Cross-reference Chart: Briggs & Stratton Oil Filters At A Glance
- 01. How Briggs & Stratton oil filters are numbered
- 02. Sample Briggs & Stratton cross-reference chart
- 03. Step-by-step: How to cross-reference your filter
- 04. Why cross-referencing matters for Briggs & Stratton engines
- 05. Commonly confused Briggs & Stratton filters
- 06. Best practices for DIY and professional use
Many Briggs & Stratton engines use one of roughly a dozen common oil filter part numbers-such as 492932, 491056, 842921, and B1-so you can "cross reference" them to compatible aftermarket filters made by brands like FRAM, Wix, NAPA, and K&N. Below is a practical, structured guide that mirrors a true oil filter cross-reference chart you might use in a repair shop or parts counter.
How Briggs & Stratton oil filters are numbered
Most Briggs & Stratton oil filters are identified by a four- or five-digit OEM part number stamped on the filter or listed in the service manual. Common examples include 492932 (short canister), 491056 (tall canister), 842921 (spin-on for many "big block" engines), and B1 (older small-frame style).
Each of these numbers maps to a specific outer diameter, thread size, and height so the filter will thread correctly onto the engine block adapter and fit under the shroud. Because Briggs & Stratton often licenses the same canister design to other brands, dozens of "cross-reference" numbers from FRAM, Wix, and others can be used once you match the correct filter footprint.
Sample Briggs & Stratton cross-reference chart
The table below shows example equivalents for four of the most common Briggs & Stratton oil filter numbers. These are typical industry matches, but always verify dimensions and micron rating before installation.
| Briggs & Stratton OEM | Alternate FRAM | Alternate Wix | Alternate NAPA | Notes (approx.) |
|---|---|---|---|---|
| 492932 (short) | PH3614, PH8170 | 51056, 57035 | 1056, 1056MP | Short canister; 3/4-16 thread; under-shroud fit on small air-cooled engines. |
| 491056 (tall) | HP7, PH3614, PH9342 | 51215, 51391, 51785 | - | 14-20 hp Magnum-style; often replaces some Kohler 52-050-02 filters. |
| 842921 (spin-on) | PH8170 | 57035, 51056 | 1056, 7035 | Common on Vanguard and twin-cylinder engines; roughly 3.4 in tall, 2.9 in OD. |
| B1 (older style) | PH2835 | - | - | Basic element for older small-frame engines; often seen in garden and lawn equipment. |
Exact counts vary by source, but one major cross-reference site lists more than 50 aftermarket filters that can substitute for a single Briggs & Stratton 492932 alone, emphasizing the importance of matching thread pitch and height, not just part number. Independent shops often keep a laminated oil filter cross-reference chart like this on the parts counter to speed up identifications for common mowers, tillers, and generators.
Step-by-step: How to cross-reference your filter
When you're holding a dirty or corporate-branded filter and need to match it to a Briggs & Stratton OEM number, follow this standard procedure used by parts departments and service centers.
- Remove the old filter and wipe the end cap clean so any stamped numbers are legible; common OEMs include 492932, 491056, 842921, and B1.
- Measure the outer diameter, overall height, and thread size (e.g., 3/4-16) with calipers or a tape measure to confirm the physical envelope.
- Enter the Briggs & Stratton OEM into an online cross-reference tool or printed cross-reference chart to see FRAM, Wix, NAPA, and other equivalents.
- Check that the replacement filter's micron rating (often 25-40 microns for Briggs & Stratton engines) matches your engine's recommendation.
- Verify the filter still clears nearby components (air shroud, frame, fuel line) before torquing to the engine's spec (typically 15-25 ft-lb, depending on model).
Some technicians report that misaligned cross-reference matches cause 10-15% of premature oil-filter failures they see in small-engine shops, either because the seal leaks or the canister binds against the shroud. Cross-checking both the OEM number and the thread specification on the first step reduces this risk significantly.
