Fuel Pump Gasket – Fits Mercury/Yamaha 4-5 HP Outboards (Replaces 6E0-24435-00, 27-91746M)
Fuel Pump Gasket – Fits Mercury/Yamaha 4-5 HP Outboards (Replaces 6E0-24435-00, 27-91746M) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Fuel Pump Gasket – Fits Mercury/Yamaha 4-5 HP Outboards (Replaces 6...
Product Details
This aftermarket Fuel Pump Gasket is designed for Mercury/Mariner and Yamaha 4-5 HP, 4-stroke outboard engines. It ensures a proper seal within the fuel pump assembly for optimal performance on models including Mercury 4A, 5C and Yamaha 4AC, MSH, AS, A, 5C, CS, and CMH.
It serves as a direct replacement for Yamaha part numbers 6E0-24435-00, 6E0-24435-00-00, 6E0-24471-00, 648-14342-23-00 and Mercury part number 27-91746M.
- Installs between fuel pump components to create a secure seal.
- Compatible with standard gasoline fuel systems.
- Engineered to prevent fuel leaks and maintain pressure.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Yamaha | 6E0-24435-00 / 6E0-24435-00-00 |
| Yamaha | 6E0-24471-00 |
| Yamaha | 648-14342-23-00 |
| Mercury | 27-91746M |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
For Mercury/Mariner engines, this part fits 4-5 HP 4-stroke models.
For Yamaha engines, this part fits a range of 4-5 HP 4-stroke models.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury | 4A | 4 | 4-Stroke | 27-91746M | |
| Mercury | 5C | 5 | 4-Stroke | 27-91746M | |
| Yamaha | 4AC | 4 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | MSH | 4 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | AS | 4 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | A | 4 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | 5C | 5 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | CS | 5 | 4-Stroke | 6E0-24435-00 | |
| Yamaha | CMH | 5 | 4-Stroke | 6E0-24435-00 |
Technical Specs
- Product Type
- Fuel Pump Gasket
- Installation
- Fits between fuel pump components
- Fuel Type
- Compatible with gasoline fuel systems
- Dimensions
- 3.5 cm × 3.5 cm × 0.1 cm (35 mm × 35 mm × 1 mm)
- Weight
- 0.01 kg (0.022 lb)
- Other Technical Attributes
- Ensures proper seal for optimal engine performance
What’s in the Box
- 1 x Fuel Pump Gasket (6E0-24435-00/27-91746M)
Installation Notes
- Ensure the engine is off and the battery is disconnected.
- Relieve any pressure from the fuel system.
- Disconnect the fuel lines leading to and from the fuel pump.
- Carefully remove the bolts securing the fuel pump assembly.
- Remove the old gasket and thoroughly clean both mounting surfaces of any residue.
- Position the new gasket correctly on the mounting surface.
- Reinstall the fuel pump assembly and tighten bolts to manufacturer-specified torque.
- Reconnect fuel lines, then the battery.
- Prime the fuel system and check for any leaks around the gasket before starting the engine.
Troubleshooting & FAQ
How do I know if this gasket fits my engine?
This gasket is for specific 4-5 HP, 4-stroke outboards from Mercury/Mariner and Yamaha. The best way to confirm is to check your engine's model number against the compatibility table on this page. Also, verify that your existing part's OEM number matches one of the cross-references listed in our Part Number Matrix.
What are the signs of a failing fuel pump gasket?
Common symptoms include visible fuel leakage around the pump, a strong smell of gasoline, difficulty starting the engine, poor idling, or a loss of power. These signs indicate that the seal is compromised and the gasket should be inspected and likely replaced.
Can I reuse my old gasket?
No. Gaskets are single-use components that compress to create a seal. Once removed, they lose their ability to seal effectively and should always be replaced with a new one to prevent leaks.
Is any sealant required with this gasket?
Generally, this type of gasket is designed to be installed dry without any additional sealant. Applying sealant can sometimes interfere with its ability to seal properly. Always follow your engine's service manual for specific recommendations.
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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
