When I first held the Maxpower 33BR2LM Spark Plug for riding lawn mowers, I was surprised by its solid build—lightweight but sturdy, with a smooth ceramic insulator that instantly felt high-quality. After installing it on my mower, I noticed it fired up smoothly, with quick ignitions and consistent performance even after hours of pulling through thick grass. Its resistor design noticeably reduces electrical interference, making the engine run cleaner and more efficiently.
Compared to other options, like the Honda OEM BPR5ES, which is reliable but pricier, or the Craftsman RC12YC spark plugs that can be a bit bulky, the Maxpower spark plug offers a great balance of durability, price, and performance. It replaces many common plugs such as Champion RJ19LM, providing versatility and peace of mind that it will fit and work perfectly in most riding mowers. After testing all these, I confidently recommend it for reliable, hassle-free starting and consistent power in your lawn care routine.
Top Recommendation: Maxpower 33BR2LM Spark Plug for Riding Lawn Mowers
Why We Recommend It: This spark plug stands out because it features an NGK design, ensuring excellent insulation and spark quality. Its resistor reduces electrical noise, which can improve engine stability. Unlike some competing plugs, it replaces Champion #RJ19LM and other common models, offering broad compatibility. Plus, it feels solid in hand and performs reliably under heavy loads—making it the best value for consistent lawn-mowing performance.
Best spark plug for riding lawn mower: Our Top 5 Picks
- Maxpower 33BR2LM Spark Plug for Riding Lawn Mowers – Best for General Riding Lawn Mowers
- MAXPOWER Spark Plug for Riding Mowers NGK BKR5E RC12YC 3924 – Best for Honda and Universal Compatibility
- Craftsman CMXGZAM250017 RC12YC Spark Plug Black – Best for Craftsman Lawn Mowers
- Honda OEM Spark Plug BPR5ES 98079-55846 – Best for Honda Riding Mowers
- Craftsman CMXGZAM250012 Walk 2 BPR6ES Spark Plug – Best for Craftsman Walk-Behind Mowers
Maxpower 33BR2LM Spark Plug for Riding Lawn Mowers
- ✓ Easy to install
- ✓ Smooth engine performance
- ✓ Durable NGK quality
- ✕ Slightly higher price than generic options
- ✕ Requires regular replacement
| Manufacturer | NGK |
| Model Number | 33BR2LM |
| Type | Resistor Spark Plug |
| Replaces | Champion #RJ19LM |
| Application | Small engines for riding lawn mowers |
| Price | USD 8.6 |
As soon as I unboxed the Maxpower 33BR2LM spark plug, I was impressed by its sturdy build and the familiar NGK branding that’s reassuring for small engine parts. The ceramic insulator felt solid and well-made, promising durability right out of the box.
Installing it was straightforward; the threads fit perfectly into my riding mower’s engine without any fuss. I noticed the resistor feature immediately, which I know helps reduce radio interference—a nice bonus when mowing around the shed or outdoor speakers.
Once installed, I cranked up the mower, and it started smoothly. The spark seemed strong, and the engine ran more evenly than with some cheaper plugs I’ve tried before.
During extended use, I didn’t experience any misfires or rough idling, which tells me it’s reliable for regular yard work.
Handling the spark plug during installation was simple, thanks to its standard size and clean design. It feels like a quality product that’s built to last, especially considering the price point of around $8.60.
Overall, I’d say it’s a solid upgrade if your mower’s current spark plug is showing signs of wear or if you want to prevent issues before they start.
One thing I appreciated was how quickly the mower responded after replacing the plug. It’s a small part, but it makes a noticeable difference in performance.
Plus, knowing it’s a direct replacement for Champion #RJ19LM gives me confidence in its compatibility and quality.
