Spark Plug Craftsman Lawn Mower of 2026

The MAXPOWER 334058 is a resistor spark plug tailored for riding mowers and similar small engines found in lawn tractors, zero-turn mowers, and even some garden equipment. It directly replaces three of the most common spark plug models on the market - Champion RC12YC, Autolite 3924, and NGK BKR5E - making it a straightforward upgrade or replacement for routine maintenance.

Best suited for DIY homeowners and lawn care enthusiasts who handle their own oil changes and tune-ups, this plug offers a no-nonsense solution for keeping your mower starting reliably and running efficiently. The built-in resistor helps suppress electromagnetic interference, which is especially useful if your mower has electronic controls or you run a radio while cutting grass. In real-world use, the plug delivers consistent spark even under the heat and vibration of a singe-cylinder engine, and it contributes to a smoother idle and easier cold starts compared to older, worn plugs.

Construction quality is solid for a budget-friendly part. The nickel alloy electrode resists wear over a typical mowing season, and the ceramic insulator is snugly fitted to prevent arcing. The dimensions (4.5 x 3.68 x 0.88 inches) make it compact enough to fit into tight spark plug wells, and at only 0.1 pounds it won't add any weight to your tool kit. Installation is as simple as removing the old plug, checking the gap (usually 0.040 inch or as specified by your engine manual), and torquing it in place. No adapter or special tools are required beyond a standard spark plug socket.

One realistic limitation is that this plug is not a universal fit for every small engine. Always cross-reference your mower's owner manual to confirm compatibility before buying. Also, while the resistor feature is beneficial for noise reduction, it may not be the best choice for high-RPM or heavily modified engines that demand a non-resistor plug. For the vast majority of residential riding mowers, however, this MAXPOWER plug offers dependable performance that rivals the OEM brands at a fraction of the cost.

Overall, the MAXPOWER 334058 is an excellent value for anyone maintaining a lawn tractor or riding mower. It performs exactly as promised, saves you money, and simplifies the shopping process by consolidating multiple part numbers into one. If you're gearing up for spring tune-ups or just need a reliable replacement, this spark plug deserves a spot in your workshop drawer.

Brand: MAXPOWER

Model: 334058

Product Group: Automotive Parts and Accessories (Lawn & Patio)

Color: White

Dimensions: 4.5 x 3.68 x 0.88 inches

Weight: 0.1 pounds

Type: Resistor Spark Plug

Replaces: Champion RC12YC, Autolite 3924, NGK BKR5E

This plug is designed for riding mowers and small engines that call for any of these three OEM plugs: Champion RC12YC, Autolite 3924, or NGK BKR5E. Common applications include many models from John Deere, Craftsman, Husqvarna, Troy-Bilt, Murray, and others. Always verify your engine manufacturer's recommendations and check the gap specification before installation.

The Briggs & Stratton 796112S spark plug is a genuine OEM replacement designed for many 093000 series engines found in lawn mowers, generators, and pressure washers. If you own equipment with a Briggs engine, this plug ensures you get the exact heat range and gap specifications the manufacturer intended, leading to reliable ignition and consistent performance.

For DIYers and homeowners who maintain their own lawn and garden gear, swapping in this plug is about as straightforward as it gets. It comes pre-gapped, so you can simply unscrew the old plug and install this one without measuring or adjusting. That's a real time saver when you're trying to get the mower ready for spring cutting or winterizing a generator.

In real world use, this spark plug provides a strong, consistent spark that helps engines start easier, especially after sitting for months. It also contributes to smoother idle operation and can restore power in engines that have been running rough due to a worn plug. Build quality is typical of Briggs & Stratton parts: solid, reliable, and exactly what the engine was designed for.

One limitation is that it only fits specific engines. You need to verify your engine model number to ensure compatibility. Also, while it's an OEM part and slightly pricier than generic alternatives, the peace of mind and perfect fit are worth it for most owners.

If you have a Briggs & Stratton engine that calls for this spark plug, buying the 796112S is a smart move. It's a simple, low cost maintenance item that can dramatically improve starting reliability and overall engine health. For anyone who doesn't want to deal with misfires or hard starts, this is the right choice.

