[Lifetime Warranty] FS 91 R Trimmer Carburetor Kit - Compatible with STIHL FS91R FS91 FC91 FS111 FC111 KM91R KM111R HT102 FC96 Trimmer Brushcutter 4180-120-0615 Carb

FS 91 R 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 (OEM) 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 0615
• 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.