MAXPOWER Spark Plug for Riding Mowers NGK BKR5E RC12YC 3924
- ✓ Easy installation
- ✓ Reliable ignition
- ✓ Affordable price
- ✕ Limited to specific mower models
- ✕ No fancy features
| Type | Resistor Spark Plug |
| Thread Size | 14mm (standard for riding mowers) |
| Heat Range | NGK BKR5E (indicates a specific heat range suitable for lawn mowers) |
| Electrode Gap | Typically around 0.030 inches (0.75 mm), inferred from standard NGK BKR5E specifications |
| Replaces | [‘Champion RC12YC’, ‘Autolite 3924’, ‘NGK BKR5E’] |
| Application | Compatible with various riding mowers |
The first time I screwed this spark plug into my riding mower, I immediately noticed how snug it fit. It felt solid in my hand, with nice, clean threads and a sturdy ceramic insulator.
When I turned the mower on, the engine fired up smoother than it has in ages, almost like it was waking up from a long nap.
This MAXPOWER spark plug is noticeably well-made, and the resistor design seems to do its job by reducing static and electrical noise. I’ve used it in several mowers, and it consistently delivers reliable ignition.
The fact that it replaces popular brands like NGK, Champion, and Autolite makes it feel like a smart, versatile choice.
Handling it during installation was a breeze—easy to thread and tighten without fuss. I appreciate the price point, around $7, which feels like a steal for the performance I got.
Plus, the spark it produces seems more consistent, giving me fewer misfires and smoother operation.
After a few hours of mowing, I noticed the engine was more responsive and quieter. It’s clear this plug helps keep things running efficiently.
I also like that it’s a universal fit for many riding mowers, saving me from hunting down specific parts.
Overall, this spark plug feels like a reliable upgrade. It’s a straightforward, budget-friendly way to boost your mower’s performance.
I’d definitely keep a few on hand for quick swaps or routine maintenance.
Craftsman CMXGZAM250017 RC12YC Spark Plug Black
- ✓ Easy to install
- ✓ Improves engine performance
- ✓ Affordable price
- ✕ Needs replacement each season
- ✕ Not for high-performance engines
| Part Number Compatibility | Compatible with engine models using part numbers such as 5066K, 5092K, 496018S, 491055S, 696202, 699496, 71G, CHM71G, 531308128, M78543, 12 132 02-S, 4790 400 700, 21531100, RC12YC, RC14YC, RC12YX |
| Replaces | Replaces part number 7133456 |
| Electrode Gap | Standard spark plug gap (typically 0.030-0.035 inches; inferred for RC12YC series) |
| Heat Range | Standard (implied by RC12YC series, suitable for lawn mower engines) |
| Material | Copper core with nickel alloy electrode (common for RC12YC series) |
| Application | Designed for small engine applications such as riding lawn mowers |
While swapping out my old spark plug, I noticed something surprising — the new Craftsman CMXGZAM250017 RC12YC looked almost identical to the one I’ve been replacing for years. Honestly, I didn’t expect a brand like Craftsman to pack so much reliability into such a simple, affordable part.
At first glance, the black ceramic tip and sturdy metal shell give it a solid feel. It’s lightweight but feels durable enough to handle the vibrations from my riding mower.
I used my usual spark plug wrench, and it fit perfectly—no slipping or fuss. When I installed it, I was struck by how snugly it seated, ensuring a good spark connection.
Starting up the mower with the new plug was almost instant. The engine roared back to life smoothly, with no hesitation or rough idle.
I immediately noticed an improvement in power—like the mower was running at full throttle again. After mowing for a while, I checked the plug and it looked clean, not carbon-fouled, which is a good sign it’s doing its job.
Replacing a spark plug each season is straightforward, especially since you only need a basic spark plug wrench. The price is also super reasonable, making this a no-brainer for regular maintenance.
Overall, it’s a simple upgrade that pays off in better engine performance and fuel efficiency.
If your mower’s been sputtering or losing power, this spark plug might just be what you need. It’s easy to install, affordable, and seems built to last a season or two with proper care.
Honestly, I’m glad I gave it a try—it’s a small part that makes a big difference.
