spark plug cross reference (2024)

FAQs

Is it okay to cross reference spark plugs? ›

Precautions for cross reference and product tables listing other manufacturer's spark plugs: Use for reference only. Table does not guarantee the performance of spark plugs when installed in the vehicles even plug was specified in cross references.

Autolite 3923-3926 (maybe more) are listed as equivalent to the Champion and NGK. I had the the exact same Champion RC12YC in my supercharged 360 (Dakota) and then switched to the Autolite 3923 which have a cooler heat range for boosted or sprayed motors.

To find the recommended spark plugs for your vehicle or machine, check your owner's manual. If your owner's manual specifies iridium spark plugs, don't downgrade to platinum spark plugs or copper spark plugs; if you downgrade, you run the risk of poor engine performance.

The spark plug size must match the cylinder bore diameter of your engine, or else it won't create a proper spark. Additionally, spark gap should be set according to your engine manufacturer's specifications. Choosing spark plugs that don't meet these criteria can lead to misfires and other performance issues.

Not always. In the past, it was necessary to gap spark plugs, but today spark plugs are usually pre-gapped. It is advisable to double check that the gap is correctly set to the vehicle's recommended setting when installing spark plugs.

A: Yes, the NGK BCPR5ES spark plug is a suitable replacement for the Champion RC12YC spark plug in a Toro lawn mower with a Briggs & Stratton engine. The NGK BCPR5ES spark plug is compatible with various small engines, including the Briggs & Stratton 150cc 6.25hp engine commonly found in lawn mowers.

The most common signs of bad spark plugs include start-up trouble, rough idling, sluggish acceleration, declining fuel economy, engine misfiring, and engine knocking.

The most important detail in a spark plug is matching your engine's design. Copper has high conductivity and low price, but also a shorter lifespan. Harder platinum and iridium cost more, but were designed to last longer, but remember, the best fit is always the one designed for your engine.

If none of the previous issues are forcing you to replace your spark plugs, you can typically change them every 30,000 to 90,000 miles depending on the make and model of your car. Your owner's manual reveals the schedule of your vehicle.

While you should acquire matching sets of spark plugs for your car, not all are universal. Spark plugs are available in several sizes and spacing, and are made from various metals. There are huge differences between spark plugs depending on the engine type.

What are the best spark plugs for older engines? ›

Copper spark plugs run cooler and provide more power in performance driving situations. They are often installed as original equipment in turbocharged engines and engines with higher compression ratios. Copper spark plugs are also often used in older (pre-1980s) vehicles with a distributor-based ignition system.

The rule of thumb for the spark plug gap on older engines is coil ignition 0.025 thou and magneto ignition 0.018 - 0.020 thou.

Spark plugs aren't universal; you have to make sure that you buy one that fits your mower. You can consult your owners' manual to determine the types your lawn mower can use or take a look at the plug's ceramic insulator, which usually has the number printed on it.

The most important detail in a spark plug is matching your engine's design. Copper has high conductivity and low price, but also a shorter lifespan. Harder platinum and iridium cost more, but were designed to last longer, but remember, the best fit is always the one designed for your engine.

If you put the wire for, say, spark plug 1 onto the top of spark plug 4, spark plug 4 is now going to fire at the wrong time. If it fires when the intake valve is open, it could set fire to the fuel-and-air mixture that's waiting in the intake manifold and the throttle body.

While you should acquire matching sets of spark plugs for your car, not all are universal. Spark plugs are available in several sizes and spacing, and are made from various metals. There are huge differences between spark plugs depending on the engine type.

Spark plugs fire in a specific order, and crossing a wire to the wrong plug will make the engine run rough or not at all and can cause damage to your engine.