4180-120-0615 FS91R Trimmer Carburetor Kit - Fits STIHL FS91R FS91 FC91 FS111 Trimmer

4180-120-0615 FS91R Trimmer Carburetor Kit - Fits STIHL FS91R FS91 FC91 FS111 Trimmer4180 120 0615 FS91R Trimmer Carburetor Kit Key Features Complete replacement kit includes carburetor, air filter, fuel filter, fuel lines, grommet, primer bulb, and spark plug. Designed as a direct fit replacement for the original equipment manufacturer part. Pre calibrated from the factory; minor adjustments may be necessary for optimal performance based on altitude and fuel mixture. Replaces Cross Reference Part Numbers 4180 120 0615 4180 120 0618

4180-120-0615 FS91R Trimmer Carburetor Kit

Key Features

• Complete replacement kit includes carburetor, air filter, fuel filter, fuel lines, grommet, primer bulb, and spark plug.
• Designed as a direct-fit replacement for the original equipment manufacturer part.
• Pre-calibrated from the factory; minor adjustments may be necessary for optimal performance based on altitude and fuel mixture.

Replaces / Cross-Reference Part Numbers

• 4180-120-0615
• 4180-120-0618
• 4180-120-0611
• C1Q-S174
• 41801200615

Compatibility & Fitment

• STIHL Trimmers / Brushcutters: FS89, FS89R, FS91, FS91R, FS111, FS111R, FS111RX
• STIHL Edgers: FC91, FC96, FC111
• STIHL Kombi Engines: KM91, KM91R, KM111, KM111R
• STIHL Pole Pruners: HT102, HT103

When to Replace

• Engine fails to start or experiences difficult starting.
• Engine stalls frequently, idles roughly, or will not hold an idle.
• Noticeable loss of power or poor acceleration during operation.
• Fuel leaks from the carburetor body.
• Excessive black smoke emitted from the exhaust.

Installation Tips

• Verify compatibility with your specific model number before starting installation.
• Drain all fuel from the tank before servicing the fuel system.
• Document the routing of fuel lines and throttle linkage with photos before disassembly.
• It is recommended to replace the fuel filter and fuel lines when installing a new carburetor.
• After installation, check for fuel leaks and start the engine. Adjust idle and fuel mixture screws as needed for smooth operation.