I have a Homelite 30cc running on gas/glow. I'm using a new OS four stroke glow plug. It has an 11mm Walbro carb and Bennett muffler. I've also been using the "storage fuel" like AV8TOR has described. This storage fuel is just straight gas and oil that is run through the engine for a minute or so when putting the plane away after a day of flying. Anyhow, lately, when I crank the engine for the first time of the day on the gas/glow mix, it starts and runs good (7800 rpm on APC 18x6) for a while and will then just die off when I'm between low to mid throttle. Sometimes I can keep it running long enough to get in the air and fly for a few minutes before it dies. Then when I prime it and start it again, it will run for just a few seconds and die as if it is only running off of the prime. This starting and running for a few seconds repeats over and over. Then, I hook up my external tank with the storage fuel and prime it until I see the straight gas and oil get to the carb. I then crank it and it runs without shutting off. Even without the glow battery it keeps on running and sucking the fuel through the 2 feet of fuel tubing. Of course it sounds rough because it's tuned for the gas/glow mixture, but never the less, it keeps running until I shut it down. I then hook the plane's fuel tank back up and it will then crank and run, but if it shuts off, it won't crank and keep running. It's almost like it needs to be "reset" with the "storage fuel". I've already rebuilt the carb a couple of times and it's still doing this. Can anyone explain why it's behaving this way? What should I do to fix this problem?