Genuine Vanguard / Briggs & Stratton OEM part: 821136 – an inner air filter cartridge designed to provide high-efficiency intake filtration for select engines using a canister (Donaldson-style) air cleaner system. This cyclonic-style, pleated media cartridge helps protect your engine from dust ingestion, supporting reliable performance and longer service life.
Key Benefits
- OEM fit & performance: Genuine part built to Briggs & Stratton/Vanguard specification for correct sealing and airflow.
- Superior engine protection: Cyclonic-style, pleated filter media helps reduce harmful dirt ingestion.
- Ideal for maintenance servicing: Helps restore proper airflow, reducing power loss caused by clogged filters.
Fitment & Compatibility
This is the inner air filter/cleaner element used on selected Big Block V‑Twin Vanguard and other specified Briggs & Stratton engine variants (including Donaldson-based air cleaner systems). Common model families include variants such as 356447, 49E777/49E877/49R977/49V677, 540477/541477/541777/542477/542777/543477/543577/543777, and 610177/611177/611475/611477/612177/613177/613477/613777 (selection varies by type code).
Pairs with outer filter: Typically used with outer air filter/cleaner 841497. Also listed as replacing 841238 (check your engine parts list to confirm).
Not sure it fits? Send us your engine Model / Type / Code and we’ll confirm compatibility before you order.
Specifications (Approx.)
| OEM Part Number | 821136 |
|---|---|
| Filter Type | Inner air filter cartridge (cyclonic-style, pleated media) |
| Length | 260 mm |
| Outside Diameter | 59 mm |
| Inside Diameter | 45 mm |
| Approx. Shipping Weight | 210 g |
What’s in the Box
- 1 × Genuine Vanguard / Briggs & Stratton inner air filter cartridge (821136)
Installation & Service Tips
- Replace at the interval recommended in your engine/equipment service schedule, or sooner in dusty environments.
- If your system uses an outer element (e.g., 841497), inspect/replace both to restore full filtration performance.
- Ensure the sealing surfaces are clean and the cartridge is correctly seated to prevent unfiltered air bypass.
Why buy from Mitchell Powersystems? Fast UK dispatch, knowledgeable parts support, and genuine OEM supply for Vanguard applications.