OEM Air Filter — Part #821136
Genuine Engine Air Cleaner Replacement
Briggs & Stratton 821136 — Air Filter / Air Cleaner
Also known as: Engine Air Cleaner, Filter-A/C, Small Engine Air Filter
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Specifications
| Specification |
Detail |
| Part Number |
821136 |
| Brand |
Briggs & Stratton |
| Part Type |
Air Filter / Air Cleaner (Filter-A/C) |
| OEM / Aftermarket |
Genuine OEM |
| Application |
Briggs & Stratton Small Engines |
| Quantity |
1 per package |
The Briggs & Stratton 821136 is a genuine OEM air filter — also referred to as an air cleaner, Filter-A/C, or engine air cleaner element — designed to remove airborne dust, debris, and contaminants before they reach the carburetor and internal engine components. This filter is used in a range of Briggs & Stratton powered equipment including walk-behind lawn mowers, riding mowers, and outdoor power tools. Regular replacement of the 821136 air filter is essential for maintaining proper air-fuel mixture, fuel efficiency, and engine longevity.
Key Features▼
Genuine OEM Briggs & Stratton Part
Part number 821136 is a factory-original Briggs & Stratton air filter, manufactured to exact OEM tolerances. Using genuine parts ensures correct fitment and avoids compatibility issues that can arise with aftermarket alternatives.
Small Engine Air Filtration and Protection
The 821136 filter captures dust, grass clippings, and fine particulates before they enter the carburetor. This protects internal engine surfaces and maintains consistent airflow for a clean air-fuel mixture and reliable starting.
Cross-Reference and OEM Part Lookup
This listing is for the genuine Briggs & Stratton replacement air filter 821136. Always verify your engine model number before ordering to confirm compatibility. This part may also be referenced as Filter-A/C or air cleaner element in service manuals.
Lawn Mower and Outdoor Power Equipment Fitment
Designed for use in Briggs & Stratton powered outdoor power equipment, including walk-behind and riding mowers. Replacing air filter 821136 at the recommended service interval helps extend engine life and improve fuel economy.
Compatible Equipment▼
The Briggs & Stratton 821136 air filter is designed to fit select Briggs & Stratton small engines found in a variety of outdoor power equipment. Always confirm your engine model and type before installation to ensure the 821136 is the correct filter for your application.
Equipment powered by compatible Briggs & Stratton engine series — including walk-behind lawn mowers, push mowers, riding mowers, and other outdoor power tools — may use the 821136 air cleaner filter. Verify your engine's service parts list for part number 821136 confirmation.
- Briggs & Stratton powered walk-behind lawn mowers
- Briggs & Stratton powered push mowers
- Briggs & Stratton powered riding lawn mowers
- Select Briggs & Stratton small engine applications
- Outdoor power equipment with compatible Briggs & Stratton engine series
Common Questions▼
Q: What does Briggs & Stratton part 821136 fit?
A: The 821136 is a Briggs & Stratton OEM air filter designed for compatible small engines used in lawn mowers and other outdoor power equipment. We recommend confirming your specific engine model number against the Briggs & Stratton parts lookup to verify fitment before ordering.
Q: How often should I replace the Briggs & Stratton 821136 air filter?
A: Briggs & Stratton generally recommends inspecting the air filter every 25 hours of operation and replacing it every season or every 100 hours, whichever comes first. Operating in dusty or dirty conditions may require more frequent replacement of the 821136 air cleaner.
Q: Is the 821136 a genuine OEM Briggs & Stratton air cleaner or aftermarket?
A: This listing is for the genuine OEM Briggs & Stratton 821136 air filter, manufactured to original factory specifications. Genuine OEM parts provide the best assurance of correct fitment, filtration performance, and engine protection compared to aftermarket alternatives.
Q: What are the symptoms of a clogged or dirty lawn mower air filter?
A: Common signs of a dirty or failing air filter include hard starting, rough idling, reduced engine power, excessive fuel consumption, and black smoke from the exhaust. Replacing the Briggs & Stratton 821136 air filter at the recommended interval helps prevent these issues.
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