NGK TR4 Sytytystulppa

Spark plug for Indmar, OMC and Volvo Penta inboard engines. Thread diameter - 14 mm, Thread length - 18 mm, Gap size - 1 mm, Spark position - 1.25 mm, Spanner size - 16 mm, 1 - Earthed Electrode, Connector Type M4, interference Suppression 5 kOhm, Nickel Middle Electrode.