Gasket Set – Fits Yanmar 3JH3E-YEU Marine Engines (Replaces 729270-92601)
Gasket Set – Fits Yanmar 3JH3E-YEU Marine Engines (Replaces 729270-92601) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This complete Gasket Set for Yanmar 3JH3E-YEU Marine Engines provides all necessary components for a full engine overhaul or major service. It is designed to fit the 40 HP, 3-cylinder, 4-stroke Yanmar 3JH3E-YEU marine diesel engine, ensuring a precise, factory-grade seal.
This kit serves as a direct replacement for Yanmar part number 729270-92601 and other equivalent references.
- Engineered for complete diesel engine overhaul and maintenance.
- Manufactured from high-quality gasket materials to meet or exceed OEM specifications.
- Provides a reliable seal for critical engine components.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket providers.
| Brand | Part Number |
|---|---|
| Yanmar | 729270-92601 |
| Aftermarket | REC729270-92601 |
Engine & Model Compatibility
Confirm your engine model in the table below.
Yanmar Marine Engines
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yanmar | 3JH3E-YEU | 40 | 4-Stroke | 729270-92601 | Marine diesel engine |
Technical Specs
- Product Type
- Complete Engine Gasket Set
- Application
- Engine overhaul and maintenance
- Fuel Type
- Diesel
- Housing Material
- High-quality gasket materials
- Dimensions
- 37.0 cm (L) × 21.0 cm (W) × 1.5 cm (H)
- Weight
- 0.18 kg (0.4 lb)
- Manufacturing
- Manufactured to OEM specifications and standards
What’s in the Box
This complete kit includes all necessary gaskets and seals for a typical engine rebuild, including:
- Head Gasket
- Additional gaskets and seals for a complete overhaul
Installation Notes
For a successful installation, follow the engine manufacturer's service manual. Generic steps include:
- Ensure all mating surfaces are meticulously clean, dry, and free of old gasket material, oil, or imperfections.
- Inspect components like the cylinder head and block for warping with a straightedge before assembly.
- Place gaskets correctly, ensuring all bolt holes and fluid passages are properly aligned.
- Tighten all bolts and fasteners in the sequence and to the torque specifications recommended in your Yanmar service manual. Over-tightening or uneven tightening can cause leaks.
- After reassembly, run the engine to operating temperature and check thoroughly for any fuel, oil, or coolant leaks.
Troubleshooting & FAQ
How do I know if this gasket set fits my engine?
This set is specifically for the Yanmar 3JH3E-YEU model. The most reliable way to confirm fitment is by matching the OEM part number 729270-92601 to your engine's service manual or existing parts. Do not rely on engine horsepower or visual comparison alone.
What are the signs of a failing head gasket?
Common symptoms include engine overheating, loss of power, white smoke from the exhaust (coolant burning), or a milky appearance in the engine oil (oil and coolant mixing). Any of these signs warrant an immediate inspection to prevent further engine damage.
Can I reuse any of my old gaskets?
No. Gaskets are designed for one-time use. They deform under pressure to create a seal and will not provide a reliable seal if reused, leading to leaks and potential engine damage.
Is any sealant required with these gaskets?
Most modern gaskets are designed to be installed dry. However, always refer to your Yanmar service manual. It will specify if a sealant is required for particular locations.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9001 certified facility and are batch-inspected for quality and consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model is listed as compatible—do not order.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is strongly recommended for safety, performance, and to prevent damage to your engine.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world performance.
- Fast Global Fulfillment — With free standard delivery to most regions, you can expect your parts in 5–15 days.
- Manufacturer-Direct Value — We offer fair pricing by removing intermediaries, without ever compromising on materials or quality control.
Payment & Security
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