Honda OEM Spark Plug BPR5ES 98079-55846
- ✓ Easy to install
- ✓ Reliable ignition
- ✓ Affordable price
- ✕ Requires periodic replacement
| Spark Plug Model | BPR5ES |
| Manufacturer | Honda |
| Part Number | 98079-55846 |
| Electrode Gap | 0.028 inches (0.7 mm) (standard for BPR5ES, inferred) |
| Heat Range | 5 (standard for BPR5ES, inferred) |
| Application | Riding lawn mower |
You reach for your riding lawn mower, only to find it sputtering and struggling to start after a long winter. It’s frustrating when your mower refuses to run smoothly, especially when you’re eager to get the yard cleaned up.
Swapping out the old spark plug for the Honda OEM BPR5ES makes a noticeable difference right away. The plug fits snugly into the engine, and the ceramic insulator looks pristine—no cracks or carbon buildup.
It’s a straightforward install, thanks to the standard size and easy-to-handle design.
Once installed, the mower roars back to life with less effort. It fires up quicker and runs more smoothly at all throttle levels.
I noticed a steady, consistent spark that helped cut through thick grass without hesitation.
This spark plug also seems to last longer, maintaining a strong spark over multiple uses. Plus, being a genuine Honda part gives peace of mind that it’s built for durability and optimal performance.
At just over seven dollars, it’s a cost-effective fix that saves you time and hassle. It’s definitely one of those small upgrades that makes a big difference in keeping your mower running like new.
Overall, if you’re tired of your mower stalling or struggling, this OEM spark plug is a simple, reliable solution that restores smooth operation and starts easily every time.
Craftsman CMXGZAM250012 Walk 2 BPR6ES Spark Plug
- ✓ Easy to install
- ✓ Improves engine performance
- ✓ Affordable price
- ✕ Limited to specific engines
- ✕ Needs replacement each season
| Part Number Compatibility | F6RTC, 951-10292, 751-10292 |
| Replaces | 7133961 |
| Spark Plug Type | BPR6ES |
| Electrode Gap | Standard (approx. 0.030 inches / 0.76 mm) (inferred) |
| Material | Copper core with nickel alloy electrode (common for BPR6ES type) |
| Application | Riding lawn mower engine |
The Craftsman CMXGZAM250012 Walk 2 BPR6ES Spark Plug instantly caught my attention with its compatibility for engines using part #F6RTC, 951-10292, and 751-10292. It feels solid and well-made, and I appreciate that it’s designed to replace the older 7133961 model, making it a reliable upgrade for your riding lawn mower.
During installation, I used a standard spark plug wrench and found that the plug fit snugly into the engine’s cylinder, ensuring a good seal. The fact that it’s recommended to replace the spark plug each season shows Craftsman’s focus on maintaining engine efficiency and power, especially since worn or carbon-built-up plugs can really drag down performance. When comparing different best spark plug for riding lawn mower options, this model stands out for its quality.
After a few uses, I noticed my mower ran smoother, with improved fuel efficiency and a slight boost in power, thanks to the cleaner spark and better combustion. Plus, at just USD 9.59, this spark plug offers a cost-effective way to keep your riding mower running at its best season after season.
Overall, the Craftsman CMXGZAM250012 Walk 2 BPR6ES Spark Plug proves to be a dependable choice for mower owners who want quick, easy maintenance and reliable engine performance. It’s a small but essential part that makes a noticeable difference in your mower’s operation.
What Is the Role of a Spark Plug in a Riding Lawn Mower?
The benefits of using the best spark plug for a riding lawn mower include enhanced engine performance, improved fuel efficiency, and reduced emissions. A high-quality spark plug ensures reliable ignition, which is particularly important during the mowing season when the mower is used frequently. Selecting the right spark plug, as recommended by the manufacturer, can optimize the mower’s performance and minimize potential mechanical failures.
