A clean, properly gapped spark plug is crucial for starting your lawn mower and keeping it running smoothly. Over time, spark plugs accumulate deposits from combustion that can inhibit performance. Experts recommend inspecting and cleaning your mower’s spark plug regularly—every 25 hours of use as a general guideline.
Carefully remove the plug and use a wire brush or sandpaper to clear away carbon buildup. Check that the gap between the side electrode and center electrode is within the engine manufacturer’s specified range, usually between 0.020 and 0.030 inches. Adjust if needed with a feeler gauge and spark plug gap tool. Applying a small dab of anti-seize compound before reinstalling the plug makes future removal easier.
With routine spark plug maintenance, your lawn mower will start easily all season long.
Our Top Picks For 2025
The Briggs & Stratton 5092K is a copper core spark plug designed for overhead valve engines. This OEM replacement plug ensures proper fit and performance to maintain the life of your Briggs & Stratton engine.
The Briggs & Stratton 5092K Spark Plug is an original equipment manufacturer (OEM) replacement part designed for selected Briggs & Stratton overhead valve (OHV) engines. This high-quality spark plug features a copper core and metal tip to provide superior conductivity and durability.
Key features and benefits:
- OEM part ensures proper fit and engine performance
- Copper core for optimal conductivity
- Metal tip resists corrosion and wear
- Replaces Briggs & Stratton part #496018S
- Fits many Briggs & Stratton OHV engines
- Restores starting performance and fuel efficiency
The Briggs & Stratton 5092K is a reliable, OEM spark plug engineered to maintain your engine’s ignition performance. Its copper core and compatible design make it an excellent choice for replacing worn plugs on Briggs & Stratton overhead valve engines.
The Ring Outdoor Smart Plug is a dual outlet, weather-resistant smart plug that lets you control outdoor lights and appliances from anywhere. Connects to Ring Bridge for smart controls through the Ring app.
The Ring Outdoor Smart Plug is an innovative outdoor smart plug by Ring that allows you to easily control outdoor lights, appliances, and more right from your phone. This smart plug has two individually controllable outlets and is designed for outdoor use with a weather-resistant construction.
Key features and benefits:
- Dual outlet design with two separately controllable outlets
- Weather resistant construction (IP66 rating) for outdoor use
- Remote on/off control through the Ring app when connected to the Ring Bridge
- Set schedules, routines, and more for automatic control
- Surge protection and overload protection for safety
- Compact design mounts to walls or sits on ground
- Sync with Ring cameras, lights, and select Alexa devices
With the Ring Outdoor Smart Plug, you can easily control outdoor lighting, holiday lights, appliances, and more – no matter where you are. The weather-resistant design ensures it works in any season. Control it manually, by voice, or set schedules for automatic, hands-free control.
The Bosch Platinum Spark Plugs for small engines are designed to deliver quick starts, smooth acceleration, and optimum performance for 2- and 4-cycle small engines. Manufactured by Bosch.
The Bosch Platinum Spark Plugs for Small Engines are specially engineered to meet the needs of 2- and 4-cycle small engines. These premium spark plugs feature:
- Platinum center electrode that is 4x more durable than standard copper plugs for longer service life
- Patented platinum fine wire design for superior performance, efficiency, and durability
- Pure alumina silicate ceramic insulator for increased mechanical strength and heat transfer
- Resists fouling and corrosion for reliable operation even under harsh conditions
The Bosch Platinum small engine spark plugs provide quick starts, smooth acceleration, and peak performance for small engines like lawn mowers, chainsaws, snow blowers, tillers, weed trimmers, and more. Their durable platinum construction ensures an extended service life. Backed by Bosch, these high-quality spark plugs are an excellent choice for all 2- and 4-cycle small engine applications.
The Honda 98079-56846 (BPR6ES) is a high quality small engine spark plug designed for reliable performance in Honda lawn mowers, tillers, and other outdoor power equipment. This spark plug features OEM quality construction for optimal ignition and comes in official Honda packaging.
The Honda 98079-56846 (BPR6ES) small engine spark plug is an excellent replacement part for keeping your Honda engine running smoothly. This spark plug is factory approved and manufactured to Honda’s strict quality standards for optimal durability and performance.
Key Features and Benefits:
- Designed specifically for Honda small engines including GCV160, GCV190 models
- OEM quality ensures precise fit and reliable ignition
- Made in Japan by Honda for optimal durability
- Copper core and nickel alloy components for superior conductivity and corrosion resistance
- Consistent starts and smooth engine performance
- Officially approved and recommended for Honda lawn mowers, tillers, generators
- Comes in Honda packaging for guaranteed authenticity
With genuine OEM construction and materials, the Honda 98079-56846 (BPR6ES) small engine spark plug will keep your Honda engine firing on all cylinders season after season. This high quality spark plug is essential for restoring peak performance and ignition.
The Craftsman CMXGZAM250017 is an RC12YC spark plug compatible with many walk-behind lawn mowers and riding mowers. This replacement spark plug helps engines start easier, ensures proper combustion and performance, and extends engine life.
The Craftsman CMXGZAM250017 RC12YC Spark Plug is an ideal replacement plug for small engines. Craftsman designed this plug for compatibility with many of their walk-behind and riding lawn mowers that originally used an RC12YC plug.
