Two cycle engine carburetor. If the engine runs rough, the carburetor may be restricted. The carburetor can often be cleaned or rebuilt, but sometimes it may need to be replaced.
Troy-Bilt String Trimmer Model TB21EC Parts are easily labeled on this page to help you find the correct component for your repair. Filter results by category, title and symptom. You can also view diagrams and manuals, review common problems that may help answer your questions, watch related videos, read insightful articles or use our repair help guide to get started. For additional assistance, please contact our customer service number at 1-800-269-2609, 24-hours a day, seven-days a week or send us a message in the live chat box at the top left or bottom right corners of the page.