Echo weedeater starts, but stalls when pickup up
I've got an Echo weed eater with interchangeable tools. It's only a year old (and if I could find the receipt I'd take it in under warranty), but it's acting up.
The 'gas bubble' never seems to fill up completely, no matter how many times I squeeze it. However, it does start, and if I pick it up carefully, it will run. However, when I rotate it slightly, it starts to run rough, and will stall out very quickly, if I don't return it to level.
I assume it's not a gas problem, as it does run (the gas is fairly fresh, but not new). It's used every other weekend, so it's certainly not worn out, and I doubt anything is blocked. I've checked the air filter which was completely clean.