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RM Spark Plugs


The spark plugs originally specified have not been available for many years. Recent equivalents are listed below with those most commonly available being highlighted.

1 litre - L10S Equivalents
Champion: L85, L7, L6G, L82C, L85C
Lodge: HN,
KLG: F75
Bosch: W175T1, W7AC, W7A,
NGK: B6HS, B6HV
Motorcraft/ Autolite: AE3,
AC: 43F, 43FF, 425Z

2 litre - NA8 Equivalents
Champion: NA8, N5C, N5
KLG: GE50, FE70
Lodge: HBLN, CLNH
Bosch: W7DC
NGK: B6ES


Each manufacture has his own code and an explanation of these codes can be found here