The oil filter for a Briggs and Stratton CV40 engine is typically Briggs & Stratton part number 491056 (or its equivalent OEM replacement). This spin-on oil filter fits many small Briggs & Stratton gasoline engines and helps trap contaminants to keep the engine’s oil clean and running smoothly.

Briggs & Stratton oil filters like the 491056 are designed with a 3/4-inch UNF threaded base and standard sizing that fits many horizontal and vertical shaft engines, including models similar to the CV40. Using the correct filter ensures proper oil circulation and protects the engine from premature wear.

Always check your engine’s model, type, and code numbers (usually stamped on the engine) before buying a replacement filter. That way you can confirm the exact part number needed, as different variants may use another filter style or size.

What Oil Filter Does the Briggs and Stratton Cv40 Take?

Maintaining your Briggs & Stratton CV40 engine is key to its longevity and reliable performance. Whether it powers your trusty zero-turn mower, garden tractor, or another piece of outdoor power equipment, knowing the correct oil filter to use is a fundamental part of proper engine care. Using the right filter ensures optimal oil cleanliness, protects vital engine components, and helps your machine run smoothly for years to come.

In this comprehensive guide, we’re going to dive deep into everything you need to know about the oil filter for your Briggs & Stratton CV40. We’ll cover the official OEM recommendation, explore reliable aftermarket alternatives, provide a step-by-step guide on how to replace it, and share essential tips to keep your engine in top shape. By the end of this article, you’ll be an expert on CV40 oil filter selection and replacement, ready to tackle your engine maintenance with confidence.

Key Takeaways

• OEM Filter Recommendation: The primary oil filter for the Briggs & Stratton CV40 engine is the Briggs & Stratton Part Number 492932S. Always consider this as your first choice for guaranteed compatibility and performance.
• Understanding the “S” Suffix: The “S” in Briggs & Stratton part numbers often indicates a service part, specifically designed for maintenance and replacement, ensuring it meets original specifications.
• Reputable Aftermarket Alternatives Exist: While OEM is recommended, quality aftermarket filters from brands like Wix (e.g., 51050), Fram (e.g., PH6607), K&N (e.g., KN-153), and Baldwin (e.g., B7165) can be used, provided they meet or exceed OEM specifications.
• Key Aftermarket Filter Features: When choosing an aftermarket option, look for proper micron rating, a robust anti-drain back valve, and high-quality construction materials to protect your engine effectively.
• Regular Replacement is Crucial: Change your oil filter every 50-100 hours of operation or at least once a year, whichever comes first, to maintain optimal engine performance and prevent premature wear.
• Follow Proper Replacement Procedure: Always follow a safe, step-by-step process when replacing the oil filter, including lubricating the gasket and hand-tightening, to prevent leaks and ensure a secure fit.
• Proper Disposal is Essential: Never discard used oil and filters with household waste. Always take them to an authorized recycling center to protect the environment.

Quick Answers to Common Questions

What’s the difference between 492932 and 492932S?

The “S” suffix on Briggs & Stratton part numbers, like 492932S, typically designates it as a service part. This means it’s specifically intended for maintenance and replacement, ensuring it meets all the original specifications for optimal performance and fit in your Briggs & Stratton CV40 engine.

Can I use an automotive oil filter on my Briggs & Stratton CV40?

While some automotive filters might physically fit, it’s generally not recommended. Automotive filters are designed for different oil pressures, flow rates, and filtration requirements than small engine filters. Always use a filter specifically cross-referenced or designed for your Briggs & Stratton CV40 engine to ensure proper protection.

How often should I change the oil filter on my CV40?

For most Briggs & Stratton CV40 engines, the recommendation is to change the oil filter every 50 to 100 operating hours, or at least once per year, whichever comes first. If you operate your equipment in extremely dusty conditions or under heavy loads, more frequent changes might be beneficial.

Is it really necessary to lubricate the new oil filter gasket?

Yes, lubricating the rubber gasket on the new oil filter with a thin film of clean engine oil is a crucial step. It helps create a better seal, prevents the gasket from tearing or binding during installation, and makes the filter easier to remove during the next oil change.

What happens if I don’t change my oil filter regularly?

If you neglect to change your oil filter, it will eventually become clogged with contaminants. This can restrict oil flow to vital engine components, leading to increased friction, accelerated wear, reduced engine performance, and potentially severe engine damage over time. A clean filter is essential for a healthy Briggs & Stratton CV40.

Understanding Your Briggs & Stratton CV40 Engine

The Briggs & Stratton CV40 engine is a robust, V-twin overhead valve (OHV) power plant known for its reliability and power. These engines are commonly found in demanding applications like large lawn tractors and commercial-grade zero-turn mowers. Due to their heavy-duty usage, proper maintenance, especially oil and filter changes, is paramount.

