Fuel Pump Diaphragm – Fits Mercury/Yamaha 6-8 HP (Replaces Mercury 11497M, Yamaha 6G1-24471-00-00)
Fuel Pump Diaphragm – Fits Mercury/Yamaha 6-8 HP (Replaces Mercury 11497M, Yamaha 6G1-24471-00-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This Fuel Pump Diaphragm – Fits Mercury/Yamaha 6-8 HP is a crucial component for maintaining your engine's fuel system. It is designed for Mercury/Mariner 6–8 HP 2-Stroke outboards and a range of Yamaha outboards, including 3 HP (1988–2002), 6 HP (1986–2000), and 8 HP (1984–2009) models.
This part serves as a direct replacement for Sierra 18-7833, Mercury 11497M, and Yamaha 6G1-24471-00-00, ensuring a precise fit and reliable performance.
- Engineered for direct-replacement installation.
- Essential component for fuel pump assembly.
- Designed for use with gasoline fuel systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sierra | 18-7833 |
| Mercury | 11497M |
| Yamaha | 6G1-24471-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits select Mercury/Mariner 6 and 8 HP 2-Stroke outboards.
Fits select Yamaha 3, 6, and 8 HP outboards from 1984 through 2009.
| Brand | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|
| Mercury/Mariner | 6 | 2-Stroke | 11497M | |
| Mercury/Mariner | 8 | 2-Stroke | 11497M | |
| Yamaha | 3 | 1988–2002 | 6G1-24471-00-00 | |
| Yamaha | 6 | 1986–2000 | 6G1-24471-00-00 | |
| Yamaha | 8 | 1984–2009 | 6G1-24471-00-00 |
Technical Specs
- Product Type
- Fuel Pump Diaphragm
- Installation
- Direct Replacement
- Fuel Type
- Gasoline
- Dimensions
- 5.13" H x 4.0" W x 1.13" L
- Weight
- 0.011 lbs (0.005 kg)
- Other Technical Attributes
- Fuel pump component
What’s in the Box
- 1 x Fuel Pump Diaphragm (Mercury 11497M / Yamaha 6G1-24471-00-00)
Installation Notes
- Disconnect the battery and relieve fuel system pressure before beginning.
- Locate the fuel pump assembly on the engine block.
- Disconnect the fuel lines from the pump, noting their orientation.
- Remove the mounting bolts securing the fuel pump.
- Carefully disassemble the fuel pump housing to access the old diaphragm.
- Remove the old diaphragm, taking care not to damage the housing surfaces.
- Clean the housing surfaces and install the new diaphragm, ensuring correct alignment.
- Reassemble the fuel pump, tighten bolts to the manufacturer's specified torque, and reinstall it on the engine.
- Reconnect fuel lines, prime the fuel system, and check for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my fuel pump diaphragm has failed?
Common signs of a failed diaphragm include poor engine performance, stalling, difficulty starting, or visible fuel leaks from the pump housing. The engine may run rough or lose power under load due to inconsistent fuel delivery.
Is this part compatible with ethanol-blended fuels?
Yes, this diaphragm is made from materials designed to be resistant to modern gasoline, including ethanol blends up to E10. However, prolonged exposure to higher ethanol concentrations can accelerate wear.
Can I replace just the diaphragm, or do I need a whole new fuel pump?
If the pump housing is undamaged and other components are in good condition, replacing only the diaphragm is an effective and economical repair. Inspect the rest of the assembly for wear, cracks, or corrosion during disassembly.
What is the recommended replacement interval for a fuel pump diaphragm?
There is no fixed replacement interval. It should be inspected during routine service and replaced at the first sign of stiffness, cracking, or fuel seepage. Its lifespan can be affected by fuel quality, ethanol content, and operating hours.
My engine model is listed, but the year is slightly different. Will it fit?
It might, but we cannot guarantee it. Manufacturers often make mid-year changes. Always verify fitment by comparing your original part's number and appearance to the information in this listing. When in doubt, contact us with your engine's serial number.
What's the difference between OEM and an aftermarket part?
This listing is for an aftermarket replacement part, not an original equipment manufacturer (OEM) component. It is engineered to meet or exceed OEM specifications for fit, form, and function, offering comparable performance at a better value. Our parts are made in an ISO 9002 certified facility and undergo batch-inspections for quality assurance.
How fast do you ship and what does it cost?
We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free. If available for your location, expedited shipping options and costs will be displayed at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter a problem, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original packaging. Please see our full policy page or contact us 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.
Payment & Security
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