RE: First gasser, CRRC GF40i kit
Like I say, just a whif of the starting fluid any where near the carb intake, and if your ignition is working, it will run for a little, perhaps enough to get your settings figured out. On a way out of tune or sick engine, I use an intermittent spray to keep it running perhaps a burst every 3 seconds or so. It's just ether, and burns off of real fast. No damage should occur at all. People use it on boats 2 & 4 stroke, cars, lawnmowers, chain saws, weed whackers, edgers, leaf blowers, etc... Most of which are gas engines very similar to your RC motor...
Stop buy your local auto store or Wally World and pick up a can and give it a shot..!!!