut - This will sometimes create a no-start or hard start issue but eventually it starts up.
2. Running the saw out of fuel in a along cut - Again, causes no start or hard start issue.
That's it. Now that I know to idle the saw for a bit after a long cut and to stop the saw and re-fuel at the first hint of low fuel. I've not had a no-start or hard start scenario in years. I've run the saw at -25ºF up to 100ºF. I gave my uncle these same tips when he bought his first Mtronic saw and he's never had a hard start issue. He heats almost 5000sqft with an outdoor boiler and goes through a LOT of mix in a year. His saw stays in the uninsulated shed and even after a few -30ºF nights it started just fine.