Fuel Pump Assembly for Yamaha 9.9HP-15HP 4-Stroke Models (66M-24410-11-00)

Fuel Pump Assembly – Fits Yamaha 9.9HP/15HP 4-Stroke Outboard Motors

This fuel pump assembly is designed for Yamaha 9.9–15 HP 4-stroke outboard motors (approx. 1998–2006) and is also cross-compatible with several Mercury/Mariner 8–15 HP 4-stroke outboards from similar years. Engineered to meet or exceed OEM specifications, this part ensures reliable fuel delivery for 2-cylinder, 4-stroke outboard engines.

This component is a direct replacement for Yamaha part numbers 66M-24410-11-00, 66M-24410-10-00, 66M-24410-01-00, and 66M-24410-00-00, as well as Mercury part numbers 835389A2, 835389T1, and 835389T02.

• Installation Method: Direct OEM-style replacement.
• Fuel Compatibility: Designed for use with gasoline.
• Complete Kit: Includes the fuel pump, O-ring, and hose clamp for a full replacement.

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.

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 kit includes the following components:

• 1 x Fuel Pump Assembly (66M-24410-11-00)
• 1 x Hose Clamp (90467-09M09-00)
• 1 x O-Ring (93210-20M65-00, 2.65*20mm)

Explosion Diagram

Installation Guide

Follow these general steps to replace the fuel pump. Professional installation is recommended.

1. Safety First: Disconnect the negative battery terminal and ensure the engine is cool. Work in a well-ventilated area.
2. Relieve Fuel Pressure: Safely relieve the pressure from the fuel system according to your engine's service manual.
3. Disconnect Lines: Carefully disconnect the fuel inlet and outlet lines from the pump. Have rags ready to catch any residual fuel.
4. Remove Old Pump: Unbolt and remove the old fuel pump assembly from the engine block. Note the orientation of the fittings.
5. Install New Pump: Clean the mounting surface. Place the new O-ring and install the new fuel pump assembly, tightening the bolts to the manufacturer's specified torque.
6. Reconnect Lines: Securely reconnect the fuel lines and secure with the new hose clamp.
7. Final Checks: Reconnect the battery. Prime the fuel system by squeezing the primer bulb until firm. Check thoroughly for any fuel leaks before starting the engine.

Troubleshooting & FAQ

Q: How do I confirm this part fits my engine?
A: The best method is to compare your original part's number to those in our "Part Number Cross-Reference" table. Additionally, check your engine's model and year against the "Compatible Engine Models" list. If you are unsure of your model or serial number, use the Yamaha and Mercury identification guides linked above.

Q: What are the common signs of a failing fuel pump?
A: Symptoms of a bad fuel pump include the engine failing to start, stalling at low speeds, hesitation or loss of power during acceleration, and rough idling. A visual inspection may also reveal cracks or fuel leaks on the pump housing.

Q: Is this a direct replacement part?
A: Yes, this is an aftermarket part manufactured as a direct replacement. It is designed to fit and function just like the original OEM component without requiring any modifications.

Q: What is the difference between an OEM and an aftermarket part?
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.