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Briggs & Stratton 491588S Flat Air Filter Cartridge - Individual / White - Garden Equipment Spare Parts

Briggs & Stratton 491588S Flat Air Filter Cartridge

SKU 491588S
By: Briggs and Stratton
$24.00 - $58.56
$24.00
$24.00 - $58.56
$24.00
Availability: This product will be delivered in 3-5 business days
Availability: This product will be delivered in 3-5 business days
Size: Individual
Colour: White

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Delivery Notice:

Please allow 3-5 business days for processing before it's ready for delivery or pickup. All standard delivery options still apply.

Delivery Notice:

Please allow 3-5 business days for processing before it's ready for delivery or pickup. All standard delivery options still apply.

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Product Description

Briggs & Stratton Flat Air Filter Cartridge (491588S) – OEM Part

Shield your lawn mower's engine from the catastrophic effects of dirt ingestion with the Genuine Briggs & Stratton Flat Air Filter Cartridge (491588S). Acting as the critical barrier between your engine's carburetor and the harsh, dusty outdoor environment, this premium pleated paper lawn mower filter provides vastly superior filtration compared to basic foam inserts. By blocking microscopic dust, sand, and abrasive grass clippings from entering the combustion chamber, this essential small engine filtration cartridge prevents scoring on the cylinder walls, ensuring your equipment maintains peak compression and runs flawlessly for years.

Attempting to save a few dollars with cheap aftermarket filters often leads to severe engine failure. This authentic OEM part (also replacing part number 4101) is engineered to absolute factory specifications, guaranteeing a flawless, airtight seal within the filter housing. It is the universally trusted quantum engine air cleaner replacement for a massive array of Briggs & Stratton powerplants, including the highly popular 3.5 to 6.5 HP Quantum engines, as well as the 625, 675, 625e, 675e, and 725e series. Whether you are prepping for the spring mowing season or undertaking commercial push mower maintenance, using genuine B&S replacement parts is the only way to ensure proper fit and maximum performance.

Who Is This Air Filter Cartridge Ideal For?

The Briggs & Stratton 491588S filter delivers uncompromising engine protection. It is highly recommended for:

  • Residential Homeowners: Performing easy, DIY seasonal maintenance on their push mowers to ensure reliable, first-pull starting every weekend.
  • Professional Landscapers: Securing the longevity of their commercial lawn care fleets by keeping fine, abrasive dust out of their engines during heavy, dry summer mowing.
  • Small Engine Mechanics: Sourcing high-turnover, reliable, genuine OEM parts for fast and professional customer repairs.
  • Agricultural Workers: Maintaining robust small-engine equipment operating in highly dusty, demanding farming environments.

Key Features and Performance Benefits:

  • Advanced Pleated Paper Design: Creates a massive surface area that traps far more microscopic dirt and debris than standard flat foam filters.
  • Genuine OEM Precision: Manufactured by Briggs & Stratton to guarantee an exact, airtight fit, preventing harmful dust from bypassing the filter edges.
  • Optimizes Engine Performance: A clean filter restores proper airflow to the carburetor, improving fuel efficiency, reducing emissions, and restoring lost engine power.
  • Protects Engine Internals: Prevents 'dirt ingestion,' which acts like liquid sandpaper inside the engine, saving you from complete engine rebuilds.
  • Extensive Compatibility: Specifically designed to fit highly common 3.5 to 6.5 HP Quantum engines and the modern 625 to 725e series.

Technical Specifications:

  • Brand: Briggs & Stratton (Genuine OEM Part)
  • Part Number: 491588S (Also known as Briggs & Stratton 4101)
  • Filter Style: Flat Panel, Pleated-Paper Cartridge
  • Country of Origin: China (Manufactured to B&S Factory Standards)
  • Engine Compatibility: Select 3.5-6.5 HP Quantum Engines, 625-675 Series, 625e, 675e, 725e Series, and 625-1575 Series.

