8M0204693 830749 Drain Screw Seal Washer for Mercury MerCruiser | JLM Marine

Drain Screw Seal Washer – Fits Mercury MerCruiser Engines

This high-quality aftermarket drain screw seal washer is designed to fit a wide range of Mercury MerCruiser marine engines. Engineered to meet OEM specifications, this yellow seal washer ensures a reliable, leak-free seal for drain screws during routine maintenance and oil changes.

This part directly replaces Mercury Marine/MerCruiser part numbers 26-8M0204693, 26-830749, 8M007119, and 830749, providing a cost-effective solution for your engine service needs.

• Package includes 4 seal washers for multiple services
• Compatible with Mercury MerCruiser marine engines
• Part of the 47-43026Q06 impeller repair kit assembly

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

Quantity: 4 Drain Screw Seal Washers (Yellow)

Installation Guide

1. Ensure the engine is off and cool before beginning any maintenance work.
2. Locate the drain screw on your Mercury MerCruiser engine that requires service.
3. Remove the old drain screw and inspect the existing seal washer for wear or damage.
4. Clean the drain screw and the sealing surface thoroughly to remove any debris or old seal material.
5. Place one new yellow seal washer onto the drain screw threads.
6. Thread the drain screw back into position by hand to avoid cross-threading.
7. Tighten the drain screw to the manufacturer's specified torque using a torque wrench. Do not over-tighten, as this may damage the seal or threads.
8. Check for leaks after refilling with oil or completing the service procedure.

Troubleshooting & FAQ

Q: How do I confirm this fits my Mercury MerCruiser engine?
A: Cross-reference the part numbers 26-8M0204693, 26-830749, 8M007119, or 830749 with your engine's service manual or parts diagram. You can also use the Mercury Parts Catalog link provided above to verify compatibility.

Q: How often should I replace the drain screw seal washer?
A: It is recommended to replace the seal washer every time you remove the drain screw during oil changes or maintenance to ensure a proper, leak-free seal and prevent future oil leaks.

Q: Can I reuse the old seal washer?
A: No, reusing old seal washers is not recommended. Once compressed, these washers lose their sealing ability and may result in oil leaks. Always install a new washer during each service.

Q: What are the signs that my drain screw seal washer needs replacement?
A: Visible oil seepage around the drain screw, crushed or flattened washers, cracks, or hardening of the seal material are all indicators that the washer should be replaced immediately.

Q: Is this an OEM part or aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.