When our chainsaw
first started having trouble I thought it might be an ethanol problem.
Dumping out the questionable
fuel and adding a small amount of MotoMix helped me to quickly rule out
an issue with the fuel.
Pre-mixed
2 cycle fuel is a sure
fire way to know you don't have ethanol that's attracted water to your
tank. It's also a good idea to leave a little bit of this stuff in the
system to prevent rust that might happen over the winter storage months.