8M0065179 65W-46241-00 Timing Belt for Mercury | JLM Marine

Timing Belt for Mercury 25-60 HP EFI 4-Stroke Outboards

This high-quality aftermarket timing belt is engineered to fit Mercury 4-stroke EFI outboard engines ranging from 25 HP to 60 HP. Designed to meet OEM specifications, it ensures reliable engine timing and performance across a wide range of Mercury models.

This timing belt directly replaces OEM part numbers 8M0065179, 8M0151040, and 65W-46241-00, providing a cost-effective solution for routine maintenance and repairs.

• Compatible with Mercury 25, 30, 35, 40, 45, 50, 55, and 60 HP 4-stroke EFI engines
• Direct OEM replacement for multiple part numbers
• Lightweight design (57g) for easy installation

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

This package includes the following component:

• 1 × Outboard Motor Timing Belt

The package contains all the parts shown in the picture.

Installation Guide

1. Disconnect the battery and ensure the engine is completely cool before beginning work.
2. Remove the engine cowling and any components obstructing access to the timing belt cover.
3. Take off the timing belt cover by removing the retaining bolts. Keep all hardware organized for reassembly.
4. Rotate the crankshaft to align the timing marks on the camshaft and crankshaft pulleys to the TDC (Top Dead Center) position.
5. Loosen the timing belt tensioner and carefully remove the old timing belt from the pulleys.
6. Inspect the pulleys, tensioner, and idler for wear or damage; replace if necessary.
7. Install the new timing belt around the crankshaft pulley first, then route it around the camshaft pulley and tensioner following the correct path.
8. Ensure the timing marks remain aligned throughout installation. Do not force the belt onto the pulleys.
9. Adjust the tensioner to the manufacturer's specified tension, then tighten the tensioner bolt securely.
10. Manually rotate the crankshaft two full revolutions and recheck that all timing marks are still properly aligned.
11. Reinstall the timing belt cover, engine components, and cowling in reverse order of removal.
12. Reconnect the battery, start the engine, and verify smooth operation without unusual noise or vibration.

Troubleshooting & FAQ

Q: How do I confirm this timing belt fits my Mercury engine?
A: Cross-reference your engine's HP rating and model year with the compatibility table above. Verify your original part number matches 8M0065179, 8M0151040, or 65W-46241-00. If you're unsure, consult your engine's service manual or contact our support team.

Q: How often should I replace the timing belt on my Mercury outboard?
A: Mercury typically recommends timing belt replacement every 3 years or 300 operating hours, whichever comes first. Always consult your owner's manual for the manufacturer's specific maintenance schedule for your engine model.

Q: What are the signs that my timing belt needs replacement?
A: Common symptoms include visible cracking or fraying of the belt, engine misfires, rough idling, difficulty starting, or unusual ticking/squealing noises from the timing area. If you notice any of these signs, inspect and replace the belt immediately to prevent engine damage.

Q: Can I install this timing belt myself or do I need a mechanic?
A: While experienced DIYers with proper tools can perform this replacement, timing belt installation requires precise alignment of timing marks and correct tensioning. Incorrect installation can cause severe engine damage, so professional installation is recommended unless you have experience with marine engine timing systems.

Q: Is this an OEM 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.