The "beauty" of using mogas in a Rotax, is that it PREFERS it, though with more frequent oil changes it can tolerate it. So... I can save a boatload of money (not to mention a lot of the places I refuel have no Av Gas), while also doing right by my motor, and it's reduction system/gearbox. I see lots of YouTube videos that start with Rotax fliers fueling up with AvGas, more power to them, but no thanks. I guess maybe they (TRENT PALMER....) are at a field where hauling mogas out to your plane is frowned upon or prohibited, that'd be the only reason I'd use the stuff, and I'd quickly find another airport to base out of, but that's me.

I buy 270 gallons at a time, and trust in the station fuel pumps to deliver usable fuel, they do for all my vehicles, always have, as long as I've been driving, 50+ years. When I gravity flow it into my bulk tank outside the hangar, I don't filter it again, but I do have a filter on my bulk tank pump. That load of fuel pictured cost me $2.12 a gallon, is that less then AvGas ?:P

courierguy wrote:The "beauty" of using mogas in a Rotax, is that it PREFERS it, though with more frequent oil changes it can tolerate it. So... I can save a boatload of money (not to mention a lot of the places I refuel have no Av Gas), while also doing right by my motor, and it's reduction system/gearbox. I see lots of YouTube videos that start with Rotax fliers fueling up with AvGas, more power to them, but no thanks. I guess maybe they (TRENT PALMER....) are at a field where hauling mogas out to your plane is frowned upon or prohibited, that'd be the only reason I'd use the stuff, and I'd quickly find another airport to base out of, but that's me.

I buy 270 gallons at a time, and trust in the station fuel pumps to deliver usable fuel, they do for all my vehicles, always have, as long as I've been driving, 50+ years. When I gravity flow it into my bulk tank outside the hangar, I don't filter it again, but I do have a filter on my bulk tank pump. That load of fuel pictured cost me $2.12 a gallon, is that less then AvGas ?:P

Never mind the gas. I'm sending Tony Soprano over to talk to you about my new house.

The gas is fine. Problem is with the atv. Sorry it took so long for the conclusion. I was up at the lake this week. Got back Saturday evening.

Sunday morning I fueled my log splitter with the suspect gas. The 14 HP Kohler started right up and ran smoothly and strong for almost an hour. Late yesterday I fueled my Aerotrek from my fuel caddy, which was about half "suspect" fuel. After letting it sit overnight I started the Rotax and let it run several minutes, taxied to an out-of-the-way spot on the ramp and did a long run up and then let it idle several more minutes. Then I taxied some more then took off and stayed in the pattern for a few landings then did some air work SW of the field. Ran fine the whole time.

Sorry for the false alarm, but based on the events last week, I was 80-90% certain the problem was with the fuel, rather than intermittent problems with two small engines.

Good discussions in this thread, so not a waste. I still hate to run leaded in this engine but I'm gonna think hard on it.

Pierre

When you hear hooffbeats think horses not zebras. In this case intermittent problems with two small engines just might be a zebra though.