Description
Technical Overview & Product Details
G-series O-rings are specialized for static sealing, where they must maintain a perfect barrier despite the high-pressure pulses, thermal expansion, and mechanical vibrations inherent in large marine diesel engines. The 24321-000800 is engineered to provide the structural reliability needed at major component junctions to prevent fluid migration and pressure loss.
- Compatible Engine Type: Yanmar marine propulsion and auxiliary engine series.
- Part Number / Designation: 24321-000800 (1A G80).
- Component Type: O-Ring (G-Series / Stationary Seal).
- Material: High-performance synthetic elastomer (1A grade, heat- and chemical-resistant).
- Application: Primary flange sealing, large housing joints, and stationary fluid interfaces.
Key Features & Performance
- Static Sealing Excellence: Optimized for “G-series” applications, providing superior performance in fixed flanges and housings where consistent contact pressure is vital.
- High-Compression Integrity: Formulated to maintain its shape and sealing force under the high static loads experienced in major engine housing joints.
- Chemical & Thermal Resistance: The 1A compound is built to resist degradation, swelling, or hardening when exposed to harsh marine environments, including diesel fuel, hot lubricating oils, and coolant additives.
- JIS Precision: Manufactured to exact JIS G-series dimensions, ensuring the seal fits the groove perfectly, providing a secure, leak-proof interface without premature fatigue.
Why Source from Heybeli Marine?
A leak at a major engine joint can lead to significant fluid loss and contamination of the engine room. Heybeli Marine protects your vessel’s performance with:
- Strict OEM Interchangeability: Our 24321-000800 seals are manufactured to meet the precise material hardness and dimensional tolerances required for Yanmar diesel engines.
- Global Strategic Logistics: We maintain a dedicated inventory of large G-series seals, ensuring they are available for your major overhauls and maintenance schedules.
- Quality Assurance: Each O-ring is inspected for structural consistency and surface finish, ensuring it is free from molding flaws that could compromise a critical seal.
- Complete Overhaul Support: We supply these primary G-series seals alongside all necessary gaskets, fasteners, and related hardware to facilitate a professional, leak-free engine assembly.
Technical Maintenance Note:
Because G-series seals are used in critical, larger-diameter joints, proper installation is paramount:
- Mating Surface Inspection: Before installing the 24321-000800, inspect both mating surfaces. They must be clean, smooth, and free of old gasket debris, burrs, or oxidation.
- Uniform Tightening: When securing the housing or flange, use a cross-pattern tightening sequence and follow the manufacturer’s specific torque requirements. This ensures the O-ring is compressed uniformly across its entire circumference.
- Installation Lubrication: A thin, uniform coat of clean engine oil on the O-ring helps it seat properly during the initial clamping phase and prevents it from being pinched.
- No Reuse: Once a G-series O-ring has been compressed in a stationary joint, it develops a permanent “set” or deformation. Always install a new O-ring whenever a component is disassembled to guarantee future seal integrity.