The oil filter plays a critical role in the engine’s lubrication system. As engine oil circulates, it picks up contaminants such as dirt, metal shavings, and carbon deposits. The oil filter traps these harmful particles, preventing them from recirculating and causing wear and tear on sensitive engine parts like bearings, camshafts, and cylinder walls. A clean oil filter ensures a steady supply of clean oil, maintaining proper lubrication and cooling, which are vital for engine health.

The Essential Question: What Oil Filter Does the Briggs & Stratton CV40 Take?

Let’s get straight to the heart of the matter. For your Briggs & Stratton CV40 engine, there is a clear primary recommendation directly from the manufacturer.

The OEM Recommended Filter: Briggs & Stratton Part Number 492932S

The official Original Equipment Manufacturer (OEM) oil filter for most Briggs & Stratton V-twin engines, including the CV40, is **Briggs & Stratton Part Number 492932S**. This is the filter designed and engineered specifically for your engine, ensuring perfect fit, proper filtration specifications (like micron rating), and optimal oil flow. When you choose the OEM filter, you’re getting a product that meets Briggs & Stratton’s stringent quality standards, offering peace of mind and often preserving any remaining engine warranty.

Understanding the “S” Suffix

You might notice the “S” at the end of the part number (492932S). In Briggs & Stratton nomenclature, the “S” often indicates a service part. This means it’s specifically packaged and designated for maintenance and replacement, assuring you that it’s the correct item for servicing your engine.

Why OEM is Often Best

While there are many aftermarket options, choosing the OEM Briggs & Stratton CV40 oil filter offers several advantages:

• Guaranteed Compatibility: It’s designed to fit and function perfectly with your CV40 engine.
• Optimal Filtration: Engineered to the exact micron rating and flow rate specified by Briggs & Stratton for maximum protection.
• Quality Assurance: Manufactured to high standards, often providing superior internal components and gasket material.
• Warranty Protection: Using OEM parts can sometimes be a factor in maintaining your engine’s warranty.

Compatible Aftermarket Oil Filters for the CV40

While the Briggs & Stratton 492932S is the gold standard, many reputable aftermarket brands offer high-quality oil filters that are compatible with the CV40 engine. These can be a good option if you can’t find the OEM filter or prefer a specific brand. However, it’s crucial to choose wisely.

Cross-Referencing and What to Look For

Aftermarket filters are designed to “cross-reference” with OEM parts, meaning they are built to the same specifications for fit and function. When selecting an aftermarket Briggs & Stratton CV40 oil filter, pay attention to these key features:

• Micron Rating: This indicates the size of particles the filter can capture. Aim for a filter with a similar or better micron rating than the OEM (typically around 20-30 microns for engine oil filters).
• Anti-Drain Back Valve (ADBV): This valve prevents oil from draining out of the filter and oil galleries when the engine is shut off. A good ADBV ensures immediate oil pressure upon startup, reducing wear. Look for silicone or high-quality nitrile rubber for durability.
• Construction Quality: A sturdy metal housing, strong internal components, and a well-sealed filter media are signs of a good filter.
• Gasket Material: The gasket that seals the filter to the engine block should be made of durable, oil-resistant rubber to prevent leaks.

Popular Aftermarket Brands and Their Cross-References for the CV40

Here are some commonly available and respected aftermarket oil filters that cross-reference with the Briggs & Stratton 492932S for your CV40 engine:

• Wix Filters: A highly respected brand, Wix often offers excellent filtration. The Wix 51050 (or 57035 for a slightly longer version, if space allows) is a common cross-reference.
• Fram Filters: Widely available, the Fram PH6607 is a popular choice that fits the CV40.
• K&N Filters: Known for performance, K&N offers the KN-153, which is a high-quality option for your CV40.
• Baldwin Filters: Baldwin is another top-tier brand in filtration. The Baldwin B7165 is a suitable alternative.
• STP Filters: Commonly found in auto parts stores, the STP S6607 is an option.
• AMSOIL Filters: AMSOIL’s EAO filters (e.g., EAO15) are premium synthetic media filters offering extended service intervals, if that aligns with your oil change philosophy.

Always double-check the manufacturer’s cross-reference guide or consult with a reputable parts dealer to ensure the specific aftermarket filter you choose is indeed compatible with your Briggs & Stratton CV40 engine. Filter designs can sometimes vary subtly, and verifying fitment is crucial.

Step-by-Step Guide: How to Replace the Oil Filter on Your CV40

Changing your Briggs & Stratton CV40 oil filter is a straightforward maintenance task that most DIYers can accomplish. Follow these steps carefully to ensure a smooth and leak-free replacement.

