It has a 1mm (0.04″) gap and requires a 21mm (13/16″) spanner size.
The BR6HS-10 spark plug is compatible with Yamaha models: F6A, F6B, F8C, FT8D, F8F, FT8G, F9.9F, FT9.9G, F9.9J, and FT9.9L. It is designed with a 0.6mm (0.024″) gap and a socket size of 16mm (5/8″).
The CR6HSB spark plug is compatible with Yamaha outboard models: F2.5B, F4B, F5A, and F6C.