What this part does Replacement carburetor compatible with a wide range of small-engine carburetor applications, including chainsaws, irrigation engines, equipment engines and similar devices. Designed to manage air and fuel flow reliably to restore engine start, stabilize idle and provide sufficient power during acceleration. Key benefits — why you need it Broad compatibility: fits Stihl FS400, FS450, FS480, SP400 and other equipment that use the Zama C1Q‑S34H design. Durable construction: full metal carburetor assembly provides hardness and wear resistance for long service life. Stable performance: strong, consistent operation that helps with engine starting, speed stability and improved acceleration response. Direct replacement: listed as compatible with Zama C1Q‑S34H and part number 41281200651 for straightforward identification and fit. Important attributes Function: controls air/fuel mixture and delivers it to the engine reliably. Compatibility: Stihl FS400, FS450, FS480, SP400; Zama C1Q‑S34H; part number 41281200651. Material: high‑quality metal construction for durability and wear resistance. Performance: stable idling, improved acceleration delivery, assists with reliable starting (including when used on multi‑cylinder engines as noted). Typical use scenarios 1. Field repair or maintenance: replace a worn or leaking carburetor on a Stihl FS400/FS450/FS480/SP400 trimmer to restore starting reliability and consistent throttle response. 2. Equipment service: install as a replacement on small engines in irrigation pumps or handheld power equipment that use the Zama C1Q‑S34H pattern to return equipment to reliable operation. 3. Spare parts for technicians: keep as a durable spare to minimize downtime during service calls where a faulty carburetor is causing poor idle, hard starting or loss of power. Notes for buyers Verify compatibility with your equipment using model numbers Stihl FS400, FS450, FS480, SP400 and the Zama C1Q‑S34H / 41281200651 reference before purchase. The unit is a metal carburetor assembly intended as a replacement part; professional installation is recommended if you are not experienced with carburetor maintenance.