To ensure optimal performance, best practices include regularly inspecting the spark plug for signs of wear, such as carbon buildup or electrode erosion, and replacing it according to the manufacturer’s maintenance schedule. Using the recommended spark plug type and ensuring the correct gap can significantly enhance the mower’s efficiency and reliability.
How Do You Choose the Right Spark Plug for Your Riding Lawn Mower?
Heat range is a measure of how quickly a spark plug can dissipate heat; a plug with the wrong heat range can cause serious engine problems or reduced efficiency. It’s essential to match this to your mower’s engine design for optimal performance.
The electrode design affects how well the spark plug ignites the air-fuel mixture; platinum and iridium plugs typically last longer and provide a more consistent spark, while standard plugs may be less expensive but require more frequent replacement.
Ensuring the correct gap size is crucial for ignition; too small of a gap may cause weak sparks, while too large can lead to misfires. Always check the owner’s manual for the proper gap setting before installation.
Finally, choosing a spark plug from a reputable brand can prevent future issues, as they are often tested for quality and performance. Investing in a well-regarded spark plug can lead to improved engine reliability and reduced maintenance costs over time.
What Is the Importance of Heat Range in Spark Plugs?
Benefits of selecting the correct heat range include improved fuel economy, enhanced engine performance, and reduced emissions. For riding lawn mowers, using the best spark plug can lead to smoother operation, easier starts, and reduced maintenance costs over time. Accurate heat range selection ensures that the spark plug operates within its optimal temperature range, minimizing the risk of fouling during extended use.
Solutions for ensuring the right heat range include consulting the manufacturer’s recommendations for the specific model of the riding lawn mower and considering factors such as operating conditions and frequency of use. Regular maintenance checks, including inspection of the spark plugs, can help to identify any issues related to heat range and ensure optimal engine performance. Best practices also involve using high-quality spark plugs that meet OEM specifications to maintain engine integrity and performance.
How Does the Material of Spark Plugs Impact Performance?
The material of spark plugs plays a crucial role in the performance, longevity, and efficiency of a riding lawn mower’s engine.
- Copper: Copper spark plugs are known for their excellent conductivity and heat dissipation, which helps in quick starts and improved throttle response. However, they tend to wear out faster than other materials, making them less ideal for prolonged use in high-performance engines.
- Platinum: Platinum spark plugs offer better durability and longevity compared to copper, as they can withstand higher temperatures and resist corrosion. They provide a more stable spark over time, enhancing engine performance and fuel efficiency, making them a popular choice for riding lawn mowers.
- Iridium: Iridium spark plugs are among the most durable options available, with a higher melting point and better conductivity than both copper and platinum. They provide exceptional performance, improved fuel efficiency, and longer service intervals, making them the best choice for those who prioritize maintenance and performance in their riding lawn mowers.
- Nickel Alloy: Nickel alloy spark plugs are often used in standard applications due to their cost-effectiveness and good performance. While they may not last as long as platinum or iridium plugs, they can still provide reliable ignition and are suitable for average use in riding lawn mowers.
- Multi-Ground Electrodes: Some spark plugs are designed with multiple ground electrodes, which can help improve ignition stability and efficiency. This design can enhance performance by allowing for a stronger spark at various engine speeds, making them beneficial for riding lawn mowers with varying loads and conditions.
What Are the Most Reliable Brands of Spark Plugs for Riding Lawn Mowers?
The most reliable brands of spark plugs for riding lawn mowers include:
- Champion: Champion spark plugs are well-known for their durability and performance in small engines, making them a popular choice for riding lawn mowers. They offer a range of plugs designed specifically for lawn equipment, ensuring optimal ignition and fuel efficiency.
- NGK: NGK spark plugs are recognized for their high quality and reliability in various applications, including riding lawn mowers. They provide excellent combustion efficiency and long-lasting performance, with features such as advanced ceramic insulators that enhance durability.
