Description
Technical Overview & Product Details
As a larger-diameter seal, the 24311-001800 is frequently utilized in major engine housings, inspection covers, or primary fluid passages where maintaining a pressurized seal is essential for engine efficiency and cleanliness. The “1A” material specification is designed to provide excellent resistance to compression set, ensuring the seal maintains its shape and tension despite the significant thermal cycling and vibration inherent in marine propulsion.
- Compatible Engine Type: Yanmar marine propulsion and auxiliary engine series.
- Part Number / Designation: 24311-001800 (1A P180).
- Component Type: O-Ring (Large-Diameter Seal).
- Material: Premium-grade synthetic elastomer (optimized for heat, oil, and chemical resistance per Yanmar OEM standards).
- Application: Primary engine housing, large flange, or major fluid circuit interfaces.
Key Features & Performance
- Robust Seal Integrity: Engineered to form a reliable, leak-proof barrier across large surface areas, effectively containing pressurized gases or fluids.
- Compression Recovery: Formulated to resist “flattening” over time, ensuring the O-ring maintains consistent contact pressure even after thousands of hours of operation.
- Vibration Resilience: The material and design are specifically chosen to handle the high-frequency harmonic vibrations of diesel marine engines, preventing seal displacement.
- Chemical Stability: Highly resistant to the harsh environment of an engine room, including exposure to lube oil, fuel vapors, and coolant additives.
Why Source from Heybeli Marine?
A failure of a large-diameter seal can be difficult to access and costly to rectify. Heybeli Marine protects your vessel’s performance with:
- Strict OEM Interchangeability: Our 24311-001800 O-rings meet the precise metallurgical and dimensional standards required for Yanmar diesel engines.
- Global Strategic Logistics: We maintain dedicated inventory of these larger seals, ensuring they are available for your major overhauls and maintenance schedules.
- Quality Assurance: Every large-diameter O-ring is inspected for molding consistency and structural integrity, preventing leaks from the moment of installation.
- Complete Overhaul Support: We supply these primary seals alongside housing gaskets, O-rings, and fastener sets to support comprehensive, reliable engine rebuilds.
Technical Maintenance Note:
Because the 24311-001800 is a larger-diameter seal, proper installation is paramount:
- Uniform Seating: When installing, ensure the O-ring is not stretched unevenly. Avoid “pulling” the ring to make it fit; it should be placed into the groove uniformly around the entire circumference.
- Cleanliness: Ensure the large flange surface and the O-ring groove are perfectly free of carbon, old sealant, or debris. Any obstruction will create a significant leak path on a seal of this size.
- Lubrication: Use a light coat of assembly lubricant or clean engine oil to help the O-ring seat properly into the groove and to allow the mating cover to slide into place without “pinching” or shearing the rubber.
- No Reuse: Large-diameter O-rings are particularly prone to permanent deformation once they have been clamped in place. Never reuse these seals; always install a new one to ensure a reliable, leak-free reassembly.

