Yanmar Marine Engine Cooler Gasket - OEM Heat Exchanger Seal
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You have 30 days to request a return. All sale items are final sale.
OEM Cooler Gasket for Yanmar Marine Engines
This genuine Yanmar cooler gasket is designed for marine engine heat exchangers and oil coolers, providing reliable sealing to prevent coolant and oil leaks. Essential for cooling system service, heat exchanger maintenance, and ensuring proper engine temperature control.
Key Features:
- Genuine OEM cooler gasket for Yanmar marine engines
- High-quality material resists coolant, oil, heat, and pressure
- Prevents fluid leaks from heat exchangers and coolers
- Manufactured to exact Yanmar specifications
- Essential for cooling system service and repairs
- Reliable sealing in demanding marine environments
- Precision-cut for proper fit and sealing
- Maintains proper cooling system operation
Function & Importance:
Cooler gaskets seal the mating surfaces of heat exchangers, oil coolers, and other cooling system components. They prevent coolant and oil from leaking while maintaining proper pressure within the cooling system. The gasket must withstand high temperatures, pressure cycling, and exposure to coolant and oil. Worn or damaged cooler gaskets cause fluid leaks, loss of cooling efficiency, and potential engine overheating.
Heat Exchanger Sealing:
Marine engines use heat exchangers (also called oil coolers or aftercoolers) to transfer heat from engine oil or coolant to raw water. These components operate under pressure and temperature cycling, placing demands on gasket materials. Proper gasket sealing is essential to prevent coolant leaks, maintain cooling efficiency, and protect the engine from overheating damage.
OEM Quality:
Genuine Yanmar OEM cooler gaskets are manufactured from materials specifically formulated to resist coolant, oil, heat, and pressure cycling. They are precision-cut to exact dimensions ensuring proper fit and reliable sealing. Using genuine OEM gaskets ensures leak-free operation and maintains proper cooling system function.
When to Replace:
Cooler gaskets should be replaced whenever heat exchangers or coolers are disassembled for service, cleaning, or inspection. Never reuse old gaskets - they compress during initial installation and will not seal properly if reused. Replace gaskets when experiencing coolant or oil leaks from cooler components. Always use new gaskets during any cooling system service.
Installation:
Clean all mating surfaces thoroughly before gasket installation - remove all old gasket material, scale, corrosion, and debris. Inspect surfaces for damage, warping, pitting, or corrosion that could prevent proper sealing. Install gasket dry unless manufacturer specifies sealant. Position gasket carefully and ensure proper alignment. Torque fasteners to Yanmar specifications in proper sequence to ensure even gasket compression.
Service Best Practices:
Always use genuine Yanmar OEM gaskets for cooling system applications. Never reuse old gaskets. Clean mating surfaces thoroughly and inspect for damage. Follow Yanmar torque specifications and tightening sequences. Fill cooling system with proper coolant mixture. Bleed air from cooling system. Check for leaks after installation and initial engine operation.
Technical Specifications:
- Type: Heat exchanger/cooler gasket
- Compatible with: Yanmar marine engines
- Part Number: 129693-44420
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.