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24-Pack RC12YC Premium Nickel Alloy Spark Plugs - Direct Fit for John Deere M78543 M87543 - OE Equivalent to RC12YC 71G 71 71S

4.7 (3) Write Review
Free shipping on orders over $29.99

$49.99

$ 22 .99 $22.99

In Stock

About this item

  • Premium Nickel Alloy Construction – Built for long-lasting performance, featuring a nickel alloy shell that outperforms copper in high-temperature, corrosive environments. Unlike copper, which may soften or oxidize under prolonged heat, nickel alloy resists thermal degradation and chemical corrosion, maintaining structural integrity even in harsh conditions. This robust design ensures reliable engine starts and consistent power output, making it ideal for lawn mowers, generators, and small engines that require superior durability and extended service life
  • Wide Compatibility – Direct replacement for multiple OEM part numbers:Briggs & Stratton: 491055, 491055S, 491055T, 692051, 792015, 805015, 5066Kohler: 25 132 12-S, 25 132 12-A, 12 132 02-S, 531308128Craftsman/Gravely: 71G,71,71S, 21525900, 21536800, 21534100, Champion RC12YC.Verify your machine’s model/part number for perfect fit
  • 24-Pack Bulk Value – Stock up for seasonal maintenance, repair shops, or fleet use. Bulk packaging saves time and cost, ensuring you always have replacements on hand for peak efficiency
  • Genuine Performance, Easy Installation – Engineered to OEM specs for hassle-free replacement—no modifications needed. The copper-core center electrode leverages copper's superior electrical conductivity (over 40% higher than nickel), enabling faster spark transmission and improved fuel efficiency. While nickel alloy provides structural durability, the copper core optimizes ignition performance, creating a synergistic design that balances longevity with power output
  • Trusted Quality & Support – Backed by proven reliability and rigorous testing. Use Amazon’s “Confirm Fit” tool above to check compatibility instantly. Prioritize engine health with a plug that combines nickel alloy's corrosion resistance and heat tolerance with copper's conductive excellence, delivering sustained performance in demanding conditions


Product Description

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David M Hook
Reviewed in the United States on June 6, 2025
The seamless compatibility of this spark plug with my mower is impressive. It integrates well and provides consistent performance.
Richard M Caldwell
Reviewed in the United States on June 6, 2025
This spark plug has proven its durability. I've used it in all kinds of weather conditions, and it still performs like new.
Dennis M Andrews
Reviewed in the United States on June 6, 2025
This spark plug has truly transformed my old lawn mower. The engine starts up smoothly every time and runs with more power. I'm getting a much cleaner cut across my lawn.
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