Arnold Baf-118 Air Filter With Pre-cleaner, Replaces Briggs & Stratton 394019

The Arnold BAF-118 is a replacement air filter with integrated foam pre-cleaner designed for small engines used in lawn mowers and outdoor power equipment. This oval-shaped filter replaces Briggs & Stratton part number 394019 and fits 12.5 to 20 HP twin cylinder L-head vertical shaft engines, including Series 402700 and 421700 models.

A quality air filter is essential for engine performance and longevity. This filter system works in two stages: the foam pre-cleaner wrap captures larger debris and dust particles before they reach the main filter element, while the paper filter media removes fine particles like pollen, dust, and smoke. By filtering out larger debris first, the pre-cleaner extends the life of the paper element and reduces clogging, which means longer intervals between replacements and lower maintenance costs. Cleaner intake air also helps your engine run smoother and more efficiently.

Features and Benefits

• Dual-Stage Filtration: The foam pre-cleaner wrap captures oversized debris, while the paper media filters fine particles, protecting your engine and extending filter life.
• Oval Paper Filter Media: High-efficiency paper element designed to match OEM specifications and deliver consistent airflow for optimal engine performance.
• OEM Replacement: Directly replaces Briggs & Stratton part 394019, with pre-cleaner wrap replacing Briggs & Stratton part 271271 for a perfect fit.
• Easy Installation: Tool-free replacement that installs quickly, making routine maintenance simple for homeowners and small equipment operators.
• Durable Construction: Built to withstand moisture and temperature changes throughout the season, ensuring reliable performance year after year.

Specifications

• Brand: Arnold
• Model: BAF-118
• Replaces: Briggs & Stratton 394019 (filter) and 271271 (pre-cleaner wrap)
• Filter Media: Paper with foam pre-cleaner wrap
• Horsepower Range: 12.5 to 20 HP
• Engine Type: Twin cylinder L-head vertical shaft
• Fits Series: 402700, 421700