Lonsda 394018 Air Filter for B&S & Vanguard Engines | John Deere LG394018JD Compatible (12.5-21 HP)

Overview

Keep your outdoor power equipment performing reliably with the Lonsda 394018 air filter. Designed for wide compatibility and solid filtration, this replacement part is a practical addition to regular maintenance, helping engines breathe easier and run smoothly through busy seasons.

What it fits and why it matters

This filter is listed as a replacement for several Briggs & Stratton codes (including 394018, 394018S, 392642, 5050H, 5050B, 4135) and also matches John Deere variant LG394018JD. For pre-filter compatibility, it aligns with B&S 271271 and 272490 families (including LG272490 and related codes). These cross-compatibilities bring flexibility when sourcing parts for mixed fleets of equipment.

• Compatible with horizontal L-Head twins and Vanguard OHV engines in the 12.5–21 HP range, covering a broad spectrum of mowers and power units.
• Supports both horizontal and vertical installations, simplifying maintenance across different machine layouts.

Protection and performance

The filtration system is designed to impede dust and debris from entering the intake, helping to maintain steady engine performance. The supplier notes that using this part may contribute to longer engine life by reducing contaminants, a potential benefit during regular service cycles.

• Improved air quality inside the intake chamber supports smoother operation and more consistent response.
• Durable filtration media and a robust build help resist wear over multiple replacements.

Why choose Lonsda

We back this air filter with reliable after-sales support and clear guidance for fitment. While it is not an original Briggs & Stratton part, the unit is designed to align with listed OEM codes and compatible engine families, offering a practical alternative for routine maintenance and part stocking.

Tip: Replacing air filters at regular intervals can be part of a broader maintenance routine, alongside other service tasks such as spark plug checks and pre-filter inspections.

Notes and real-world use

Not manufactured or authorized by Briggs & Stratton Corporation. Before purchase, verify compatibility with your exact model numbers to ensure a proper fit and seal.