Description

OEM O-Ring for Yanmar Marine Engines

This genuine Yanmar O-ring is designed for marine engines, providing reliable sealing at various internal and external locations to prevent fluid leaks and maintain proper pressure. Essential for engine service, rebuilds, and seal replacement.

Key Features:

• Genuine OEM O-ring for Yanmar marine engines
• High-quality material resists engine fluids, heat, and pressure
• Prevents fluid leaks and maintains proper sealing
• Manufactured to exact Yanmar specifications
• Essential component for engine service and rebuilds
• Reliable sealing in demanding marine environments
• Proper size and material for marine engine applications
• Resists compression set and deterioration

Function & Importance:

O-rings are critical sealing components used throughout marine engines at various locations including cooling system connections, oil system components, fuel system fittings, and other sealed joints. They provide leak-free seals between mating surfaces, prevent fluids from leaking out, and maintain proper pressure within engine systems. Worn, hardened, or damaged O-rings cause fluid leaks, pressure loss, and potential engine damage.

OEM Quality:

Genuine Yanmar OEM O-rings are manufactured from materials specifically formulated to resist engine fluids (oil, coolant, fuel), heat, and compression set. Using proper OEM O-rings ensures reliable sealing and prevents premature leaks. Generic O-rings may not be compatible with engine fluids or operating temperatures and can cause immediate or delayed leakage.

When to Replace:

O-rings should be replaced during any engine service or repair, whenever components are disassembled, or when addressing fluid leaks. O-rings deteriorate over time due to heat, fluid exposure, and compression, becoming hardened, cracked, or flattened. Always replace O-rings during service – never reuse old O-rings as they will likely leak.

Installation:

Clean O-ring grooves thoroughly before installation. Inspect grooves for damage or sharp edges that could cut the O-ring. Lubricate O-ring with appropriate fluid (oil, coolant, or assembly lube) before installation. Install carefully to avoid twisting, pinching, or cutting the O-ring. Ensure O-ring is properly seated in its groove and not twisted or pinched during assembly.

Service Best Practices:

Always have spare O-rings on hand during engine service. Replace all O-rings whenever components are disassembled, even if they appear undamaged. Use only genuine Yanmar OEM O-rings for critical engine sealing applications. Keep O-rings clean and protected until installation. Follow Yanmar service procedures for proper installation and torque specifications.

Technical Specifications:

• Type: O-ring seal
• Compatible with: Yanmar marine engines
• Part Number: 129672-44150