Description
250057 O‑Ring – DIN 3771‑18×2.5 – FPM 75 – Rotax Exhaust Systems
Precision-engineered to the DIN 3771‑18×2.5 standard and moulded from FPM (Viton®) with 75 Shore A hardness, this genuine Rotax part 250057 is the critical seal used in the exhaust port assembly of Rotax 912-series engines—including 912, 912S, 912iS, 914, 915iS, and 916iS.
✅ Key Features
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Exact fit: Manufactured to DIN 3771 spec for reliable and leak-proof sealing
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Premium material (FPM/Viton® 75A): Offers top-tier resistance to high temperatures, oil, fuel, and exhaust gases
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OEM quality: Genuine Rotax part—ensures compliance with factory tolerances and durability
Technical Specifications
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Part Number: 250057
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Standard: DIN 3771‑18×2.5 (18 mm inner diameter × 2.5 mm cross-section)
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Compound: FPM (fluoroelastomer), 75 Shore A — ideal for extreme environments
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Application Area: Exhaust flange seals and exhaust temperature sensor interfaces on Rotax 912 series
️ Applications & Fitment
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Essential for maintaining exhaust integrity in Rotax 912, 912S, 912iS, 914, 915iS, and 916iS engines
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Ensures leak-free, high-temperature sealing in the exhaust manifold or flange assembly
In the Box
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1x Rotax 250057 FPM 75 O‑Ring, ready for immediate installation
