OS Engines O-Ring (S) 10D/10F/1H-3H/20E/40B/40J

The OS Engines O-RING (S) is a small replacement seal identified by part number SCH-OS22781800. It is intended as a service item for OS Engines powerplants referenced in the product name, helping to restore a reliable seal during routine maintenance.

Compact and straightforward to fit, this O-ring is useful to keep on hand when refreshing wear-prone seals on OS Engines models. Using the correct part number helps ensure you have the right size and profile for your engine.

Suggested Compatibility

• OS 10D
• OS 10F
• OS 1H–3H
• OS 20E
• OS 40B
• OS 40J

Suggested compatibility is based on the product naming. Please refer to your engine’s manual or parts list to confirm suitability before installation.