Timing Belt – Fits Yamaha F15 & F20 4-Stroke Outboard Engines (Replaces 6AH-46241-00-00)

Timing Belt – Fits Yamaha F15 & F20 4-Stroke Outboard Engines (Replaces 6AH-46241-00-00)

This aftermarket timing belt is designed for a range of Yamaha and WAHOO 4-stroke outboard motors. It serves as a critical component in the engine's timing system, ensuring the crankshaft and camshaft rotate in proper synchronization for optimal performance and engine safety.

Engineered to meet or exceed OEM specifications, this belt is a direct replacement for Yamaha part numbers 6AH-46241-00-00, 6AH-46241-01-00, 6AH-46241-02-00, Sierra 18-15136, and WAHOO F20-05000003.

• Primary Function: Synchronizes engine camshaft and crankshaft rotation.
• Engine Compatibility: Fits select Yamaha and WAHOO 15–20 HP 4-stroke models.
• Material: High-strength, durable rubber composite designed for marine environments.

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.

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Timing Belt (Replaces 6AH-46241-00-00)

Installation Guide

Installation requires mechanical expertise and familiarity with your engine's service manual. Always ensure the engine is off, the battery is disconnected, and the motor has cooled completely before beginning.

1. Access the Belt: Remove the flywheel cover and any other components obstructing access to the timing belt housing.
2. Align Timing Marks: Carefully rotate the crankshaft to align the timing marks on both the camshaft and crankshaft pulleys with the marks on the engine block. This step is critical.
3. Release Tension: Loosen the tensioner pulley bolt to release tension on the old belt.
4. Remove Old Belt: Slide the old timing belt off the pulleys. Inspect pulleys for wear or damage.
5. Install New Belt: Install the new belt, ensuring the directional arrows (if present) are correct and the teeth are properly seated in all pulley grooves. Maintain alignment of the timing marks.
6. Apply Tension: Re-tighten the tensioner to apply the manufacturer-specified tension to the belt. Do not over-tighten.
7. Final Verification: Manually rotate the engine two full revolutions and re-check that all timing marks align perfectly.
8. Reassemble: Reinstall all previously removed components and covers.

Troubleshooting & FAQ

How do I confirm this fits my Yamaha F20?
Check your specific model designation (e.g., F20SMHA) and year against our "Compatible Engine Models" table. For example, this belt fits the F20SMHA from 2012–2018 and is a direct replacement for OEM part number 6AH-46241-00-00. Always verify your part number.

What are common signs of a failing timing belt?
Symptoms of a worn or failing timing belt include a ticking or whirring noise from the engine compartment, engine misfires, rough idling, or difficulty starting. A visual inspection may reveal cracks, fraying, or missing teeth on the belt.

How often should a timing belt be replaced?
Replacement intervals are determined by the engine manufacturer and are typically based on hours of use or age. It is essential to consult your outboard's service manual for the recommended replacement schedule to prevent catastrophic engine failure.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.