laffoonparts FS91 FS 91R Air Filter Tune Up Kit for STIHL KM91R KM131 FS89 FS91 FS111 FS131 FC96 – 4180-141-0300

Refresh your STIHL trimmer with a complete air filter tune up kit

The laffoonparts FS91 FS 91R Air Filter Tune Up Kit is built to refresh the air intake on a range of STIHL models. Featuring the OEM replacement number 4180-141-0300, this kit provides a ready-to-install set designed for straightforward maintenance. Instead of a single part, it bundles multiple components to simplify routine service and help you keep your equipment in productive shape.

Whether you’re picking up the tools after storage or preparing for a busy season, this kit offers a practical option for keeping the engine breathing clean air. It combines thoughtfully selected parts to support typical maintenance cycles without disrupting your workflow. The emphasis here is on reliable replacement parts and a tidy upgrade path for compatible STIHL machines.

Included in the kit

• 2 x air filters for quick swaps and extended service life
• 1 x fuel filter to help maintain steady fuel delivery
• 1 x fuel line for secure fuel flow
• 1 x spark plug for reliable ignition
• 2 x primer bulbs to facilitate easy priming

Compatibility and fitment

• Replacement for STIHL KM91R, KM111R, KM131, KM131R, BT131, HT102, HT103, HT132, HT133
• Replacement for STIHL FS89, FS89R, FS91, FS91R, FS111, FS111R, FS111RX, FS131, FS131R, FS311
• Also suitable for FR131T, FC96, FC111 series and related models

Air filter size: 3" L × 2-3/4" W × 7/8" H. This dimension helps you quickly verify a fit for compatible housings and ensures a snug replacement that supports proper sealing.

What you can expect in practice

With a complete kit on hand, you’ll have a straightforward path to refreshing worn components. While outcomes depend on usage, you may notice easier-starting behavior, improved intake filtration, and fewer interruptions caused by degraded filters. The kit’s bundled components are designed to work together, reducing downtime and simplifying maintenance routines.

For best results, follow standard service practices: replace the air filter when the engine’s breathing appears hindered, inspect the fuel line for wear, and replace the spark plug as part of regular upkeep. The kit’s parts are chosen to cover common wear points, offering a practical upgrade for many STIHL trimmers and similar tools.

Why choose laffoonparts

laffoonparts focuses on practical, component-level refreshes that support everyday tool use. This kit presents a cohesive set of commonly replaced parts, giving you a convenient option to maintain your equipment without hunting for individual pieces. It’s designed to align with legitimate STIHL replacement reference numbers and common service scenarios, helping you plan maintenance with confidence.