Fuel Pump Assembly – Fits Mercury/Yamaha 8–15 HP 4-Stroke Outboard Motors (Replaces 835389T1, 835389T02, 835389A2)

Fuel Pump Assembly – Fits Mercury/Yamaha 8–15 HP 4-Stroke Outboard Motors

This fuel pump assembly is designed for Mercury/Mariner 8–15 HP 4-Stroke outboards (1995–2006), including 8 HP, 9.9 HP, 13.5 HP, and 15 HP carbureted models. It also fits Yamaha 9.9–15 HP 4-Stroke outboards (1998–2006), including F9.9, T9.9, and F15 models.

A direct replacement for a wide range of part numbers, this assembly ensures reliable fuel delivery for 2-cylinder, 4-stroke outboard engines. This kit provides a complete solution for restoring your engine's fuel system performance.

• Installation: Direct OEM replacement design.
• Fuel Type: Compatible with standard gasoline.
• Complete Kit: Includes the fuel pump, O-ring, and two hose clamps for a full 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.

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.

Mercury/Mariner Applications

Yamaha Applications

Technical Specifications

Package Contents

• 1 x Fuel Pump Assembly (Replaces 835389A2 / 66M-24410-11-00)
• 1 x O-Ring (Replaces Mercury 25-825478 / Yamaha 93210-20M65-00)
• 2 x Hose Clamps/Clips (Replaces Mercury 54-82047M / Yamaha 90467-09M09-00)
• 1 x Installation Instructions

Installation Guide

1. Safety First: Disconnect the battery and work in a well-ventilated area away from sparks or open flames.
2. Relieve Fuel Pressure: Follow your engine manufacturer's procedure to safely relieve pressure from the fuel system.
3. Disconnect Lines: Loosen the clamps and carefully disconnect the inlet and outlet fuel hoses from the old pump. Have rags ready to catch any spilled fuel.
4. Remove Old Pump: Unbolt and remove the old fuel pump assembly from the engine block. Note the orientation of the fittings.
5. Clean Surface: Clean the mounting surface on the engine to ensure a proper seal with the new O-ring.
6. Install New Pump: Place the new O-ring onto the new fuel pump and install the assembly onto the engine. Secure the mounting bolts evenly.
7. Reconnect Lines: Attach the fuel hoses to the correct inlet/outlet barbs on the new pump and secure them with the provided new clamps.
8. Final Checks: Reconnect the battery. Prime the fuel system according to your engine's manual. Start the engine and carefully inspect the pump and hose connections for any leaks.

Troubleshooting & FAQ

Q: How do I confirm this part fits my specific engine?

A: The best way is to match your original part number to one listed in our Part Number Cross-Reference table. You can also check your engine's model and year against our Compatible Engine Models list. For further help, use our serial number guides to identify your engine.

Q: What are the common symptoms of a failing fuel pump?

A: Common signs include the engine sputtering or bogging down at high speeds, difficulty starting, stalling, or a noticeable loss of power. These issues occur when the engine isn't receiving a consistent supply of fuel.

Q: What is included in this kit?

A: The package includes one complete fuel pump assembly, one new O-ring for sealing, two hose clamps, and installation instructions.

Q: OEM vs. 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.