This piston, referenced OS44503200, fits O.S. Engine FS-200S and FS-200S-P units as a replacement component. It is designed to recover proper compression and support consistent performance in glow-powered RC models.
When an engine shows signs of wear, installing a fresh piston helps reestablish effective ring sealing and cuts down on blow-by that degrades idle and throttle feel. Always pair the piston with the matching cylinder and ring set during overhaul.
Use OS44503200 as the correct replacement part for routine engine servicing or before tuning sessions; verify ring seating and clearance at installation for dependable compression.
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