Description
Overview:
This genuine Stihl throttle shutter (part number 4282 121 3300) is a precision intake plate used in the carburettor of backpack leaf blowers such as the BR500 and BR550. It regulates the volume of air entering the engine, allowing accurate control of engine speed and response across idle, mid‐range, and full throttle. The component is a durable moulded polymer plate designed to rotate smoothly on the throttle shaft and to seal consistently against the bore, supporting reliable starting and steady running. Built to OEM specification, it offers exact fit and function without modification, helping restore performance if the original shutter is worn, warped, or damaged. Suitable for professional and domestic machines that demand consistent airflow control for dependable everyday use.
Key Features:
- Genuine Stihl OEM component for assured fit and compatibility
- Accurate airflow control for stable idle and consistent top‐end performance
- Durable, fuel‐resistant polymer construction for long service life
- Tight sealing edge to reduce air leaks and hunting/surging
- Smooth rotation on the throttle shaft for precise engine response
- Direct replacement for 4282 121 3300; no modifications needed
- Designed to work with the original shaft and fixing hardware
- Helps maintain efficient running and predictable fuel tuning
- Suitable for routine maintenance or repair to restore reliability
- Straightforward fitting with standard small‐engine service tools
Typical Applications:
Used during servicing or repair of Stihl backpack blowers to replace a worn, bent, or damaged throttle plate that causes poor idle, hesitation, or inconsistent speed control. Common in landscaping, grounds maintenance, facilities management, and domestic garden care where dependable blower performance is required throughout the working day.
Also known as:
Throttle plate, butterfly valve, carburettor butterfly, intake shutter, air flap, throttle disc, carb plate, intake valve plate. These terms describe the same rotating plate inside the carburettor that meters intake air to control engine speed and response.
Fits Models:
BR500, BR550, BR600, BR700
Alternate Part Numbers:
4282-121-3300, 42821213300
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