Inlet Manifold Gasket – Fits Yanmar 4JH Series Marine Diesel Engines (Replaces 129470-12130)
Inlet Manifold Gasket – Fits Yanmar 4JH Series Marine Diesel Engines (Replaces 129470-12130) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Inlet Manifold Gasket – Fits Yanmar 4JH Series Marine Diesel Engine...
Product Details
This Inlet Manifold Gasket – Fits Yanmar 4JH Series Marine Diesel Engines (Replaces 129470-12130) is engineered for a precise seal on Yanmar 4JH, 4JH2, 4JH3, 4JH4, 4JH5, and 4LH series diesel engines. It ensures compatibility with a wide range of marine engine models from the 4JH family, including 4JH-HTBE, 4JH-TE, 4JH3-DTE, 4JH4-DTE, and 4JH5E.
This part serves as a direct cross-reference for Yanmar OEM part number 129470-12130, ensuring reliable fitment and function.
- Installation: Mounts on the surface between the inlet manifold and the engine block.
- Fuel Type: Designed exclusively for diesel engines.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yanmar | 129470-12130 |
Engine & Model Compatibility
Confirm your engine model in the table below. This gasket fits a broad range of Yanmar marine and industrial diesel engines.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Yanmar | 4JH-HTBE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH-TE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH110 | 110 | 4-Stroke | 129470-12130 | |
| Yanmar | 4JH2 | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH3-DTE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH3-HTE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH3-TE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH3E | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH4-DTE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH45 | 45 | 4-Stroke | 129470-12130 | |
| Yanmar | 4JH4AE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH4E | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH57 | 57 | 4-Stroke | 129470-12130 | |
| Yanmar | 4JH5E | 53 | 4-Stroke | 129470-12130 | |
| Yanmar | 4JH80 | 80 | 4-Stroke | 129470-12130 | |
| Yanmar | 4LH-DTE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4LHA-DTP | 4-Stroke | 129470-12130 | ||
| Yanmar | 4LHA-HTP | 4-Stroke | 129470-12130 | ||
| Yanmar | 4LHA-STP | 4-Stroke | 129470-12130 | ||
| Yanmar | 4LV150 | 150 | 4-Stroke | 129470-12130 | |
| Yanmar | 4LV195 | 195 | 4-Stroke | 129470-12130 | |
| Yanmar | 4LV230 | 230 | 4-Stroke | 129470-12130 | |
| Yanmar | 4LV250 | 250 | 4-Stroke | 129470-12130 | |
| Yanmar | 4YB180 | 180 | 4-Stroke | 129470-12130 | |
| Yanmar | 4THE88M | 4-Stroke | 129470-12130 | Industrial model | |
| Yanmar | 4TNE84NT | 4-Stroke | 129470-12130 | Industrial model | |
| Yanmar | 4JH2LHTE | 4-Stroke | 129470-12130 | ||
| Yanmar | 4JH2LTE | 4-Stroke | 129470-12130 |
Technical Specs
- Product Type
- Intake/Inlet Manifold Gasket
- Installation
- Surface mount between inlet manifold and engine block
- Fuel Type
- Diesel
- Dimensions
- 37.0" L x 6.0" W x 0.1" H
What’s in the Box
- 1 x Inlet Manifold Gasket (129470-12130)
Installation Notes
- Ensure the engine is completely cool and disconnect the battery.
- Drain coolant to a level below the inlet manifold to prevent spills.
- Remove any components obstructing access to the manifold.
- Carefully unbolt and detach the inlet manifold from the engine block.
- Remove the old gasket and thoroughly clean both mating surfaces. Ensure they are free of old gasket material, sealant, and debris.
- Position the new gasket correctly, aligning it with the bolt holes. Do not use sealant unless specified by the engine manufacturer.
- Reinstall the inlet manifold, tightening the bolts in the sequence and to the torque values specified in your engine's service manual.
- Reconnect all hoses, sensors, and other components.
- Refill the cooling system, then reconnect the battery.
- Start the engine and carefully inspect for any coolant or air leaks around the manifold.
Troubleshooting & FAQ
How can I tell if my inlet manifold gasket is leaking?
Signs of a failing gasket include visible coolant leaks around the manifold, engine overheating, rough idling or misfires, reduced engine performance, and a distinct sweet smell from burning coolant.
Is this gasket compatible with the Yanmar 4JH5E engine?
Yes, this gasket is fully compatible with the Yanmar 4JH5E model, as well as many other engines in the 4JH and 4LH series. To be certain, always verify that your original part number is 129470-12130.
What are the signs of a vacuum leak from a bad gasket?
A vacuum leak caused by a faulty inlet gasket can lead to a high or fluctuating idle, a whistling or hissing sound from the engine bay, a check engine light (with lean fuel mixture codes), and a general loss of power.
Do I need to use sealant with this gasket?
Most modern gaskets like this one are designed to be installed dry without any additional sealant. Applying sealant can sometimes interfere with a proper seal. Always follow the recommendations in your engine's official service manual.
What's the difference between OEM and this aftermarket part?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
