Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cuts Well/Dies Quickly

It's been one year and I'm on my second unit (first one was replace by Lowes) and now my current one is in the shop getting the carb rebuilt. It had about 4 tanks of gas run through it before its untimely demise and was stored EMPTY over the winter. My local service center AND Troy-Bilt say that additives in the gasoline (alcohols etc) caused the issue. This seems suspicious, but even if this is the case I would expect to get a bit more life out of the trimmer before a carb rebuild is necessary. Both parties are telling me I may need a carb rebuild every year! I'm considering cutting my losses at this point and buying a Stihl instead.