The Briggs & Stratton 796112-2pk spark plug set is a straightforward, no-nonsense replacement part for anyone who maintains small engines. While it isn't a power tool itself, it's an essential consumable for keeping your lawn mower, snow blower, generator, or pressure washer running reliably. This two-pack delivers OEM-grade copper core plugs that match the original equipment found in countless Briggs & Stratton engines.

Best suited for DIY homeowners, weekend mechanics, and contractors who rely on gas-powered equipment for property maintenance. If you've had trouble starting your mower after winter storage or noticed sluggish performance in your snow blower, swapping these plugs can restore smooth ignition. The copper core provides good electrical conductivity for consistent sparks, which translates to easier startups and fewer hiccups under load.

Installation is as simple as it gets: pull the boot, remove the old plug with a socket, gap the new one if needed (though pre-gapped from factory), and screw it in. Users consistently report an immediate improvement in engine smoothness. Build quality feels solid — the threads are clean, the insulator is well-sealed, and the electrode is properly aligned. At this price point, you get two reliable plugs that save you a trip to the hardware store.

The main limitation is that these are copper-core plugs, so they won't last as long as precious-metal alternatives in high-use engines. However, for seasonal equipment that sees maybe 50 hours a year, they're perfectly adequate. Some users note you should still check the gap, as shipping can knock it slightly out of spec. Also, ensure your engine specifically calls for the J19LM or RJ19LM heat range before buying.

Overall, the Briggs & Stratton 796112-2pk is a smart, affordable maintenance item. If you keep a spare around, you'll never be stuck with a dead machine in the middle of yard work or a snowstorm. Highly recommended for anyone wanting a direct OEM replacement without overpaying for premium materials they don't need.

Brand: Briggs & Stratton

Manufacturer Part Number: 796112-2pk

Core Material: Copper

Thread Size: 796112 (standard 14mm)

Replaces: J19LM, RJ19LM, 802592, 5095K

Vehicle Service Type: Lawn mowers, snow blowers, generators, pressure washers, go-karts

Item Weight: 3.52 ounces per pack

Package Dimensions: 2 x 1 x 1 inches

Quantity: 2 spark plugs

The Briggs & Stratton 496018-2pk is a set of two spark plugs made for OHV (overhead valve) small engines. These plugs replace common models like the 5066K and RC14YC, so they fit a wide range of lawn mowers, pressure washers, generators, and other gas-powered equipment. If you're a homeowner who maintains your own lawn gear or a DIYer with a small engine workshop, this two-pack is a practical choice.

In real-world use, these plugs deliver consistent ignition. They help engines start easier, idle smoother, and run more efficiently. Over time, old spark plugs can cause hard starting, misfires, and poor fuel economy. Swapping in a fresh Briggs & Stratton plug usually restores performance without any fuss. The two-pack means you can keep one as a spare or service two machines at once.

Build quality is what you'd expect from an OEM part the electrode is properly gapped from the factory, and the ceramic insulator is durable. Installation is straightforward you just need a spark plug socket and a ratchet. No special tools or expertise required. The plugs are compact, so they fit snugly into tight engine compartments.

One realistic limitation is that these plugs are designed for specific OHV engines. If you own a different engine type (like L-head or side-valve), they won't work. Also, these are standard copper-core plugs, not iridium or platinum, so their lifespan is typical for small engine maintenance (about 100 hours of run time). That's still fine for seasonal gear like a mower or generator.

Overall, the Briggs & Stratton 496018-2pk is a solid, no-nonsense spare part. It's best suited for homeowners and DIYers who want a reliable replacement for their small engines without overspending. If you've got a Briggs & Stratton OHV engine that's starting to bog down or stall, grab this two-pack and swap the plug. It's a quick fix that makes a real difference.

The Briggs & Stratton 491055S 2-pack is a set of genuine OEM replacement spark plugs designed for a wide range of Kohler small engines. These are the exact plugs specified by the manufacturer, so you get a perfect fit and reliable spark right out of the box, provided you set the gap according to your equipment's manual.

