8M6000626 881879T11 Oil Pressure Sensor for Mercury | JLM Marine

Oil Pressure Sensor 8M6000626 881879T11 – Fits Mercury Mercruiser Marine Outboards

This oil pressure sensor is designed as a direct replacement for Mercury Mercruiser marine outboards, compatible with both 2-stroke and 4-stroke engines. Engineered to meet OEM specifications, it ensures accurate oil pressure monitoring to protect your engine from damage caused by low oil pressure conditions.

This sensor directly replaces Mercury OEM part numbers 8M6000626, 881879T11, 8M6000623, 8818793, and 8818790, providing broad compatibility across Mercury marine engine models.

• Direct fit for Mercury Mercruiser outboard engines
• Compatible with both 2-stroke and 4-stroke marine applications
• Ensures reliable oil pressure monitoring for engine protection

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

• 1 × Oil Pressure Sensor

Installation Guide

1. Disconnect the battery negative terminal to prevent electrical shorts during installation.
2. Locate the existing oil pressure sensor on your Mercury outboard engine block.
3. Disconnect the electrical connector from the old sensor by pressing the release tab and pulling gently.
4. Using an appropriate wrench or socket, carefully unscrew the old oil pressure sensor counterclockwise.
5. Inspect the mounting threads on the engine block for debris or damage and clean if necessary.
6. Apply a small amount of thread sealant (if recommended by your engine manual) to the new sensor threads.
7. Hand-thread the new oil pressure sensor into the mounting hole clockwise to avoid cross-threading.
8. Tighten the sensor to the manufacturer's specified torque using a torque wrench (typically 10-15 ft-lbs, consult your manual).
9. Reconnect the electrical connector to the new sensor until it clicks into place securely.
10. Reconnect the battery negative terminal.
11. Start the engine and monitor the oil pressure gauge or warning light to confirm proper sensor operation.
12. Check for oil leaks around the sensor mounting area and re-tighten if necessary.

Troubleshooting & FAQ

Q: How do I confirm this sensor fits my Mercury engine?
A: Cross-reference your existing sensor's part number with the numbers listed above (8M6000626, 881879T11, 8M6000623, 8818793, or 8818790). You can also check your engine's parts diagram using the Mercury Parts Catalog link provided in the Compatible Engine Models section.

Q: What are the signs that my oil pressure sensor needs replacement?
A: Common symptoms include erratic oil pressure gauge readings, illuminated oil pressure warning light (even with proper oil levels), no gauge reading at all, or oil leaking from the sensor body. If you experience any of these, inspect and test the sensor.

Q: Can I use this sensor on both 2-stroke and 4-stroke Mercury engines?
A: Yes, this oil pressure sensor is compatible with both 2-stroke and 4-stroke Mercury Mercruiser marine outboards that originally used the referenced OEM part numbers.

Q: Do I need to use thread sealant when installing this sensor?
A: Consult your engine's service manual for specific requirements. Some Mercury applications require a light thread sealant, while others rely on a factory-installed sealing washer or O-ring. Never over-apply sealant as it can contaminate the oil system.

Q: Is this an OEM Mercury part or an aftermarket replacement?
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.