What Oil Filter Does the Briggs and Stratton CV40 Take?

Introduction

Maintaining your Briggs and Stratton CV40 engine is essential for ensuring its longevity and peak performance, especially if you rely on it for heavy-duty tasks like powering a riding lawn mower. One critical maintenance task is replacing the oil filter, which keeps the engine’s oil clean and free of contaminants. Choosing the correct oil filter is vital to avoid performance issues or potential engine damage. In this comprehensive guide, we’ll identify the specific oil filter for the CV40, provide installation instructions, and share maintenance tips to keep your engine running smoothly. Whether you’re a homeowner or a professional, this article is designed to help you make informed decisions about your CV40 engine care.

Understanding the Briggs and Stratton CV40 Engine

The Briggs and Stratton CV40 is a robust V-twin engine, likely part of the Intek series, commonly used in riding lawn mowers and other outdoor power equipment. With an estimated displacement of around 724 cc and a power output of 20-25 horsepower, the CV40 is designed for demanding applications. Its full-pressure lubrication system requires a spin-on oil filter to maintain clean oil and proper lubrication. The engine features overhead valves (OHV), a durable cast-iron cylinder sleeve, and advanced air filtration, making it a reliable choice for large lawns and tough terrains. Understanding these specifications helps clarify why the correct oil filter is essential for this engine.

Importance of Using the Correct Oil Filter

The oil filter plays a pivotal role in protecting your CV40 engine. It removes harmful contaminants like dirt, metal particles, and debris from the engine oil, ensuring smooth operation and reducing wear on critical components like the crankshaft and bearings. Using an incorrect filter can lead to inadequate filtration, reduced oil pressure, or leaks, which may cause significant engine damage over time. For a pressure-lubricated V-twin engine like the CV40, the oil filter must meet specific design standards to handle high oil flow and pressure. Additionally, using a genuine Briggs and Stratton filter ensures compliance with emission regulations and maintains your engine’s warranty.

Specifications of the CV40 Engine Related to Oil Filters

The CV40 engine’s full-pressure lubrication system relies on a spin-on oil filter, which is easy to install and provides efficient filtration. The engine typically holds 20-24 ounces of oil, depending on the specific model, and uses SAE 30 oil for optimal performance in temperatures above 40°F (4°C). Briggs and Stratton recommends changing the oil filter annually or every 100 hours of operation, whichever comes first. The filter must be compatible with the engine’s high-pressure oil system, designed to handle the demands of a V-twin configuration. These specifications guide the selection of the appropriate oil filter for the CV40.

Recommended Oil Filter for the CV40

Based on available information, the recommended oil filter for the Briggs and Stratton CV40 is the 492932S (Briggs & Stratton 492932S). This genuine OEM filter is designed for pressure-lubricated engines, including most Intek and Vanguard OHV engines, and is likely compatible with the CV40, which appears to be a Model 40 V-twin in the Intek series. The 492932S is a spin-on filter with a height of 2-1/4 inches, ensuring a perfect fit and reliable performance. It effectively removes contaminants, maintains oil pressure, and complies with EPA emission standards.

Key Features of the 492932S Oil Filter

• Compatibility: Fits most Briggs and Stratton pressure-lubricated engines, including the CV40.
• Size: 2-1/4 inches in height, ensuring proper fitment.
• Filtration Efficiency: Removes harmful contaminants to protect engine components.
• OEM Quality: Manufactured to exact Briggs and Stratton standards, ensuring durability and warranty compliance.

While another filter, the 5049K, is also used for select Intek engines, the 492932S is the most commonly recommended part number for the CV40. To confirm compatibility, check your engine’s model number (e.g., 40×5, 40×6, 40×7) using the Briggs and Stratton parts lookup tool (Parts Lookup).

Alternative Filters

The 842921 filter (Briggs & Stratton 842921) is designed for select Vanguard V-twin Big Block engines, which may not apply to the CV40 unless it’s a larger model. Always verify the engine’s specifications before using an alternative filter. Aftermarket filters, such as those from Wix or Purolator, may be available, but they risk compatibility issues and may void your warranty. Sticking with the 492932S ensures peace of mind and optimal performance.

