Description
Heavy-Duty Rear Main Seal for Yanmar Marine Diesels
The REC124411-01780 is an OEM-equivalent crankshaft rear seal designed for Yanmar 4LH and 6LY series marine engines, providing superior oil containment for high-performance diesels.
✔ Key Features
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Direct OEM Replacement: Matches Yanmar #124411-01780 specifications
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Marine-Grade Materials: Viton® sealing lip with stainless steel garter spring
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Triple-Lip Design: Enhanced protection against oil leaks
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Corrosion-Resistant: Special coating for saltwater protection
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High-Temp Stability: Withstands continuous operation up to 150°C
🔧 Compatible Yanmar Models
4LH Series:
4LH-DTE/-DTZ/-HT/-HTE/-HTZ/-HTZAY
4LH-ST/-STE/-STZ/-STZAY/-TE/-UT/-UTZ/-UTZAY/-WST/-WSTZY
4LHA-DTE/-DTP/-DTZE/-DTZP/-HTE/-HTP/-HTZE/-HTZP/-STE/-STP/-STZE/-STZP
6LY Series:
6LY-ST/-STE/-STM/-STZY/-UT/-UTE/-UTM/-UTZY/-WST/-WSTZY/-WUT/-WUTZY
6LY2-ST/-STE/-STP/-STVY/-WDTZY/-WST
6LY2A-STE/-STP/-UTP
6LY2M-WDT/-WST
6LY3-ETP/-STP/-UTP
6LYA-STE/-STP/-UTE
6LYM-STE/-UTE/-UTEHD
⚙ Technical Specifications
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Part #: REC124411-01780
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Seal Type: Radial shaft seal
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Material: Viton® rubber with stainless steel spring
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Dimensions: [Include OD/ID/Width if available]
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Weight: 0.07 kg
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Package Size: 11.5 × 11.5 × 1.5 cm
🛠 Installation Notes
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Clean crankshaft surface thoroughly (use Scotch-Brite™ if scored)
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Lubricate seal lip with clean engine oil before installation
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Use proper seal driver tool (Yanmar SST-009 recommended)
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Replace wear sleeve if present (check part #124411-01781)