NGK CMR6H Spark Plug for Zenoah G230RC G240RC G260RC G270RC G290RC G231PUM G260PUM G290PUM - Zenoah K369991975  [K369991975]

NGK CMR6H spark plug compatible with Zenoah engines

This replacement spark plug fits Zenoah two-stroke RC engine models listed in the product name and uses the NGK CMR6H designation shown by the original manufacturer. It is an RC-scale ignition component intended as a direct-service part for glow engines used in model cars and similar hobby platforms.

Use this plug when restoring firing reliability after fouling or when replacing worn ignition parts during routine engine maintenance. The item is a like-for-like replacement option that preserves the original NGK CMR6H reference within Zenoah service lists.

Role in tuning and engine setup

Fit the new plug with the engine cold, protecting the insulator with an appropriate socket and starting the thread by hand to prevent damage. Seat the plug without excessive force, then recheck idle and full throttle response while making incremental needle-valve adjustments. Frequent visual checks of the insulator and electrode help determine correct mixture and identify overheating or fouling.

• Compatibility: Matches the listed Zenoah engine model codes in the product name.
• Service tip: Replace when electrode wear or persistent fouling affects ignition.
• Tuning role: Maintains consistent ignition for needle-valve and timing adjustments.