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Most new, unused items may be returned within 7 days of delivery, subject to our Returns Policy. A 20% processing/restocking fee may apply for returns that are not the result of our error. Original shipping charges are non-refundable.
If the return is due to our mistake (incorrect or defective item), we will cover the return shipping cost and issue a full refund.
EU customers are entitled to a 14-day cooling-off period in accordance with applicable consumer protection regulations. Certain exclusions may apply.
Refunds are issued after the returned item is received and inspected. Processing times may vary depending on shipping transit and payment provider handling, but most refunds are completed promptly.
To request a return, please contact us at info@jlm-marine.com with your order number for return authorization. For full terms, conditions, and exclusions, please refer to our complete Returns & Refunds Policy page.
This aftermarket exhaust mixing elbow replaces Yanmar Marine reference 119181-13500. It mixes raw cooling water with exhaust gas and routes the mixture away from the engine on compatible Yanmar 4LH-series marine diesels.
Match this part in this order:
1. Original part number on the elbow or parts list
2. Engine model on the engine identification plate
3. Physical form against the product images
Confirm a 3-bolt, 3-hole triangular mounting flange, a side water-injection port, and a beaded discharge outlet before ordering. See the product images for flange orientation and outlet curve. Do not confuse this part with related 4LH elbows that use a different OEM number or discharge size.
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Reference Type | Brand | Part Number | Notes |
|---|---|---|---|
| Primary OEM Reference | Yanmar Marine | 119181-13500 | Replaces OEM mixing elbow |
| Aftermarket | HDI Marine | 3B4 | Aftermarket replacement |
| Aftermarket | Sedilmare | SED3092401 | Aftermarket replacement |
| Aftermarket | Recmar | MAR119181-13500INOX | Aftermarket replacement |
Confirm your engine model and year in the table below. Match the original part number and the physical shape to the product images. Find the model code on the engine identification plate on the engine block or nearby cover—not on an outboard transom bracket.
| Brand | Engine Model |
|---|---|
| Yanmar Marine | 4LH-STE |
| Yanmar Marine | 4LH-DTE |
| Specification | Value |
|---|---|
| Product type | Exhaust mixing elbow |
| Material | 316 stainless steel |
| Mounting flange | 3-bolt, 3-hole triangular mounting flange |
| Water inlet | 1-1/4" (32 mm) side injection port |
| Discharge diameter | 4" (105 mm) beaded outlet |
| Product weight | 8.125 lbs (3.7 kg) |
| Application | Yanmar 4LH-STE / 4LH-DTE marine diesel exhaust mixing |
Allow the engine to cool completely and disconnect the battery before starting work.
Compare the new elbow to the original for the 3-bolt triangular flange pattern, side water-port location, and outlet angle before removing the old part.
Remove the old elbow, clean the manifold mating face, and install a suitable exhaust gasket and fasteners as specified in the engine service manual.
Seat the new elbow on the flange, tighten fasteners evenly to the manufacturer’s torque values, then reconnect the water inlet hose and exhaust hose with secure clamps on the beaded ends.
Reconnect the battery, start the engine, and check for water or exhaust leaks at the flange and hose joints before returning the vessel to service.
Note: Follow the Yanmar service manual for torque and gasket requirements. Professional installation is recommended.
This is an aftermarket replacement manufactured to match the Yanmar 119181-13500 application. It is not a Yanmar factory OEM part.
Do not assume a mounting gasket comes in the box. Plan to use the gasket called out in your engine parts list (commonly Yanmar 119171-13510 or equivalent) unless your order confirmation states otherwise.
Only 4LH-STE and 4LH-DTE are confirmed for this listing. Other 4LH or 4ALH variants may use a different mixing elbow. Match the original OEM number and flange layout before purchasing.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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