NGK B7HS-10 火花塞 雅马哈船外机二冲程专用 独立包装

NGK B7HS-10 spark plug designed for Yamaha outboard two-stroke engines, individually packaged, directly replacing factory B7HS-10; suitable for most Yamaha 2-stroke outboards manufactured after 2000. It ignites the fuel-air mixture for stable power output, especially for long-duration high RPM operation. Replacing resolves starting difficulties, rough idle, or weak acceleration. If electrode fouling, ceramic cracking or misfiring occurs, the plug is aged and should be replaced to prevent fuel economy loss or engine vibration.