Key features and benefits:
- Compatible with many Briggs & Stratton, Craftsman, and other small engines
- Copper core and nickel alloy terminal provide maximum conductivity
- Helps extend engine life by ensuring proper combustion
- Easy to install with standard spark plug wrench
- Restores starting performance in worn engines
The Craftsman RC12YC spark plug is a high-quality replacement designed to restore performance in small engines. Its copper core and compatible design make it a great choice for many walk-behind and riding mowers.
The MTD mulching plug is an authentic replacement part that fits many popular Cub Cadet, Troy-Bilt, Yard Machines and Craftsman 21-inch walk-behind mowers. This high-quality mulching plug allows you to easily convert your mower for mulching or side discharge mowing.
The MTD Genuine Parts mulching plug is an ideal replacement part for homeowners with 21-inch Cub Cadet, Troy-Bilt, Yard Machines or Craftsman walk-behind mowers. This authentic MTD part converts your mower for mulching or side discharge mowing quickly and easily.
Key Features:
- Fits a wide range of popular 21-inch MTD mower models including Cub Cadet, Troy-Bilt, Yard Machines and Craftsman
- Genuine MTD part ensures proper fit and performance
- Sturdy steel construction with black powder coated finish
- Converts mower for mulching or side discharge mowing
- Easy bolt-on installation takes just minutes
- Enables leaf mulching in fall and grass cycling during mowing season
- Helps fertilize lawn by recycling clippings into the turf
With genuine MTD construction that bolts on in minutes, this mulching plug provides a quick and easy way to convert your 21-inch Cub Cadet, Troy-Bilt or Craftsman mower for mulching or side discharge mowing. It’s built to last and enhances mowing performance season after season.
The NGK BPM8Y is a top-selling spark plug that provides reliable ignition for 2-stroke and 4-stroke small engines. This affordable plug is OEM approved and widely used in outdoor power equipment from brands like Echo, Stihl, and Husqvarna.
The NGK BPM8Y is one of the most popular spark plugs for small engines and outdoor power equipment. This reliable, OEM-approved spark plug provides efficient ignition to get 2-stroke and 4-stroke engines started quickly and running smoothly.
Key Features and Benefits:
- Designed and tested to meet or exceed OEM specifications for proven performance
- Copper core and nickel alloy electrodes deliver reliable sparks for quick, easy starts
- Resists fouling and corrosion for long plug life
- Ideal for Echo trimmers, blowers, chainsaws, and other outdoor power equipment
- Also fits many Stihl, Husqvarna, Briggs & Stratton, Kawasaki, and Honda small engines
- Sold in affordable 2-packs for tune-up convenience
With a copper core for heat dissipation and nickel alloy electrodes to resist wear, the NGK BPM8Y is a high-quality plug that keeps outdoor power equipment running at peak performance. This popular plug offers tune-up value for Echo equipment and most other major 2-stroke and 4-stroke small engine brands.
The Briggs & Stratton spark plug socket wrench is an essential tool for removing and installing spark plugs on small engines. This durable steel wrench fits most Briggs & Stratton engines and other common small engine spark plugs.
The Briggs & Stratton Spark Plug Socket Wrench makes changing spark plugs quick and easy. This heavy-duty wrench features a dual-sized design to fit most small engine spark plugs.
- Fits 13/16″ and 5/8″ spark plugs
- Dual-sided to fit more engines
- Heavy duty steel construction
- Comfort grip handle
- Replaces old Briggs & Stratton part #19374
- Designed to reach plugs in tight engine compartments
With its dual-size and extended length, this spark plug socket wrench can help you easily access and service the spark plugs on Briggs & Stratton engines and other outdoor power equipment. It’s an essential tool to have on hand for small engine maintenance and tune-ups.
The Briggs & Stratton Platinum Spark Plug is an original equipment manufacturer (OEM) replacement part designed to exact specifications for optimal fit and performance. This premium spark plug helps improve starting and fuel efficiency.
The Briggs & Stratton Platinum Spark Plug is an ideal choice when you need to replace the spark plug on your Briggs & Stratton engine. This OEM part ensures proper fit and function to maintain the life of your engine. Key features and benefits include:
- Platinum tip for improved durability and longer life
- Precisely engineered for fast, easy starting
- Helps maximize power and fuel efficiency
- Maintains ignition stability for smooth performance
- OEM replacement for guaranteed fit and reliability
With the Briggs & Stratton Platinum Spark Plug, you can keep your engine running at peak performance. This high-quality spark plug is specially designed to OEM standards for hassle-free installation and operation.
Briggs & Stratton 796112-2pk is a 2 pack of copper spark plugs designed for small engines. These plugs are compatible replacements for many Briggs & Stratton engines.
The Briggs & Stratton 796112-2pk Spark Plug 2 Pack is an ideal spark plug replacement kit for many small engines. These copper core plugs are built to OEM specs and offer reliable performance.
Key Features:
- Set of 2 identical spark plugs for small engines
- Copper core and metal shell construction
- Replaces J19LM, RJ19LM, 802592, 5095K and more
- Ideal for lawn mowers, snow blowers, generators, etc.
- OEM quality and performance
- Long lasting life span
- Easy installation
- Great value 2 pack
The Briggs & Stratton 796112-2pk spark plug kit provides a convenient and cost-effective way to replace old or worn out plugs in your small engine equipment. The copper and metal design offers dependable ignitability and durability. Overall an excellent plug set for DIY tune-ups and maintenance.
