Nerans 491588S-SET Air Filter Kit for Briggs & Stratton & Troy-Bilt Lawn Mowers

Introducing the Nerans 491588S-SET, a comprehensive air filtration and maintenance kit designed to fit a wide range of Briggs & Stratton and Troy-Bilt lawn mowers. This all-in-one solution combines essential filters, a spark plug, and adjustment springs to simplify upkeep and help your mower run smoothly across seasons. Whether you maintain a TB110, TB230, or a 725ex/675ex/625e/625-675 series machine, this kit is built to support clean air intake and reliable starts without overhauling your routine.

Compatibility and fit

The Nerans 491588S-SET is formulated to work with Briggs & Stratton 399959/491588S and a broad range of Troy-Bilt models, including TB110, TB230, TB210, and compatible 725ex/675ex/625e/625-675 series mowers. It also aligns with many common walk-behind and garden tractors, ensuring broad applicability for seasonal maintenance or mid-season refreshes.

What’s inside the all-in-one kit

• 1× air filter
• 2× pre filters
• 1× oil filter
• 1× fuel filter
• 1× spark plug
• A set of adjustment springs for the engine

Regular replacement of air and fuel filters, along with spark plug upgrades, helps preserve engine health and consistent starts. The included springs simplify timing adjustments during routine tune-ups, contributing to smoother operation over time.

Filtration performance and practical benefits

• 99% filtration efficiency with high-density multi-fiber media, designed for low flow resistance and strong dirt-holding capacity.
• Upgrading to this Nerans kit supports unclogged airflow, potentially helping the engine breathe easier during demanding mowing tasks.
• All-in-one convenience reduces the need to source parts separately, saving time during maintenance sessions.

Note: Benefits described here reflect the product design and kit composition. Real-world results may vary based on operating conditions, mower model, and maintenance practices.

Installation tips and maintenance notes

Before installing the kit, consult your mower’s user manual for model-specific guidance. Replace air and fuel filters on a schedule that aligns with your mowing load and environment. Pairing these parts with a fresh spark plug can support consistent starting and stable performance.