Briggs & Stratton Air Filter Chart: Your Ultimate Guide to Finding the Right Replacement for Your Engine​

2025-12-05

If you own a Briggs & Stratton engine—whether it powers your lawn mower, generator, pressure washer, or riding mower—you already know how critical routine maintenance is to keeping it running smoothly. Among the most overlooked yet vital components is the air filter. A clogged or ill-fitting air filter restricts airflow, forces your engine to work harder, reduces fuel efficiency, and can even lead to costly damage over time. This is where the Briggs & Stratton air filter chart comes in: a simple yet indispensable tool to ensure you select the exact replacement part your engine needs. In this guide, we’ll break down what the chart is, how to use it, why it matters, and everything else you need to know to keep your Briggs & Stratton engine performing at its best.

What Is the Briggs & Stratton Air Filter Chart?

The Briggs & Stratton air filter chart is a manufacturer-provided reference tool designed to help users identify the correct air filter for their specific engine model. Unlike generic filters that may fit loosely or fail to meet filtration standards, Briggs & Stratton’s chart aligns with its engine series (e.g., Intek, Vanguard, Quantum, OHV) and individual models to recommend filters that match exact dimensions, filtration efficiency, and operational requirements.

Think of it as a roadmap: instead of guessing which filter “might work,” the chart eliminates confusion by listing compatible part numbers, cross-references, and key specs for each engine. Whether you’re replacing a paper filter, foam pre-cleaner, or a dual-element design, the chart ensures you get the right fit—every time.

Why Does Your Engine Need the RightAir Filter?

Air filters might seem like small parts, but they play a massive role in your engine’s health. Here’s why using the correct filter (and referencing the chart) matters:

1. Protects Internal Components

Briggs & Stratton engines rely on clean air mixed with fuel for combustion. Dust, dirt, pollen, and debris in the air can scratch cylinder walls, wear down piston rings, or clog fuel injectors if not filtered out. The right filter traps these particles while allowing sufficient airflow—balancing protection with performance.

2. Maintains Fuel Efficiency

A dirty or incorrect filter forces the engine to draw harder for air, disrupting the air-fuel mixture. This can cause incomplete combustion, leading to wasted fuel and higher operating costs. Over time, this inefficiency adds up—using the chart prevents unnecessary expenses.

3. Extends Engine Lifespan

By preventing contaminants from entering critical components, the correct filter reduces friction, overheating, and premature wear. Briggs & Stratton engines are built to last, but only with proper care—including the right air filter.

4. Avoids Voiding Warranties

Using non-approved or incompatible filters could void your engine’s warranty. The chart ensures you stick to manufacturer-recommended parts, keeping your coverage intact.

How to Use the Briggs & Stratton Air Filter Chart: Step-by-Step

Using the chart is straightforward, but it requires knowing your engine’s details. Follow these steps to find the perfect filter:

Step 1: Identify Your Engine Model Number

Every Briggs & Stratton engine has a unique model number stamped on its casing, usually near the air filter housing, muffler, or on a metal tag. Look for alphanumeric codes like “125B777-0045-01” or “358777.” If the engine is older or the tag is worn, check your owner’s manual—most include the model number in the specifications section.

Step 2: Locate the Air Filter Chart

You can find the Briggs & Stratton air filter chart in three primary places:

  • Owner’s Manual: Most manuals include a dedicated section or appendix with filter cross-reference charts.

  • Briggs & Stratton Website: Visit their official support page (briggsandstratton.com/support) and search for your engine model. The site often provides downloadable charts or interactive tools.

  • Local Dealerships or Retailers: Stores like Home Depot, Lowe’s, or authorized Briggs & Stratton dealers carry printed charts or can look up your model using their inventory systems.

Step 3: Match Your Engine Model to the Chart

Charts are typically organized by engine series (e.g., “Intek Series,” “Vanguard Commercial Series”) or model ranges. Locate your engine’s series first, then find its specific model number within that section. The chart will list:

  • OEM Part Number: The original equipment manufacturer (OEM) part number for your filter.

  • Cross-Reference Numbers: Compatible aftermarket filters from brands like Fram, Purolator, or Briggs & Stratton’s own line (e.g., “12S662-0000” might cross-reference to “FRAM CA7405”).

  • Filter Type: Paper, foam, or dual-element (paper + foam).

  • Dimensions: Height, diameter, and depth to confirm physical fit.

  • Efficiency Rating: Micron size of particles trapped (e.g., 99% at 10 microns).

Step 4: Verify Compatibility with Your Environment

If you use your equipment in dusty conditions (e.g., construction sites, dry lawns), opt for a filter with a higher efficiency rating or consider upgrading to a foam pre-cleaner. The chart often includes notes on heavy-duty applications—use these to adjust your choice.

Common Briggs & Stratton Engine Series & Their Recommended Filters

To make this practical, let’s break down popular Briggs & Stratton engine series and their corresponding air filters. Note: Always confirm with the chart for your specific model, as variations exist.