Demand genuine protection for your Briggs & Stratton engine. Available for nationwide delivery.

Delivery Information

Dispatch: Items marked as “In stock” or “Ready to be shipped” are usually dispatched within 1 business day after payment is received. If an item is not in stock and ordered from our supplier, please allow 3–5 business days for processing before it is ready for delivery or pickup. All standard delivery options still apply.

Shipping: Delivery costs are calculated at checkout based on your location and order size. Bulky items and chemicals may attract additional freight charges and cannot be sent to PO Boxes.

Delivery: Parcels are delivered by road freight. Authority to leave may be used if no one is available to receive the order. For full details, please see our Shipping & Delivery Policy

Business days to delivery

NSW
City 1 Day
VIC
Melbourne 1 Day
Regional 3–4 Days
QUEENSLAND
Brisbane 1–2 Days
Regional 3–4 Days
SOUTH AUSTRALIA
Adelaide 2–3 Days
Regional 4–5 Days
NORTHERN TERRITORY
All Areas 4–6 Days
WESTERN AUSTRALIA
All Areas 4–6 Days
TASMANIA
All Areas 4–6 Days
Frequently Asked Questions
Why is a pleated paper filter better than a foam filter?

Pleated paper filters offer a vastly larger surface area compacted into a small space. This allows them to trap significantly finer microscopic dust particles without restricting the engine's required airflow, providing superior protection.

Can I wash and reuse this paper filter?

No. Unlike foam filters, pleated paper cartridges cannot be washed with water or solvents, as the liquid will destroy the paper fibers and ruin the filter. When a paper filter becomes heavily soiled, it must be completely replaced.

How often should I change this air filter cartridge?

For optimal engine health, Briggs & Stratton recommends replacing the paper air filter once a season, or every 25 hours of operation. If you mow in very dry, dusty conditions, you should check and replace it more frequently.

How do I know if my filter needs replacing?

If the paper pleats look heavily blackened, caked with dirt, or clogged with grass clippings, it's time for a replacement. A clogged filter will cause the engine to sputter, lose power, use excess fuel, and produce black smoke.

Can I clean the filter by blowing compressed air through it?

It is not recommended. High-pressure compressed air can easily tear microscopic holes in the delicate paper pleats. While it might look clean, those invisible tears will allow abrasive dust directly into your engine.

Will this filter fit my Quantum 5.0 HP engine?

Yes. The 491588S filter is the standard exact-fit replacement for the vast majority of Briggs & Stratton Quantum engines ranging from 3.5 to 6.5 Horsepower.

Does this replace the Briggs & Stratton part number 4101?

Yes. Part number 491588S and 4101 are identical filters. Briggs & Stratton frequently uses both numbers interchangeably for retail and bulk packaging of this exact flat panel cartridge.

Why should I buy a genuine OEM filter instead of a cheap aftermarket one?

Genuine Briggs & Stratton filters are guaranteed to fit perfectly. Cheap aftermarket filters are often slightly undersized or feature poor rubber gaskets, allowing dirty air to bypass the filter entirely, which will rapidly destroy the engine's piston rings.

Do I need to oil this paper filter?

No! Pleated paper filters must remain completely dry. Oiling a paper filter will instantly clog the pores, choke the engine of air, and prevent the mower from starting.

Does my filter also need a foam pre-cleaner?

Some engine models utilize a foam 'pre-cleaner' that sits on top of this paper cartridge to catch large grass clippings. If your mower has one, you should clean and re-oil the foam pre-cleaner when you replace this paper cartridge.

How do I install the new filter?

Installation takes seconds. Simply unscrew or unclip the plastic air filter cover on the side of your engine, pull the old flat panel out, drop the new 491588S filter in (ensure the rubber seal sits flat), and snap the cover back on.

Do you offer trade pricing for lawn care professionals?

Yes, Freshway Supplies provides competitive volume pricing for professional landscapers, lawn care businesses, and small engine repair mechanics. Contact us to establish your trade account.

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