CMR7H Tuning Spark Plug.
Especially suitable for models where 40 mm installation is essential.
The CMR7H is extremely suitable for all kind of motors. The sharpened tip gives better access to the gases.
Dimensions:
- Mounting thread: M10 x 1
- Shaft lenght: 15 mm
- Total length: 55 mm
- Total length after assembly: 40 mm
Suitable for Zenoah, Chung Yang, Feulie, Dynamic and similar engines with a M10 threaded spark plug.
Cleaning a spark plug is best done with a hard (tooth) brush with some brake cleaner or petrol, never use a steel wire brush!
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