Fuel Pump Assembly for Mercury/Mariner and Yamaha 8–15 HP 4-Stroke Outboards – Replaces 835389T1, 835389T02
Fuel Pump Assembly for Mercury/Mariner and Yamaha 8–15 HP 4-Stroke Outboards – Replaces 835389T1, 835389T02 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Fuel Pump Assembly for Mercury/Mariner and Yamaha 8–15 HP 4-Stroke ...
Fuel Pump Assembly for Mercury/Mariner and Yamaha 8–15 HP 4-Stroke Outboards – Replaces 835389T1, 835389T02 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket fuel pump assembly is intended for selected Mercury/Mariner and Yamaha 8–15 HP 4-stroke outboard applications. The listed applications include Mercury/Mariner 8 HP, 9.9 HP, 13.5 HP, and 15 HP carbureted 4-stroke outboards from approximately 1995–2006, along with Yamaha F9.9, T9.9, and F15 4-stroke outboards from approximately 1998–2006.
Before ordering, compare the original pump, mounting arrangement, hose connections, engine model, year, and applicable manufacturer part number. Application ranges can vary by market, model designation, and serial-number break.
This assembly is listed as an interchange for Mercury OEM part numbers 835389T1, 835389T02, and 835389A2; Yamaha part numbers 66M-24410-00-00, 66M-24410-01-00, 66M-24410-10-00, and 66M-24410-11-00; and aftermarket references Sierra 18-35302 and Mallory 9-35302.
- Aftermarket OEM-style replacement fuel pump assembly.
- Intended for selected 2-cylinder, 4-stroke outboard engines.
- Package includes an O-ring and hose clamps/clips as listed below.
Part Number Matrix
Use the following references to compare the replacement with the part installed on your engine. Supersession and interchange information should be confirmed against the engine application.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury | 835389T1 | Earlier reference; listed as superseded by 835389A2 |
| Mercury | 835389T02 | Earlier reference; listed as superseded by 835389A2 |
| Mercury | 835389A2 | Current reference listed for the application |
| Yamaha | 66M-24410-00-00 | Earlier reference; listed as superseded by 66M-24410-11-00 |
| Yamaha | 66M-24410-01-00 | Earlier reference; listed as superseded by 66M-24410-11-00 |
| Yamaha | 66M-24410-10-00 | Earlier reference; listed as superseded by 66M-24410-11-00 |
| Yamaha | 66M-24410-11-00 | Current reference listed for the application |
| Sierra | 18-35302 | Aftermarket interchange reference |
| Mallory | 9-35302 | Aftermarket interchange reference |
Engine & Model Compatibility
The tables below summarize the listed applications. Confirm the exact model, year, stroke, market, and serial-number range before installation. A general horsepower match alone does not confirm fitment.
Mercury/Mariner Applications: Listed for selected 8–15 HP 4-stroke models manufactured between approximately 1995 and 2006.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | BODENSEE (International) | 8 | 4-Stroke | 1995–2006 | 835389A2 | Earlier references listed as 835389T1 and 835389T02 |
| Mercury | 9.9 HP Carbureted, 323 cc | 9.9 | 4-Stroke | 1995–2006 | 835389A2 | Earlier references listed as 835389T1 and 835389T02 |
| Mercury | 13.5 HP Carbureted (International) | 13.5 | 4-Stroke | 1995–2006 | 835389A2 | Earlier references listed as 835389T1 and 835389T02 |
| Mercury | 15 HP Carbureted, 2-cylinder | 15 | 4-Stroke | 1995–2006 | 835389A2 | Earlier references listed as 835389T1 and 835389T02 |
Yamaha Applications: Listed for selected F9.9, T9.9, and F15 4-stroke models from approximately 1998–2007, depending on the model variant.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F9.9 | 9.9 | 4-Stroke | 1998–2006 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 2005–2006 | 66M-24410-11-00 | Current reference listed for the application |
| Yamaha | F15 | 15 | 4-Stroke | 1998–2006 | 66M-24410-11-00 | Current reference listed for the application |
| Yamaha | F9.9ELR2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | Specific model variant |
| Yamaha | F9.9MLH2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | Specific model variant |
| Yamaha | F9.9MSH2 | 9.9 | 4-Stroke | 2005 | 66M-24410-11-00 | Specific model variant |
