Chainsaw question

[220]

After the first tank of TruFuel to see how it ran, I went ahead and added some extra 2 stroke oil to the rest of the can.

Having said that, the current manual says "If not using MotoMix, use only STIHL two-stroke engine oil or equivalent high-
quality two-stroke engine oils that are designed for use in air cooled two-cycle engines." There is no recommendation for 25:1 ratios. I believe the 25:1 recommendation is from older Stihl manuals when 2 stroke oils were not up to the standards they are today.

I stand corrected it looks like they have updated their recommendations since I last looked and that was only 12 months back, it does indeed say 50:1 provided the oil meets or exceeds the relevant standards.
Interesting they also say E10 is fine but recommend not using fuel mix more than 30 days old and something I hadnt seen before which is the recommendation to change the fuel pickup body every year.

[clovishound]

Mine is still the original fuel pickup, 4 years old or so. I have checked it and it looks clean as a whistle. Again, my saw has very few hours on it.

I've seen the video where they leave different types of fuel, with and without stabilizer, in jars with aluminum and rubbers parts for a year. The more percentage of ethanol, the more damage, especially to the aluminum. The stabilizer helps, but not that much. The ethanol free gasoline showed little to no damage. This is one reason I'm switching to canned mix. This same video tried running the gas after it sat for a year. The ethanol free needed some help from starting fluid to get started, but ran. The ethanol fuel wouldn't run even with help from starting fluid. The stabilizer didn't help at all with this.

[220]

All mine still have the original pickups and at least one of them is over 15yo. Even the newest of them would have over 200hrs, most fuel has a fairly short shelf life.

[GeoBoy]

Mine is still the original fuel pickup, 4 years old or so. I have checked it and it looks clean as a whistle. Again, my saw has very few hours on it.

I've seen the video where they leave different types of fuel, with and without stabilizer, in jars with aluminum and rubbers parts for a year. The more percentage of ethanol, the more damage, especially to the aluminum. The stabilizer helps, but not that much. The ethanol free gasoline showed little to no damage. This is one reason I'm switching to canned mix. This same video tried running the gas after it sat for a year. The ethanol free needed some help from starting fluid to get started, but ran. The ethanol fuel wouldn't run even with help from starting fluid. The stabilizer didn't help at all with this.

Starting fluid is one of the worst things you can use on a 2 cycle engine. I can damage the ring lands on the piston. Don’t use it.

[clovishound]

It was a four stroke engine he was using it on. Yeah, starting fluid and 2 strokes don't seem like a good mix. Sounds like a great way to starve an engine of lubrication. Heck, I don't even like running them dry on fuel, thinking that they may run shy of lube when they lean out before the gas runs dry.