1. Briggs & Stratton Intek Series

The Intek series powers many walk-behind mowers and compact tractors. These engines often use paper air filters​ with part numbers like:

  • OEM: 12S662-0000

  • Cross-Reference: Fram CA7405, Purolator L10060

  • Specs: 4.5” height x 4.25” diameter; traps 99% of particles >10 microns.

    Note: For dusty environments, pair with a foam pre-cleaner (part number 491638S).

2. Briggs & Stratton Vanguard Commercial Series

Designed for heavy-duty use (generators, zero-turn mowers), Vanguard engines demand robust filters. Look for:

  • OEM: 494638S

  • Cross-Reference: Fram CA8318, Wix 46134

  • Specs: Dual-element design (paper + foam); 99.5% efficiency at 5 microns.

    These filters have a deeper pleat structure to handle more debris.

3. Briggs & Stratton Quantum Series

Found in high-performance riding mowers and commercial equipment, Quantum engines use precision-engineered filters:

  • OEM: 795638S

  • Cross-Reference: Fram CA9817, Donaldson P550370

  • Specs: Synthetic media for longer life; resists moisture absorption.

4. Briggs & Stratton OHV (Overhead Valve) Series

Common in older push mowers, OHV engines often use simpler foam or paper filters:

  • OEM: 295638S (foam pre-cleaner)

  • Cross-Reference: Fram C5510, Napa 6601

  • Specs: Foam traps large particles; replace every 25 hours or seasonally.

Signs You Need to Replace Your Air Filter (Even If It’s Not Time Yet)

The chart tells you whichfilter to buy—but when should you replace it? Don’t wait for your scheduled maintenance interval. Watch for these red flags:

  • Visible Dirt/Debris: Hold the filter up to a light. If you can’t see light passing through, it’s clogged.

  • Reduced Engine Power: A dirty filter chokes airflow, making acceleration sluggish.

  • Black Smoke from Exhaust: Incomplete combustion due to restricted air causes black smoke.

  • Increased Fuel Consumption: Your engine works harder, burning more gas.

  • Hard Starting: The engine struggles to draw enough air to ignite the fuel mixture.

DIY: Replacing Your Briggs & Stratton Air Filter in 5 Minutes

Once you have the correct filter from the chart, replacing it is simple. Here’s how:

  1. Turn Off the Engine: Ensure the engine is cool and disconnected from power (for electric-start models).

  2. Locate the Air Filter Housing: It’s usually a black plastic box with clips or screws, near the top of the engine.

  3. Remove the Cover: Unclip or unscrew the housing. Some models have a rubber gasket—be gentle to avoid tearing.

  4. Take Out the Old Filter: Pull it straight out. Note the orientation (some filters have an arrow indicating airflow direction).

  5. Clean the Housing: Wipe out dust with a dry cloth or compressed air. Never use water.

  6. Install the New Filter: Align it with the housing grooves and press into place. Ensure the gasket (if present) sits flush.

  7. Reassemble the Housing: Snap or screw the cover back on. Test the engine—it should run smoother immediately.

Can You Use Aftermarket Filters? Are They Safe?

Many users wonder if third-party filters work as well as OEM parts. The short answer: yes—if they’re listed on the Briggs & Stratton chart.

Briggs & Stratton tests aftermarket filters from trusted brands (Fram, Purolator, etc.) to ensure they meet or exceed OEM specs. However, avoid no-name brands or filters not cross-referenced in the chart. These may have:

  • Incorrect dimensions, leading to poor fit and air leaks.

  • Lower-quality media that fails to trap small particles.

  • Thinner gaskets that don’t seal properly, letting unfiltered air in.

How Often Should You Replace Your Air Filter?

The general rule is every 25–50 hours of use, or at least once per mowing season. But this varies based on:

  • Environment: Dusty areas require monthly checks and more frequent replacements.

  • Engine Type: Commercial engines (Vanguard) need more frequent changes than residential models.

  • Usage: If you mow weekly vs. monthly, adjust accordingly.

Always use the chart to confirm your model’s recommended interval—some high-end engines specify 100-hour intervals with dual-element filters.

Final Tips for Maintaining Your Air Filter & Engine

  • Store Filters Properly: Keep spare filters in a dry, dust-free place. Moisture can damage the media.

  • Inspect Before Each Use: Take 30 seconds to check the filter before mowing or running your generator. Catching a clogged filter early prevents damage.

  • Don’t Clean and Reuse Disposable Filters: Paper filters aren’t designed for cleaning—replace them. Foam pre-cleaners can be washed with soap and water, dried, and re-oiled (if applicable).

Your Briggs & Stratton engine is an investment—protect it with the right air filter. By using the official air filter chart, you ensure optimal performance, save on fuel, and extend your engine’s life. Whether you’re a weekend gardener or a professional contractor, taking a few minutes to cross-reference your model number and select the correct filter pays off in the long run.

Now that you know how to use the chart, head to your garage, check your engine model, and grab the right filter—your engine will thank you.

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