| Yamaha | F15ELHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | F15ESHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | F15MLHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | F15MSHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | F15PLHA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | F15PLRA | 15 | 4-Stroke | 2002 | 66M-24410-10-00 | Listed as superseded by 66M-24410-11-00 |
| Yamaha | AMH | Not specified | 4-Stroke | 2007 | 66M-24410-11-00 | Specific model variant; verify before ordering |
Technical Specs
- Product Type
- Fuel pump assembly
- Installation
- OEM-style replacement
- Fuel Type
- Gasoline
- Connection
- Two hose barbs for inlet and outlet connections
- Housing Material
- Plastic housing with aluminum components
- Housing Color
- Black and silver
- Weight
- Approximately 215 g (0.47 lb)
- Fitting Type
- Hose barbs
- Warranty
- Coverage is subject to the applicable seller warranty and return policy
- Other Attributes
- Intended for selected 2-cylinder, 4-stroke outboard engines
What’s in the Box
- 1 × Fuel pump assembly
- 1 × O-ring
- 2 × Hose clamps or clips
- 1 × Installation instructions
Installation Notes
- Work in a well-ventilated area, disconnect the battery, and relieve fuel-system pressure before servicing.
- Clamp and disconnect the inlet and outlet fuel lines from the original pump, taking care to prevent fuel spills.
- Remove the mounting hardware and take off the original fuel pump assembly.
- Clean the mounting surface and inspect the fuel lines, fittings, and clamps for damage or contamination.
- Install the supplied O-ring if applicable, then position and secure the replacement pump.
- Reconnect the fuel lines in the correct inlet and outlet positions and secure them with the supplied clamps or clips.
- Prime the fuel system and inspect all connections for leaks before starting and operating the engine.
Troubleshooting & FAQ
How do I know if my fuel pump is failing?
Possible symptoms include hard starting, rough idling, hesitation or bogging during acceleration, stalling, and fuel starvation. These symptoms can also be caused by restricted fuel lines, a clogged filter, carburetor problems, or other fuel-system faults, so inspect the complete system before replacing the pump.
Will this pump fit my exact engine model?
Fitment depends on the exact model, year, stroke, market, serial-number range, mounting arrangement, hose connections, and original part number. Compare your original pump with the product details and verify the application before ordering.
What is the difference between Yamaha references 66M-24410-10-00 and 66M-24410-11-00?
These numbers are listed as related or superseded Yamaha references. The later reference may replace earlier versions for particular applications, but the exact model and serial-number application should still be confirmed before installation.
Are special tools required for installation?
Basic hand tools and suitable hose-clamp pliers are typically sufficient, although the required tools vary by engine model. Follow the engine manufacturer’s service procedures whenever available.
Is this an OEM part?
No. This listing is for an aftermarket replacement fuel pump assembly. The manufacturer and brand of the replacement may differ from the original equipment part.
How long does shipping take?
Shipping availability, delivery time, and cost depend on the destination and the shipping option selected at checkout.
What is the warranty and return policy?
Warranty coverage and returns are subject to the applicable seller policy. Contact support with your order details if the product arrives damaged or a manufacturing issue occurs.
Safety & Important Information
- Verify the original part number, engine model, year, stroke, mounting points, and hose routing before purchase.
- Do not install the pump if the connections, mounting arrangement, or replacement part differ from the original application.
- Fuel-system work presents fire and health hazards. Keep fuel away from ignition sources and clean spills immediately.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when the correct procedure or application is uncertain.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world operating conditions.
- Global Fulfillment — Shipping options and delivery estimates are shown according to the destination and checkout selection.
- Manufacturer-Direct Value — We aim to provide practical replacement parts at competitive prices.
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