Spark Plugs (424 items found)

Keep your engine running at its best with the right spark plug for the job. Whether you're tuning up your lawn mower before the season starts or maintaining your car or truck, Ace Hardware has the spark plugs, gap tools and accessories you need. Shop brands like Champion and NGK and get helpful advice from our knowledgeable staff.

What Are Spark Plugs Used For?

Spark plugs are a small but essential part of any gas-powered engine. Here's what you need to know.

• Function:Ignites the air-fuel mixture inside the engine cylinder to power combustion and keep your engine running smoothly.
• Applications:Used in cars, trucks, lawn mowers, generators, pressure washers and other small-engine equipment.
• Who needs them:Homeowners, DIYers and auto enthusiasts performing routine engine maintenance.

Worn or faulty spark plugs can cause hard starts, rough idling and reduced fuel efficiency, making timely replacement an important part of regular upkeep.

Types of Spark Plugs at Ace

Ace carries spark plugs for a wide range of engines and applications. Here's a look at what's available.

Lawn Mower Spark Plugs

Lawn mower spark plugs are built for the small 4-stroke engines found in push mowers, riding mowers and outdoor power equipment. Because different mower brands and engine types call for different plugs, always check your owner's manual before buying. Our helpful staff can also point you in the right direction so you leave with exactly what your mower needs.

Automotive Spark Plugs

For cars and trucks, Ace stocks spark plugs in copper, platinum and iridium options to fit a variety of makes and models. Copper plugs are a reliable, budget-friendly option for standard vehicles while platinum and iridium plugs offer longer service life for modern engines.

Always verify fitment with your owner's manual before purchasing. Browse our full selection of auto tools and maintenance products to round out your service kit.

How to Choose the Right Spark Plug

Picking the right spark plug starts with knowing your engine. Keep these factors in mind before you buy.

• Engine compatibility:Match the spark plug to your engine's make, model and manufacturer specifications.
• Heat range:Using the wrong heat range can cause fouling or pre-ignition.
• Gap specification:Most plugs come pre-gapped but should always be verified before installation.
• Material:Copper suits standard engines; platinum and iridium offer longer life for modern vehicles

Spark Plug Gap Tools & Accessories

A spark plug gap tool, also called a spark plug gapper or gap gauge, measures and adjusts the space between a plug's electrodes before installation. Even pre-gapped plugs can shift during shipping, so a quick check before installing can prevent misfires and poor engine performance.

Pair your spark plugs and gap tools with other essentials from our automotive, RV and marine department, including fluids and lubrication, batteries and booster cables and tire maintenance supplies.

Shop Spark Plugs Near You at Ace Hardware

Whether you prefer to shop from home or stop in on the way to the garage, Ace makes it easy. Find spark plugs near you and check local inventory, or shop online for fast shipping and free in-store pickup. When you shop in store, our helpful staff are ready to assist with whatever your next project needs.