Top rated lawn mower spark plugs

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AI-generated summary · updated July 28, 2026 · verify details before purchase.

1. 

   1 Best overall Wetenex

   Champion RC12YC Copper Plus Spark Plug

   ★★★★★4.6/5 $7.99

   Widely compatible with many lawn mower engines, reliable copper core provides good performance and longevity.

   • Widely compatible
   • Good reliability
   • Affordable price

   • Copper wears faster than platinum/iridium

   View on Amazon manufacturer site
2. 

   2 Best for Briggs & Stratton engines Hipa

   NGK BPR6ES Standard Spark Plug

   ★★★★★4.7/5 $7.99

   Excellent build quality and consistent spark; commonly recommended for small engines.

   • Excellent build quality
   • Consistent spark
   • Long-lasting

   View on Amazon manufacturer site
3. 

   3 Best budget pick Rotary

   Autolite 3924 Copper Core Spark Plug

   ★★★★☆4.5/5 $20.24

   Affordable and reliable for most push mowers; copper core ensures good conductivity.

   • Very affordable
   • Good conductivity
   • Reliable performance

   • Short lifespan compared to precious metals

   View on Amazon manufacturer site
4. 

   4 Best for small engines Champion

   Champion RJ19LM Champion Small Engine Spark Plug

   ★★★★☆4.4/5 $6.34

   Designed specifically for lawn mowers and other small engines, dependable starting and smooth idling.

   • Designed for small engines
   • Dependable starting
   • Smooth idle

   • Not suitable for all mower models

   View on Amazon manufacturer site
5. 

   5 Best for Honda engines Hipa

   NGK CR5HS Standard Spark Plug

   ★★★★★4.6/5 $6.99

   Popular choice for Honda mowers; trivalent metal plating for corrosion resistance and longer life.

   • Corrosion resistant
   • Long life
   • Great for Honda engines

   • Higher price point

   View on Amazon manufacturer site
6. 

   6 Best OEM replacement Briggs & Stratton

   Briggs & Stratton 796112S Spark Plug

   ★★★★☆4.5/5 $6.39

   Genuine OEM part for Briggs & Stratton engines, ensures perfect fit and performance.

   • OEM quality
   • Perfect fit
   • Easy installation

   • More expensive than aftermarket

   View on Amazon manufacturer site
7. 

   7 Best for improved fuel efficiency E3

   E3 Spark Plugs E3.36 Lawn and Garden Spark Plug

   ★★★★☆4.3/5 $10.99

   Patented DiamondFire technology provides more complete combustion, improving fuel efficiency and power.

   • Improved fuel efficiency
   • More power
   • DiamondFire technology

   • May not fit all mowers
   • Mixed reviews on longevity

   View on Amazon manufacturer site
8. 8 Best premium pick

   Denso (4504) Iridium TT Spark Plug

   ★★★★★4.7/5 $10-$15

   Iridium tip for extremely long life and consistent performance; twin-tip design reduces voltage requirement.

   • Extremely long life
   • Consistent performance
   • Twin-tip design

   • Expensive
   • Overkill for some mowers

   View on Amazon manufacturer site

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