Yanmar Gasket 123678-55850 - OEM Engine Gasket
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Genuine OEM Yanmar gasket (part number 123678-55850) designed to provide a reliable seal for your engine's cover components. This factory-spec gasket ensures proper sealing, preventing oil and fluid leaks while maintaining optimal engine performance.
Key Features:
- Genuine Yanmar OEM part - exact fit and performance
- Part Number: 123678-55850
- Precision-cut to exact OEM specifications
- High-quality gasket material resists heat and fluids
- Prevents oil and coolant leaks
- Essential for proper engine sealing
- Direct replacement for worn or damaged gaskets
Maintenance & Replacement:
Gaskets should be replaced whenever covers are removed for service or repair. Never reuse old gaskets as they compress and lose their sealing ability once installed. Always replace gaskets during routine maintenance, repairs, or component replacement to ensure proper sealing and prevent leaks.
Installation Tips:
Clean all mating surfaces thoroughly before installing the new gasket. Remove all traces of old gasket material and ensure surfaces are clean, dry, and free of oil. Install the gasket dry unless your service manual specifies otherwise. Torque cover bolts to manufacturer specifications in the proper sequence to ensure even compression and a leak-free seal.
Compatibility:
Verify this part number matches your engine's requirements before ordering. Consult your Yanmar engine manual or parts diagram for your specific model, or contact technical support if you need assistance confirming compatibility.
Keep your Yanmar diesel engine sealed and leak-free with this genuine OEM gasket. Stock spares for routine maintenance and unexpected repairs.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.