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Cover Gasket – Fits Yanmar 4LH & 6LY Series Marine Engines (Replaces 124610-01862)

Sale price $8.00 Regular price $12.00
Shipping calculated at checkout.

Cover Gasket – Fits Yanmar 4LH & 6LY Series Marine Engines (Replaces 124610-01862) is backordered and will ship as soon as it is back in stock.


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

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This high-quality aftermarket Cover Gasket is engineered for a precise fit on Yanmar Marine 4LH/4LHA and 6LY/6LYM series diesel engines manufactured between approximately 1990 and 2010. It ensures a reliable seal for various engine covers, preventing fluid leaks and maintaining optimal performance.

This part is a direct replacement for OEM part number Yanmar 124610-01862.

  • Engineered for direct placement between mating surfaces without modifications.
  • Constructed from a durable composite fiber-reinforced elastomer with a steel core for longevity.
  • Designed to resist degradation from engine oils, coolants, and saltwater exposure.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand Part Number
Yanmar 124610-01862

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This part is documented to fit the following Yanmar marine engines.

Brand Model Stroke OEM Part No.
Yanmar 4LH-TE 4-Stroke 124610-01862
Yanmar 4LH-HTE 4-Stroke 124610-01862
Yanmar 4LH-HTZ 4-Stroke 124610-01862
Yanmar 4LHA-HTP 4-Stroke 124610-01862
Yanmar 4LHA-HTZE 4-Stroke 124610-01862
Yanmar 4LHA-HTZP 4-Stroke 124610-01862
Yanmar 6LY-UT 4-Stroke 124610-01862
Yanmar 6LY-ST 4-Stroke 124610-01862
Yanmar 6LY-UTZY 4-Stroke 124610-01862
Yanmar 6LY-STZY 4-Stroke 124610-01862
Yanmar 6LY-UTM 4-Stroke 124610-01862
Yanmar 6LY-STM 4-Stroke 124610-01862
Yanmar 6LY-UTE 4-Stroke 124610-01862
Yanmar 6LY-STE 4-Stroke 124610-01862
Yanmar 6LY-WST 4-Stroke 124610-01862
Yanmar 6LY-WSTZY 4-Stroke 124610-01862
Yanmar 6LY-WUT 4-Stroke 124610-01862
Yanmar 6LY-WUTZY 4-Stroke 124610-01862
Yanmar 6LYM-UTE 4-Stroke 124610-01862
Yanmar 6LYM-STE 4-Stroke 124610-01862
Yanmar 6LYM-UTEHD 4-Stroke 124610-01862
Yanmar 6LY2-ST 4-Stroke 124610-01862
Yanmar 6LY2-STVY 4-Stroke 124610-01862
Yanmar 6LY2-STP 4-Stroke 124610-01862
Yanmar 6LY2-A-STP 4-Stroke 124610-01862
Yanmar 6LY2-A-UTP 4-Stroke 124610-01862
Yanmar 6LY2-WDT 4-Stroke 124610-01862
Yanmar 6LY2-WDTZY 4-Stroke 124610-01862
Yanmar 6LY2-WST 4-Stroke 124610-01862
Yanmar 6LYA-STE 4-Stroke 124610-01862
Yanmar 6LYA-STP 4-Stroke 124610-01862
Yanmar 6LYA-UTE 4-Stroke 124610-01862

Technical Specs

Product Type
Cover Gasket
Installation
Direct placement between mating surfaces
Material
Composite fiber-reinforced elastomer with steel core
Compatibility
Yanmar 4LH, 4LHA, 6LY, 6LYM series engines
Dimensions
12.5" L x 10.0" W x 0.1" H
Thickness
1.5 mm (compressed)
Temperature Rating
-40°C to 200°C (-40°F to 392°F)
Fluid Resistance
Withstands engine oils, coolants, and saltwater exposure
OEM Part Number
124610-01862
Aftermarket Part Number
REC124610-01862

What’s in the Box

  • 1 x Cover Gasket (124610-01862)

Installation Notes

  1. Ensure the engine is off, cool, and the battery is disconnected.
  2. Drain necessary fluids (oil or coolant) to a level below the cover you are servicing.
  3. Carefully remove any components obstructing access, then unbolt and remove the cover.
  4. Remove the old gasket. Thoroughly clean both the cover and the engine mating surfaces. Ensure they are completely free of old gasket material, sealant, oil, and debris.
  5. Position the new gasket correctly. It is designed for a dry installation; do not use sealant unless explicitly required by the manufacturer's service manual.
  6. Reinstall the cover and tighten the bolts in the sequence and to the torque specified by the engine manufacturer to ensure even pressure.
  7. Refill the fluids to the appropriate levels.
  8. Reconnect the battery, start the engine, and carefully check for any leaks as it comes up to operating temperature.

Troubleshooting & FAQ

How do I know if this gasket will fit my engine?

This gasket is made for Yanmar 4LH and 6LY series engines. To ensure a perfect match, compare your engine model against the detailed compatibility list on this page and verify the part number.

What are the signs of a failing cover gasket?

Common signs include visible fluid leaks (oil or coolant) around the cover's sealing edge, engine overheating, or a drop in fluid levels without an obvious cause. A clean engine bay makes these symptoms easier to spot.

Do I need to apply sealant to this gasket?

No, this gasket is designed for a dry-fit installation. Applying sealants can interfere with its ability to seal properly and may lead to premature failure.

When should this gasket be replaced?

Gaskets are single-use components and should be replaced any time the part they seal is removed for service or repair. They do not have a scheduled replacement interval otherwise.

OEM vs. Aftermarket?

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.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

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.

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