Diaphragm – Fits Mercury/Mercruiser, Yamaha, Mariner 4–5 HP (Replaces 6E0-24411-00)
Diaphragm – Fits Mercury/Mercruiser, Yamaha, Mariner 4–5 HP (Replaces 6E0-24411-00) 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 replacement fuel pump Diaphragm – Fits Mercury/Mercruiser, Yamaha, Mariner 4–5 HP engines, designed to restore proper fuel flow and pressure regulation. It is compatible with a range of 4 HP and 5 HP outboard engines, including Mercury/Mercruiser (1984–2002), Yamaha (1984–1999), and Mariner (1984–1999) models.
This part serves as a direct interchange for Mercury OEM part numbers 6E0-24411-00, 6E0-24411-00-00, and Sierra 18-7389, among other equivalents.
- Installation Method: Direct Replacement
- Intended Fuel Type: Gasoline
- Connection Fit: OEM
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 6E0-24411-00 |
| Mercury | 6E0-24411-00-00 |
| Mercury | 6E02441100 |
| Mercury | 6E0244110000 |
| Mercury Mariner | 91753M |
| Sierra | 18-7389 |
| Oversee | 6E0-24411-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Compatible with select Mercury/Mercruiser 4–5 HP outboard engines manufactured between 1984 and 2002.
Compatible with select Yamaha 4–5 HP outboard engines manufactured between 1984 and 1999.
Compatible with select Mariner 4–5 HP outboard engines manufactured between 1984 and 1999.
| Brand | Model | Rated HP | Years | OEM Part No. |
|---|---|---|---|---|
| Mercury | 4 HP | 4 | 1984–1999 | 6E0-24411-00 |
| Mercury | 5 HP | 5 | 1984–1985, 1994–2002 | 6E0-24411-00 |
| Mercury | 4C/5C/AC | 4-5 | 6E0-24411-00 | |
| Yamaha | 4 HP | 4 | 1984–1999 | 6E0-24411-00 |
| Yamaha | 5 HP | 5 | 1984–1985, 1994–2002 | 6E0-24411-00 |
| Mariner | 4 HP | 4 | 1984–1999 | 91753M |
| Mariner | 5 HP | 5 | 1984–1985, 1994–2002 | 91753M |
Technical Specs
- Product Type
- Fuel Pump Diaphragm
- Installation
- Direct Replacement
- Fuel Type
- Gasoline
- Connection
- OEM Fit
- Housing Material
- Rubber/Elastomer
- Housing Color
- Black
- Dimensions
- 10.0" L x 9.0" W x 0.2" H
- Warranty
- Varies by manufacturer
- Other Technical Attributes
- Essential component of the fuel system ensuring proper fuel flow and pressure regulation
What’s in the Box
- 1 x Diaphragm (6E0-24411-00)
Installation Notes
- Ensure the engine is off and cool, and disconnect the battery as a safety precaution.
- Safely relieve pressure from the fuel system according to your engine's service manual.
- Place rags or a container below the fuel pump to catch any residual fuel.
- Carefully disconnect the fuel inlet and outlet lines from the pump.
- Remove the screws or bolts securing the fuel pump housing.
- Disassemble the pump to expose the old diaphragm, noting its position and orientation.
- Remove the old diaphragm, clean the housing surfaces, and inspect for any damage.
- Install the new diaphragm, ensuring it is correctly aligned with any guide pins or holes.
- Reassemble the pump housing and tighten the screws evenly to the specified torque.
- Re-mount the fuel pump assembly onto the engine.
- Reconnect the fuel lines securely, prime the fuel system, and check thoroughly for leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my fuel pump diaphragm is failing?
Common signs of a faulty diaphragm include the engine stalling or running rough, difficulty starting, a noticeable drop in performance, or visible fuel leakage around the fuel pump housing.
Will this diaphragm fit my specific engine model?
This part fits select Mercury, Mariner, and Yamaha 4–5 HP outboards from the years 1984–2002. Please review the detailed Engine & Model Compatibility table on this page to confirm a match for your motor.
What is the recommended replacement interval for a fuel diaphragm?
There is no fixed interval, but it is wise to inspect the diaphragm during routine fuel system service. We recommend replacing it every few seasons or immediately if you notice any signs of cracking, stiffness, or fuel seepage.
Do I need to use a sealant during installation?
Typically, no additional sealant is required. The diaphragm itself is designed to create a seal when the pump housing is properly assembled and torqued. Always consult your engine’s service manual for specific instructions.
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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