This spare piston ring fits 61SH-class model glow engines and is identified by the YSR6201 part number. It is supplied as a single unit to replace rings that have lost sealing performance due to wear.
Role in operation: the ring restores effective piston-to-cylinder contact to curb blow-by and stabilise compression, contributing to smoother running during break-in, servicing, or performance tuning.
Practical fitting notes: always inspect the piston and cylinder bore for scoring, verify clearances, and use light lubrication for initial assembly. Confirm unobstructed piston travel after installation; if alignment or gap seems off, re-check components for damage or contamination.
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