Review on NGK BM4A SOLID Standard Spark by Ismael Hennigan
Fits old Honda HR17 lawnmowers
The additional P/N (4000) is important as there is another connector with the same BM4A. The other spark plug has a longer insulator and should not be confused with the 4000 as it can damage the engine piston. The NGK website contains detailed P/N lists for all engine and lawnmower models.
Pros
- Performance parts and accessories
Cons
- Can't remember
