YR5 V-Power Spark Plug | NGK 7052 Premium NGK spark plugs are known for their reliable performance and superior anti-fouling characteristics. NGK spark plug YR5 Stock number7052 14mm thread size 11.2mm thread length Resistor Tapered seat V-Power Type Gap 0.039 in. (1.0mm) 5/8 in. or 16mm hex Replaces Pleasurecraft Marine RP030003