What Is The Best Spark Plug For Small Engines?
What Is The Best Spark Plug For Small Engines? Denso (4504) PK20TT. NGK 3403 G-Power. ACDelco 41-962. NGK Iridium IX. ACDelco 9748RR Wires. What spark plug gives the most horsepower? Denso (4504) PK20TT. NGK 3403 G-Power. ACDelco 41-962. NGK Iridium IX. ACDelco 9748RR Wires. How do I choose a spark plug for my lawn mower?