STIHL Air Filter - 4241 140 4404

The STIHL 4241 140 4404 air filter provides direct-engineered particulate separation for STIHL two-stroke power equipment, preserving combustion efficiency and extending piston-cylinder service intervals by maintaining specified intake airflow resistance.

Key Features

• OEM manufacturer designation 4241 140 4404 for guaranteed dimensional accuracy
• Cylindrical polyurethane foam medium engineered for high-particulate outdoor operation
• Spiral-bound foam sealing ring prevents unfiltered air bypass around the filter edges
• Drop-in replacement for stock housing configurations requiring no additional hardware
• Preserves calibrated intake restriction values to maintain rated engine displacement and carburetor synchronization

Product Details

This element functions as a certified replacement intake screen for STIHL two-stroke engines. The multi-stage open-cell matrix traps abrasive dust and debris while maintaining static pressure within manufacturer thresholds. A rigid internal support sleeve prevents radial collapse under peak suction loads, ensuring consistent vaporized fuel mixing across the full throttle spectrum. The perimeter gasket interfaces directly with the aluminum or composite air box seal to eliminate external contaminant entry during idle and load cycles.

Compatibility

• Chainsaw Platforms: MS 170, MS 180, MS 181, MS 250, MS 251, MS 290, MS 291, MS 361
• Brushcutters & Line Trimmers: FS 55, FS 56, FS 70, FS 90, FS 91, FR 56
• Mulchers & Sweepers: KM 56, KM 90, SR 46
• Hedge Cutters & Lawn Equipment: HSE 40, HSE 70, HSA 65, HSA 80, RM 216, RM 238