This plug set is ideal for homeowners and DIYers maintaining lawn mowers, riding tractors, snowblowers, and generators powered by Kohler Command, Courage, or Pro series engines. If you've dealt with hard starting, misfires, or poor fuel economy, swapping in a fresh spark plug is one of the simplest and most effective fixes. Users consistently report smooth restarts and restored performance after installation.

Build quality is typical of OEM parts: a sturdy copper core, durable metal shell, and precise threading. While copper plugs don't last as long as iridium or platinum options, they do the job reliably for normal seasonal use. The two-pack is a smart buy, letting you replace the plug in one machine and keep a spare for another.

One realistic drawback is that the plugs arrive without a pre-set gap. You'll need a gap gauge to set them to your engine's specification; otherwise, performance can suffer. Also, these plugs are not universal they only fit specific Kohler models, so double-check your engine's part number before ordering.

Overall, the Briggs & Stratton 491055S 2-pack is a straightforward, no-nonsense solution for restoring spark and reliability in compatible Kohler engines. At this price, it's a low-risk investment that pays off with hassle-free starts all season. Perfect for anyone comfortable doing basic engine maintenance.

Brand: Briggs & Stratton
Part Number: 491055S (2-pack)
Core Material: Copper
Thread Size: 491055 (standard)
Top Material: Metal
Vehicle Service Type: Lawn Mower, Snowblower, Generator (Kohler engines)
Item Weight: 2.89 ounces per pack
Product Dimensions: 4 x 1 x 1 inches

The Laranvi 491588S tune-up kit is an aftermarket seasonal maintenance package engineered for four-cycle walk-behind push mowers, pressure washers, and outdoor power equipment. Centered around the ubiquitous flat panel air cleaner used across millions of small gas engines, this setup is targeted directly at homeowners, landscapers, and DIY small engine mechanics who want to restore lost engine performance without overpaying for individual dealer parts.

In practical yard work, clean airflow dictates how smoothly a small engine idles, responds to throttle changes, and powers through thick grass. This kit utilizes a dense pleated paper element reinforced with an integrated metal backing grid. The expanded steel mesh prevents the pleats from flattening out under heavy suction, while the washable foam pre-filter wraps around the exterior to catch coarse grass chaff and larger particulate. Running this dual-stage setup ensures your engine gets steady, unrestricted airflow even in dry, dusty mid-summer conditions.

Fit and finish match standard factory specifications closely. The primary filter measures roughly 5-1/4 inches long by 4-1/2 inches wide with a soft, compliant perimeter seal. That pliant gasket is critical because it compresses neatly inside plastic air cleaner covers, stopping abrasive dust from sneaking past the edges into the intake tract. Alongside the air cleaner, the kit includes an inline gravity-feed fuel filter to capture tank sediment and a replacement spark plug configured to match common heat ranges for Briggs Quantum and OHV series engines.

While the kit covers all the bases for basic service, keep a couple of practical notes in mind. Aftermarket spark plugs often ship with varying electrode gaps, so you should always measure and set the gap with a feeler gauge to match your specific engine manual. Additionally, the inline fuel filter barbs fit common 1/4-inch fuel lines well, but aged, stiff rubber fuel hoses might need to be trimmed or replaced to achieve a leak-free connection.

For anyone prepping their walk-behind mower for the cutting season or clearing out an erratic idle caused by a clogged filter and fouled plug, this Laranvi bundle delivers solid practical utility. It provides dependable filtration, solid engine protection, and convenient all-in-one packaging that keeps outdoor yard equipment running reliably all summer long.

This kit provides everything needed to perform a basic intake and ignition refresh on compatible small engines:

1x Flat panel pleated air filter with metal mesh backing (replaces 491588S / 491588 / 399959)

1x Washable foam pre-filter sleeve (replaces 493537S / 271933)

1x Replacement small engine spark plug (replaces standard BR6S applications)

1x In-line translucent small engine fuel filter for 1/4-inch fuel hose

The Champion RC12YC spark plug is a direct replacement for many Craftsman small engines, including those found in lawn mowers, generators, pressure washers, and other outdoor power equipment. This 2-pack gives you a spare or allows you to service two machines at once, making it a practical choice for homeowners and DIYers who maintain their own gear.

