Champion RCJ7Y K369990032 Spark Plug for G380PU G450PU - Zenoah  [K369990032]

Spark plug details and tuning impact

The Zenoah K369990032 Champion RCJ7Y spark plug is supplied as a compact replacement compatible with G380PU, G450PU, G620PU and G800BPU engines and cross-referenced to part number 163073110. It is intended to replace worn plugs that cause inconsistent firing or tuning drift.

The plug provides the electrical spark transfer into the combustion chamber via a nickel alloy electrode. In practical model use it helps maintain reliable ignition timing and gives tuners a stable baseline for idle and throttle adjustments.

Fitting advice: work on a cooled engine, clean the surrounding area to avoid contaminating the cylinder, carefully unthread the old plug to protect the threads, inspect the seat and electrode gap, hand-start and snug the new plug without over-tightening, then re-check ignition and idle. Not intended for use in full-size engines.