How to Install the Oil Filter

Replacing the oil filter on your Briggs and Stratton CV40 is a straightforward task that can be completed with basic tools. Follow these steps to ensure a proper installation:

1. Prepare the Engine:
   
   • Park the mower on a flat surface and disconnect the spark plug wire to prevent accidental starting.
   • Place a drain pan under the engine to catch old oil.
2. Drain the Old Oil:
   
   • Remove the oil drain plug, typically located at the bottom of the engine, using a 3/8″ drive socket wrench.
   • Allow the oil to drain completely into the pan.
3. Remove the Old Filter:
   
   • Locate the oil filter, usually on the side of the engine.
   • Use an oil filter wrench to unscrew the old filter counterclockwise. Be cautious of residual oil spilling out.
4. Prepare the New Filter:
   
   • Apply a thin layer of fresh SAE 30 oil to the rubber gasket on the new 492932S filter. This ensures a tight seal and eases future removal.
5. Install the New Filter:
   
   • Screw the new filter onto the engine by hand until it’s snug.
   • Tighten it an additional 1/2 to 3/4 turn by hand or with a wrench. Avoid overtightening to prevent gasket damage.
6. Refill with Oil:
   
   • Replace and tighten the oil drain plug.
   • Add 20-24 ounces of SAE 30 oil through the oil fill port, checking the dipstick to avoid overfilling.
7. Check for Leaks:
   
   • Reconnect the spark plug wire and start the engine for a few minutes.
   • Inspect the filter for leaks and recheck the oil level, topping off if necessary.

This process ensures your CV40 engine is properly lubricated and protected by a fresh oil filter.

Maintenance Tips for the CV40 Engine

To keep your Briggs and Stratton CV40 engine in top condition, follow these additional maintenance tips:

• Regular Oil Changes: Change the oil every 50 hours or annually, using SAE 30 oil above 40°F (Oil Finder).
• Air Filter Maintenance: Clean or replace the air filter every season to prevent dirt from entering the engine.
• Spark Plug Replacement: Install a new spark plug annually or as specified in the owner’s manual.
• Fuel System Care: Use fresh fuel with a stabilizer to prevent ethanol-related issues.
• Cooling System: Keep cooling fins clean to avoid overheating, especially during heavy use.
• Check Model Number: Always verify your engine’s model number (stamped on the valve cover) to ensure you’re using the correct parts (Model Number Lookup).

These practices will extend the life of your CV40 engine and minimize repair costs.

Comparison of Oil Filters for Briggs and Stratton Engines

This table highlights the 492932S as the primary choice for the CV40, with the 5049K as a potential alternative if specified by the model number.

FAQs

Can I use a different brand of oil filter for the CV40?

While aftermarket filters like Wix or Purolator may fit, it’s best to use the Briggs and Stratton 492932S to ensure compatibility and maintain warranty coverage. Non-OEM filters may cause leaks or inadequate filtration.

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

Replace the oil filter every 100 hours of use or annually, whichever comes first, to keep the engine clean and efficient (How to Change Oil).

What happens if I don’t change the oil filter?

A clogged or old filter can allow contaminants to circulate, leading to increased wear, reduced performance, or engine failure. Regular replacement is critical for engine health.

Can I use synthetic oil in the CV40?

Yes, synthetic SAE 30 oil can be used, offering better protection and potentially longer intervals between changes. Always consult the owner’s manual for recommendations.

Is the CV40 the same as the Model 40 V-Twin?

The CV40 is likely a Model 40 V-twin in the Intek series, sharing similar specifications. Verify the model number (e.g., 40×5) to confirm (Model 40 Parts).

Conclusion

The Briggs and Stratton CV40, a powerful V-twin engine, relies on the 492932S oil filter to maintain its performance and longevity. This OEM filter ensures proper filtration, oil pressure, and compliance with warranty and emission standards. By following the installation steps and maintenance tips outlined in this guide, you can keep your CV40 engine running smoothly for years. Always verify your engine’s model number to confirm part compatibility and consult the Briggs and Stratton website for additional resources. For genuine parts and expert advice, visit Briggs & Stratton Online Store or contact an authorized dealer today.