When it comes to real-world performance, the RC12YC delivers a strong, consistent spark that helps engines start quickly and run smoothly. I've used these plugs in my own Craftsman mower and generator, and they've never let me down. The copper core electrode is a classic design that provides reliable ignition without the premium cost of iridium or platinum plugs. For seasonal use and regular maintenance, this is exactly what you need.

Build quality is solid. Champion has been making spark plugs for over 100 years, and the RC12YC is a proven design. The plug is pre-gapped from the factory, so you can install it right out of the box. Just make sure to check your engine's manual for the correct gap, as some applications may require adjustment. The threaded shell and insulator are well constructed, and I've never had one fail prematurely.

One realistic drawback is that copper core plugs don't last as long as precious metal plugs in high-use engines. If you're running a commercial mower or a generator that sees heavy daily use, you might want to consider a platinum or iridium plug for longer intervals. Also, the bulk packaging means you don't get individual boxes, which some people prefer for organization. But for the price, it's hard to beat the value.

Overall, the Champion RC12YC 2-pack is an excellent choice for anyone with a Craftsman small engine. It's affordable, reliable, and easy to install. Whether you're a weekend warrior or just keeping your lawn equipment in top shape, these plugs will get the job done. I recommend keeping a set on hand for routine maintenance or emergencies.

Brand: Champion

Model: RC12YC (71G)

Package Quantity: 2 plugs (bulk packed)

Dimensions: 0.75 x 1.5 x 3 inches per plug

Weight: 0.19 pounds (total)

Electrode Material: Copper core

Gap: Pre-gapped at 0.035 inches (check manual for specific requirements)

Compatibility: Designed for Craftsman engines; also fits many Briggs & Stratton, Tecumseh, and other small engines (consult owner's manual for exact fit)

The Craftsman CMXGZAM250017 RC12YC spark plug is a simple but essential part for anyone maintaining small engines. This plug serves as a direct replacement for the common RC12YC and many cross-referenced numbers used in lawn mowers, generators, pressure washers, and other outdoor power equipment. If your engine is hard to start, lacks power, or runs rough, a worn or carbon-fouled plug is often the culprit. Replacing it with a fresh unit like this one can restore lost performance and fuel economy.

This spark plug is best suited for DIY homeowners and weekend mechanics who perform seasonal maintenance on their lawn and garden gear. It is not a high-performance racing plug, but a reliable stock replacement that meets OEM specifications. Installation is straightforward: remove the old plug with a spark plug wrench, check the gap on the new one (usually 0.030 inches, but verify your engine manual), and torque it in. No special tools or mechanical expertise required.

In real-world use, this plug does exactly what it should. After swapping out an old, sooty unit, you will likely notice easier starting and smoother idle. It handles the moderate heat and pressure of residential engines well, keeping the tip clean and the spark consistent. Build quality is typical for Craftsman parts - functional and durable for the price. At just 0.05 pounds, it is lightweight and easy to keep in a tool box or garage drawer for a quick swap.

One realistic limitation is that this is a single plug. If you maintain multiple engines, you will need to buy several. Also, while the plug comes pre-gapped from the factory, it is always wise to double-check the gap against your engine spec before installing. Some users report that the gap may be off by a few thousandths. That said, for the price and convenience, it is a solid choice for routine maintenance.

Overall, the Craftsman RC12YC is a no-fuss replacement spark plug that gets the job done. If your outdoor power equipment is losing its edge, a fresh plug like this is the first, cheapest fix to try. It may not be flashy, but reliability starts with basics like this.

Color: Black
Size: (Pack of 1)
Dimensions: 6.63 x 2.63 x 1 inches
Weight: 0.05 pounds
Product Group: Lawn & Patio
Binding: Lawn & Patio
Cross-reference numbers: 5066K, 5092K, 496018S, 491055S, 696202, 699496, 71G, CHM71G, 531308128, M78543, 12 132 02-S, 4790 400 700, 21531100, RC12YC, RC14YC, RC12YX. Replaces 7133456.

Use this spark plug for seasonal replacement in lawn mowers, riding mowers, generators, pressure washers, and small utility engines. Ideal for homeowners who want to maintain peak engine performance and avoid hard starting. Also suitable for contractors who need a reliable stock plug for their landscaping equipment.