Fuel Pump Assembly – Fits Yamaha 9.9–15 HP & Mercury 8–15 HP 4-Stroke (Replaces 66M-24410-11-00)
Fuel Pump Assembly – Fits Yamaha 9.9–15 HP & Mercury 8–15 HP 4-Stroke (Replaces 66M-24410-11-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Fuel Pump Assembly – Fits Yamaha 9.9–15 HP & Mercury 8–15 HP 4-...
Fuel Pump Assembly – Fits Yamaha 9.9–15 HP & Mercury 8–15 HP 4-Stroke (Replaces 66M-24410-11-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Fuel Pump Assembly – Fits Yamaha 9.9–15 HP & Mercury 8–15 HP 4-Stroke (Replaces 66M-24410-11-00) is an OEM-quality replacement for select Yamaha 9.9 HP to 15 HP 4-stroke outboard motors (1998–2006) and comparable Mercury/Mariner 8 HP to 15 HP 4-stroke models.
It serves as a direct interchange for Yamaha part numbers 66M-24410-00-00, 66M-24410-01-00, 66M-24410-10-00, and 66M-24410-11-00, as well as Mercury 835389T1, 835389T02, and 835389A2.
- Installs as a direct OEM-style replacement.
- Engineered for 2-cylinder, 4-stroke outboard engines.
- Includes fuel pump, hose clamp, and O-ring for a complete installation.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 66M-24410-11-00 | Current Part |
| Yamaha | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | 66M-24410-01-00 | Superseded Part |
| Yamaha | 66M-24410-00-00 | Superseded Part |
| Mercury | 835389T1 | Cross-Reference |
| Mercury | 835389T02 | Cross-Reference |
| Mercury | 835389A2 | Cross-Reference |
| Sierra | 18-35302 | Aftermarket Interchange |
| Mallory | 9-35302 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Yamaha Models: This fuel pump fits a range of F9.9, T9.9, and F15 outboards from approximately 1998 through 2006. Verify your specific model code and year.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F9.9 | 9.9 | 4-Stroke | 1998–2006 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 2005–2006 | 66M-24410-11-00 | |
| Yamaha | F15 | 15 | 4-Stroke | 1998–2006 | 66M-24410-11-00 | |
| Yamaha | F9.9ELR2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | |
| Yamaha | F9.9MLH2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | |
| Yamaha | F9.9MSH2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | |
| Yamaha | F15ELHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | F15ESHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | F15MLHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | F15MSHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | F15PLHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
| Yamaha | F15PLRA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Superseded by 66M-24410-11-00 |
Mercury & Mariner Models: This part is a compatible service replacement for select 8, 9.9, 13.5, and 15 HP 4-stroke outboards. Since model years vary, confirming your original part number is the most reliable method to ensure fitment.
Technical Specs
- Product Type
- Fuel Pump Assembly
- Installation
- Direct OEM-style replacement
- Fuel Type
- Gasoline
- Connection
- Two hose barb fittings
- Housing Material
- Plastic with metal top
- Housing Color
- Black with silver components
- Weight
- 0.21 kg (0.47 lb)
- Fitting Type
- Hose barb
- Other Technical Attributes
- Designed for 2-cylinder, 4-stroke outboard engines
- Warranty
- Varies by manufacturer; typically 1 year
What’s in the Box
- 1 x Fuel Pump Assembly (Replaces 66M-24410-11-00)
- 1 x Hose Clamp (Replaces 90467-09M09-00)
- 1 x O-Ring (Replaces 93210-20M65-00, 2.65*20mm)
Installation Notes
- Disconnect the negative battery terminal to prevent electrical hazards.
- Relieve fuel system pressure. Consult your engine's service manual for the specific procedure.
- Place a rag under the fuel pump to catch any fuel spillage.
- Clamp the fuel inlet and outlet lines before disconnecting them from the pump.
- Remove the mounting bolts securing the old fuel pump assembly.
- Carefully remove the old pump and any gasket or O-ring material from the mounting surface.
- Install the new O-ring (included) and position the new fuel pump assembly.
- Secure the new pump with the original mounting bolts, tightening to the manufacturer's specified torque.
- Reconnect the fuel lines and secure them with the new hose clamp (included).
- Reconnect the battery terminal, prime the fuel system, and carefully check for any leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my fuel pump is failing?
Common signs of a failing fuel pump include engine hesitation or bogging down, sputtering at high speeds, difficulty starting, stalling, or a general loss of power.
Is this a direct fit for my engine?
This pump is designed as a direct OEM-style replacement for the specific Yamaha and Mercury/Mariner models listed. To guarantee fitment, the best practice is to match your engine's original part number to one of the equivalents in our Part Number Matrix.
Can this pump be used with ethanol-blended fuel (E10)?
Yes, it is designed for use with modern gasoline, including E10 blends. However, for maximum longevity, avoid using fuels with higher ethanol concentrations unless specified as compatible by your engine manufacturer.
What is the difference between all the Yamaha part numbers listed?
The part number 66M-24410-11-00 is the latest version from Yamaha. The other numbers (like 66M-24410-00-00 and 66M-24410-10-00) are older, superseded versions that this pump also replaces.
My engine is a 2-stroke, can I use this pump?
No. This fuel pump is engineered exclusively for the 2-cylinder, 4-stroke outboard engines specified in the compatibility list.
Why are the Mercury/Mariner model years not listed?
Mercury and Mariner often used Yamaha-built powerheads in certain horsepower ranges, but the exact model year correspondence can be inconsistent. Therefore, for Mercury/Mariner engines, it is critical to verify fitment using the OEM part number (835389T1, 835389T02, or 835389A2) rather than relying on year alone.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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