We are currently experiencing substantial delays with Hitachi/HiKOKI and Metabo spare parts due to the two brands merging warehouse. At this moment in time we are unable to provide confirmed delivery dates on out of stock parts, for any urgent requirements please contact us prior to ordering.
Genuine Hitachi piston ring (part number 6686121) — direct replacement ring for small two‑stroke brushcutter/strimmer engines. Reliable when worn rings have caused low compression, heavy smoking or loss of power, this precision-formed ring seats into the piston groove to restore cylinder sealing and combustion efficiency.
Example compatible models include Hitachi/Hikoki/Tanaka trim/brushcutter engines such as CG27EASP, CG27EAS, CG27EAP (and CG27EAP2 variants), CH27EPA and related CH/CG 27-series engines
Straightforward to install during a top‑end service — inspect the piston and cylinder for wear, verify ring end‑gap in the bore, and replace the ring as part of a compression restoration service. If you prefer genuine Hitachi parts for repairs, this ring is the direct match for the listed models.
