Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Gas line problems

It worked well out of the box until it ran out of gas. After refueling, I pumped the primer whereupon it collapsed. The unit worked for a while, but gradually the engine seemed sluggish and unresponsive, and eventually petered out. I took it to a dealer (ditto the Weedeater customer service info problems mentioned) who replaced the primer bulb (its collapse created a vacuum that deprived the engine of fuel, he said). It worked well until it ran out of gas. Halfway through the second tank I noticed the same engine problems gradually appearing, and the primer bulb seemed spongy. Perhaps it would be better to say the vacuum collapsed the bulb the first time. This time it went back to Amazon.