The Zenoah K207098100 is supplied as the NGK CR8HVX platinum electrode spark plug for use on Zenoah G-series model engines. It is offered as an RC engine replacement for the listed G230RC, G240RC, G260RC, G270RC and G290RC units, intended to support ignition reliability.
This plug is fitted when a plug is fouled, damaged, or suspected as part of an ignition issue on a model engine. Swapping to a fresh NGK CR8HVX can help narrow down cause when diagnosing running problems.
To install: access the cylinder head, remove the existing plug, clean the thread and seat area, then fit the NGK CR8HVX with the correct plug wrench. Tighten per the engine manufacturer's instructions and confirm correct seating on a test run.
Regular inspection after hard running is advised; replace the plug if heavy carbon build-up, cracking, or other damage appears. The item is intended strictly as an RC accessory for the listed G-series engines.
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