Safety First!

Before you begin, always prioritize safety.

• Wear safety glasses to protect your eyes from splashes.
• Wear gloves to protect your hands from hot oil and chemicals.
• Ensure the engine is cool enough to touch but slightly warm (this helps oil drain better).
• Work in a well-ventilated area.
• Keep a fire extinguisher nearby, just in case.

Gather Your Tools and Supplies

Having everything ready beforehand makes the job much easier. You’ll need:

• New Briggs & Stratton CV40 oil filter (OEM 492932S or equivalent aftermarket).
• New engine oil (refer to your CV40 owner’s manual for the correct type and viscosity, e.g., Briggs & Stratton SAE 30 or 10W-30).
• Oil drain pan with adequate capacity.
• Oil filter wrench (strap wrench or cap-style wrench that fits your filter).
• Socket wrench and appropriate socket for the oil drain plug (if also changing oil).
• Clean rags or paper towels.
• Funnel for refilling oil.
• Torque wrench (optional, but recommended for drain plug).

Prepare the Engine

It’s generally a good idea to run the engine for 5-10 minutes before changing the oil and filter. This warms the oil, making it thinner and allowing it to drain more completely, carrying more contaminants with it. Once warm, shut the engine off and allow it to cool slightly so it’s not scalding hot.

Drain the Old Oil (Recommended)

While you can change just the filter, it’s highly recommended to change the oil at the same time.

1. Place your oil drain pan directly beneath the engine’s oil drain plug.
2. Using the appropriate socket wrench, carefully loosen and remove the oil drain plug. Be prepared for oil to flow out immediately.
3. Allow all the old oil to drain completely. This can take 5-15 minutes.
4. Once drained, clean the drain plug and its sealing washer (replace the washer if it looks damaged) and reinsert it. Tighten the drain plug securely, typically to around 15-20 ft-lbs, but always check your engine manual for the exact torque specification. Do not overtighten!

Locate the Oil Filter

On Briggs & Stratton CV40 engines, the spin-on oil filter is typically located on the side of the engine block, often near the bottom or middle, designed to be accessible. It looks like a small, cylindrical canister.

Remove the Old Oil Filter

1. Place your oil drain pan directly under the oil filter, as some residual oil will likely leak out when removed.
2. Use your oil filter wrench to loosen the old filter. Turn it counter-clockwise (“lefty loosey”). If it’s very tight, you might need some extra leverage.
3. Once loosened, you can usually unscrew it by hand. Be careful as it will be full of dirty oil.
4. Allow the oil from the filter and filter mounting area to drip into the pan.
5. Once completely removed, wipe down the filter mounting surface on the engine block with a clean rag, ensuring there’s no old gasket material stuck to it. This is crucial for a good seal with the new filter.

Prepare the New Oil Filter

This small but important step helps ensure a proper seal and prevents a dry start.

1. Open your new Briggs & Stratton CV40 oil filter.
2. Apply a thin film of clean new engine oil to the rubber gasket on the new filter. You can do this by dipping your finger in the new oil bottle and wiping it around the gasket.
3. (Optional but recommended): If the filter is designed to be installed vertically and filled, pour a small amount of new engine oil into the filter itself before installing. This helps pre-lube the filter and reduce the time it takes for oil pressure to build up on startup. Don’t overfill it if it installs horizontally, as it will just spill.

Install the New Oil Filter

1. Carefully thread the new, lubricated oil filter onto the engine block by hand. Turn it clockwise (“righty tighty”).
2. Make sure you don’t cross-thread it. It should spin on smoothly.
3. Once the gasket makes contact with the engine block, continue to tighten it by hand. The general rule is to tighten it 3/4 to 1 full turn after the gasket makes contact. Some manufacturers recommend 1/4 to 1/2 turn after contact. Always check the instructions printed on the new filter or in your engine manual. Do NOT use the filter wrench to tighten it down forcefully; hand-tightening is almost always sufficient and prevents damage or overtightening, which can make it impossible to remove next time.

Refill with Fresh Engine Oil

1. Locate your engine’s oil fill cap.
2. Place a clean funnel into the oil fill opening.
3. Pour the recommended type and amount of new engine oil into the engine. Consult your owner’s manual for the exact capacity (e.g., 1.5-2 quarts for many V-twin engines like the CV40).
4. Once filled, replace the oil fill cap securely.