Why cross-referencing matters for Briggs & Stratton engines
Unlike many auto manufacturers that only support their own branded filters, Briggs & Stratton engines are routinely serviced with FRAM, Wix, and NAPA filters, especially in rental yards and landscaping fleets. A concise oil filter cross-reference chart lets technicians and owners swap between brands without plumbing changes or adapters.
FRAM and Wix have been cross-referencing to Briggs & Stratton OEMs since at least the early 2000s, when the 492932 and 491056 designs became standard on many 14-20 hp lawn-tractor engines. Today, large parts distributors report that over 70% of Briggs & Stratton oil-filter sales in the DIY segment are actually aftermarket FRAM or Wix units mapped to the Briggs OEM via a cross-reference table.
Commonly confused Briggs & Stratton filters
Two of the most frequently mixed-up types are the "short" 492932 and the "tall" 491056, which share the same 3/4-16 thread but differ in height and canister volume. Using the short 492932 in a spot designed for 491056 can lead to sump-area interference or reduced oil capacity, while the reverse may cause the shroud to bind against the taller canister.
Another area of confusion is the 842921 "spin-on" style, which is often listed as compatible with several FRAM PH-series numbers and Wix 57000-series filters. Service manuals from 2012-2018 for key Vanguard and twin-cylinder engines specifically call out 842921 as the OEM spin-on, but note that some older service bulletins allowed 491056 in certain applications, so cross-referencing must respect the model year.
Best practices for DIY and professional use
- Always match the Briggs & Stratton OEM first: write down 492932, 491056, 842921, or B1 before looking at any aftermarket catalog.
- Use a printed or digital oil filter cross-reference chart from a reputable source (e.g., FRAM, Wix, or an independent cross-reference database) rather than relying on memory alone.
- Double-check the thread size and height; even a 0.25-inch difference can prevent the air shroud from reinstalling properly on many residential mowers.
- Consider the micron rating; some high-performance FRAM or Wix variants may be rated lower than the original Briggs & Stratton specification, which can accelerate wear in heavy-duty applications.
- Re-check torque after the first oil change with a new brand; loose filters were cited in roughly 8% of oil-leak complaints logged by a 2023 survey of small-engine shops.
Professional fleet managers often keep a one-page Briggs & Stratton oil filter cross-reference chart inside each service truck, listing the four most common OEMs (492932, 491056, 842921, B1) alongside their top three FRAM and Wix equivalents. This reduces part-lookup time and cuts the risk of ordering the wrong filter canister for a mixed fleet of mowers, generators, and pressure washers.
Everything you need to know about Cross Reference Chart Briggs Stratton Oil Filters At A Glance
Which Briggs & Stratton oil filter is the most common?
Across residential lawn equipment built between 2005 and 2020, the Briggs & Stratton 492932 short canister is widely regarded as the most common OEM oil filter, appearing on hundreds of 9-14 hp walk-behind and small riding mowers. It is often replaced with FRAM PH3614 or PH8170 and Wix 51056 or 57035, which are also top sellers in the DIY segment.
Can I use any FRAM or Wix filter that "cross-refers" to Briggs & Stratton?
No; you must confirm that the cross-referred filter specification matches your specific engine model, year, and shroud clearance, not just the OEM number. Some FRAM or Wix variants may have different gasket compounds or height tolerances that work in an auto engine but can bind on a tightly shrouded Briggs & Stratton engine.
What happens if I use the wrong cross-referred oil filter?
Using an incorrect cross-referred oil filter can lead to oil leaks, inadequate oil capacity, or mechanical interference with the air shroud or frame on Briggs & Stratton engines. In a 2022 field survey, roughly 12% of oil-related service calls on small engines involved improperly sized or mis-cross-referenced filters rather than normal wear.
Is there a free online Briggs & Stratton oil filter cross-reference tool?
Yes; several independent parts databases and filter manufacturers offer free online tools where you can enter a Briggs & Stratton OEM such as 492932 or 491056 and see a list of FRAM, Wix, NAPA, and other cross-reference numbers. These tools are typically updated quarterly and may list dozens of aftermarket equivalents for each Briggs & Stratton OEM number.