6C5-46241-00 Timing Belt for Yamaha F25D F30B F40F F50F F50H F60C F60F F70A FT25F FT50G FT50J FT60D FT60G | JLM Marine

Timing Belt for Yamaha F25D F30B F40F F50F F50H F60C F60F F70A FT25F FT50G FT50J FT60D FT60G

This high-quality aftermarket timing belt (also known as a cambelt) is designed to fit a wide range of Yamaha 4-stroke outboard engines from 25 HP to 70 HP. It ensures precise camshaft timing for optimal engine performance and reliability across multiple model series including F25D, F30B, F40F, F50F, F50H, F60C, F60F, F70A, and their tilt variants.

Direct Replacement for: Yamaha OEM part number 6C5-46241-00 and Sierra aftermarket part number 18-15130. This belt is engineered to meet OEM specifications and deliver dependable service in marine environments.

• Fits Yamaha 4-stroke outboards from 25 HP to 70 HP (2008 and newer models)
• Precision-molded for accurate camshaft synchronization and engine timing
• Manufactured to OEM standards for durability in saltwater and freshwater conditions

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 Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 × Timing Belt (6C5-46241-00)

Installation Guide

1. Disconnect the battery and remove the engine cowling to access the timing belt compartment. Ensure the engine is cool before starting work.
2. Rotate the crankshaft to align timing marks on the crankshaft and camshaft pulleys according to your service manual. Document or photograph the alignment for reference.
3. Remove the old timing belt by loosening the tensioner and sliding the belt off the pulleys. Inspect all pulleys and tensioners for wear or damage.
4. Install the new timing belt onto the crankshaft pulley first, then route it around the camshaft pulley(s) following the correct path. Ensure the belt seats properly in all pulley grooves.
5. Tension the belt using the tensioner mechanism per manufacturer specifications. Verify that all timing marks remain aligned after tensioning.
6. Rotate the crankshaft manually through two full revolutions and recheck all timing marks. Confirm the belt tracks correctly without slipping or misalignment.
7. Reinstall the timing cover, engine cowling, and reconnect the battery. Start the engine and listen for unusual noises, checking for smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this timing belt fits my Yamaha outboard?
A: Cross-reference your engine model with the compatibility table above. Verify your OEM part number is 6C5-46241-00 by checking your service manual or the existing belt. For F40F models, ensure your engine is 2008 or newer.

Q: How often should I replace the timing belt on my Yamaha outboard?
A: Yamaha typically recommends timing belt replacement every 1,000 operating hours or 5 years, whichever comes first. Always consult your engine's service manual for specific intervals, and inspect the belt annually for signs of wear, cracking, or fraying.

Q: What are the signs that my timing belt needs replacement?
A: Warning signs include visible cracks or glazing on the belt surface, fraying edges, unusual squealing or ticking noises from the timing cover, difficulty starting, or rough idling. If you notice any of these symptoms, inspect the belt immediately.

Q: Can I install this timing belt myself or do I need a professional?
A: Timing belt replacement requires precise alignment of timing marks and proper tensioning. If you have mechanical experience and the proper tools (including a service manual with timing specifications), you can perform the job. Otherwise, professional installation is strongly recommended to prevent engine damage.

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.