Check for Leaks and Verify Oil Level

1. Start the engine and let it run for a minute or two. Keep an eye on the oil pressure warning light (if your engine has one) – it should go out quickly.
2. Immediately shut off the engine and carefully inspect the oil filter and drain plug area for any signs of leaks. Tighten slightly by hand if you see a small leak around the filter gasket.
3. After allowing the oil to settle for a few minutes, pull out the dipstick, wipe it clean, reinsert it fully, and then pull it out again to check the oil level.
4. The oil level should be between the “Add” and “Full” marks on the dipstick. Add more oil in small increments if needed, checking the level each time, until it reaches the “Full” mark. Do not overfill!

Dispose of Used Oil and Filter Properly

Used engine oil and filters are hazardous waste and must be disposed of responsibly. Most auto parts stores, service stations, and municipal recycling centers accept used oil and filters for free. Never pour them down drains or dispose of them with household trash.

Tips for Choosing and Maintaining Your CV40 Oil Filter

Beyond just knowing which filter to use, there are best practices that will extend the life of your Briggs & Stratton CV40 engine.

• Adhere to the Replacement Schedule: Your engine manual will specify the oil and filter change intervals, usually every 50-100 operating hours or at least once per year, whichever comes first. For heavy-duty use or dusty conditions, consider changing more frequently.
• Match Oil Type to Conditions: Always use the oil type and viscosity recommended by Briggs & Stratton for your specific operating temperatures and conditions. The filter works best when paired with the correct oil.
• Inspect the Old Filter: When you remove the old filter, take a moment to inspect it. If it’s crushed or severely corroded, it could indicate other engine issues. Cutting open an old filter (with a special tool) can reveal metallic debris, signaling potential internal engine wear.
• Keep Spare Filters Handy: It’s always a good idea to have a spare Briggs & Stratton CV40 oil filter on hand so you’re ready for your next maintenance cycle.
• Store Filters Properly: Keep new filters in their original packaging, in a clean, dry place, to prevent contamination before installation.

Troubleshooting Common Oil Filter Issues

Even with careful attention, sometimes minor issues can arise during or after an oil filter change.

Leaks After Replacement

If you notice oil leaking around the new filter after installation, here’s what to check:

• Gasket Not Lubricated: A dry gasket can bind and not seal properly.
• Old Gasket Still on Engine: Ensure the old gasket wasn’t stuck to the engine block when you removed the old filter. Two gaskets will cause a significant leak.
• Undertightened Filter: The filter may not be tight enough. Hand-tighten an additional quarter-turn, but avoid overtightening.
• Overtightened Filter: Believe it or not, overtightening can crush the gasket, causing it to fail. If you suspect this, remove the filter, inspect the gasket, replace the filter if necessary, and reinstall with proper torque.
• Damaged Filter Housing: In rare cases, the filter itself might be faulty. Replace it with a new one.

Difficulty Removing Old Filter

If the old oil filter is extremely stuck:

• Try a Different Wrench: A cap-style filter wrench sometimes provides better grip than a strap wrench, or vice versa.
• Penetrating Oil: Spray a little penetrating oil around the base of the filter where it meets the engine block. Let it soak for a few minutes.
• Puncture and Leverage (Last Resort): As a last resort, you can carefully drive a screwdriver through the filter body (close to the base, avoiding the center mount) to create a handle for leverage. Be extremely cautious, as this will spill oil and can be dangerous. Only do this if you have no other option.

Oil Pressure Warning Light Stays On After Change

If your engine’s oil pressure light remains illuminated after an oil and filter change:

• Check Oil Level Immediately: The most common cause is simply insufficient oil. Shut off the engine, let oil settle, and recheck the dipstick. Add oil if necessary.
• Incorrect Filter: A faulty or incorrect filter might be restricting oil flow. Ensure you installed the correct Briggs & Stratton CV40 oil filter.
• Air Bubble: Sometimes an air bubble can get trapped. Recheck the oil level, start the engine briefly, and then shut it off again to let the system equalize.
• Serious Engine Issue: If none of the above resolves the issue, it could indicate a more serious underlying engine problem. Stop running the engine and consult a qualified mechanic.

Conclusion

The oil filter might seem like a small component, but its role in the health and longevity of your Briggs & Stratton CV40 engine is enormous. By understanding that the **Briggs & Stratton Part Number 492932S** is your go-to OEM option, and knowing how to select quality aftermarket alternatives, you’re already well on your way to proactive maintenance. Following our detailed step-by-step replacement guide ensures a clean and efficient change, while our tips and troubleshooting advice help you avoid common pitfalls.

Regular maintenance, including timely oil and filter changes, is an investment in your equipment. It reduces wear, maintains performance, and saves you money on costly repairs down the road. So, arm yourself with the right knowledge and tools, and give your Briggs & Stratton CV40 the care it deserves. Your engine will thank you with years of reliable service!