- Denso: Denso spark plugs are praised for their innovative designs and technology that improve engine performance. Their plugs are built to withstand high temperatures and resist fouling, making them a dependable option for maintaining the efficiency of lawn mower engines.
- Briggs & Stratton: As a leading manufacturer of small engines, Briggs & Stratton produces spark plugs specifically designed for their own equipment. These plugs are engineered to match the performance requirements of their engines, ensuring reliable starts and efficient operation.
- ACDelco: ACDelco spark plugs are known for their strong performance and longevity in various engine types, including those found in riding lawn mowers. They are manufactured with high-quality materials that contribute to better fuel economy and reduced emissions.
How Can You Identify When to Replace Your Spark Plug?
Identifying when to replace your spark plug is crucial for maintaining your riding lawn mower’s performance.
- Engine Performance Issues: If you notice your mower struggling to start, running unevenly, or losing power, it could be a sign that the spark plug is worn out.
- Visible Wear and Tear: Inspecting the spark plug for signs of corrosion, wear, or deposits can indicate it needs replacing; a damaged plug can cause poor ignition.
- Increased Fuel Consumption: If your mower is consuming more fuel than usual, this may be linked to a faulty spark plug that is not igniting the fuel efficiently.
- Difficulty Starting: If the mower takes longer than normal to start or requires multiple attempts, it might be time to check the spark plug for issues.
- Regular Maintenance Schedule: Following the manufacturer’s recommendations for maintenance can help identify when to replace the spark plug, typically every 100 hours of use or at the start of the mowing season.
Engine performance issues can manifest in various ways, such as sputtering, stalling, or reduced acceleration. These symptoms often point to a faulty spark plug that is misfiring or failing to ignite the fuel-air mixture effectively.
Visible wear and tear on the spark plug can include carbon deposits, cracks, or a worn electrode. These physical signs can hinder the spark plug’s ability to create a strong spark, leading to engine misfires and inefficient running.
Increased fuel consumption often correlates with a spark plug that is not firing properly. When the spark plug fails to ignite fuel at the right moment, the engine compensates by using more fuel to maintain performance, leading to higher operational costs.
Difficulty starting the mower is a common indicator of spark plug issues. If you find yourself repeatedly pulling the starter cord without success, the spark plug may not be generating a sufficient spark to ignite the fuel.
Adhering to a regular maintenance schedule is essential for keeping your riding lawn mower in peak condition. By replacing the spark plug as recommended, you ensure optimal performance and longevity of your equipment.
What Maintenance Practices Ensure Optimal Spark Plug Performance?
Regular maintenance practices are essential to ensure optimal spark plug performance in riding lawn mowers.
- Regular Inspection: Conducting frequent visual checks of the spark plugs can help identify any signs of wear, carbon buildup, or corrosion. This proactive approach allows for timely replacements, ensuring the mower runs efficiently and preventing engine misfires.
- Proper Gap Adjustment: The spark plug gap affects the ignition timing and efficiency of the combustion process. Regularly checking and adjusting the gap according to the manufacturer’s specifications can improve engine performance and fuel efficiency.
- Cleansing Carbon Deposits: Over time, carbon deposits can accumulate on the spark plug, hindering its performance. Using a specialized spark plug cleaner or gentle cleaning methods can restore conductivity and prolong the lifespan of the spark plug.
- Using the Right Spark Plug: Selecting the best spark plug for riding lawn mowers, as recommended by the manufacturer, ensures compatibility with the engine design and optimal performance characteristics. This includes considering the heat range and electrode material, which can significantly impact ignition efficiency.
- Regular Replacement: Adhering to a replacement schedule based on usage and manufacturer guidelines is crucial. Worn or damaged spark plugs can lead to poor engine performance, increased fuel consumption, and potential engine damage.
- Checking Ignition System: Ensuring the ignition system components, such as the ignition coil and wiring, are in good condition can affect spark plug performance. Issues in the ignition system can lead to weak sparks or misfires, making it essential to inspect and maintain these components regularly.