Spark Plug NGK 5531 / DPR6EA-9
For Mercury / Mariner:
F9.9;F15M;F15E;F25M;F25E;F30EFI;F40E;F50;F60E;F75;F90E;F99E;F115 EFI
Yamaha:
F15A;F20A;F25A;F30A;F40A;F40B;F50A
For Mercury / Mariner:
F9.9;F15M;F15E;F25M;F25E;F30EFI;F40E;F50;F60E;F75;F90E;F99E;F115 EFI
Yamaha:
F15A;F20A;F25A;F30A;F40A;F40B;F50A