Carburetor choke knob compatible with STIHL BR500 BR550 BR600 backpack blowers. Direct replacement for part numbers 4282, 182, and 9500. Designed to restore precise choke control for reliable starting and smooth operation. Key benefits Restores proper choke function for easier cold starts and consistent idle behavior. Durable construction for long service life under regular use. Direct fit replacement for the listed part numbers for quick swap and minimal downtime. Simple installation that requires basic tools and no carburetor disassembly. Features and attributes Function: Choke knob to control carburetor choke position for starting and warm up. Compatibility: Made for BR500, BR550, and BR600 backpack blower models; replaces MPN 4282, 182, and 9500. Material and build: Constructed from durable materials to withstand repeated use and outdoor conditions. Performance: Provides reliable, repeatable choke adjustment for consistent engine starts. Practical use scenarios Field : a cracked or worn knob on a job site to restore choke control and avoid delays. Routine maintenance: Keep as a spare part during seasonal service to ensure dependable starting when needed. Equipment refurbishment: Use when rebuilding or refurbishing a blower to controls to factory style operation. What you get A single, ready to install carburetor choke knob that fits the specified blower models and replaces the listed part numbers. Easy to install, durable in service, and designed to bring back precise choke control without fuss.